Fender Output Transformer

The color coded wires made the connections a snap. 82 results for fender transformer Save fender transformer to get e-mail alerts and updates on your eBay Feed. My shop rate is $50/hr and I have a $100 minimum billing for chassis shipped in for repair. The power transformer and power tube circuitry is equal to the Super Reverb, but a smaller output transformer lowers the clean headroom and introduces sag and breakup. or something is hitting the secondary through the feeback loop. With more than twice the power of a Showman (200 watts RMS), and 100% tube circuitry, hand wired point to point, and five band equalization the short-lived Fender Studio Bass amp is one of their most rare and little known amps. Output Transformer Marshall, Fender 18w (Push Pull 2 x El84, 6v6) Vintage Amp. Output Transformers, EIA codes, tubes and hot-rodding. for Hiwatt Output Transf. Date of manufacture is 1973, 50th week. Shipped with FedEx Ground or FedEx Home Delivery. FENDER OUTPUT TRANSFORMER Replacement for Fender® Super Reverb, Concert and Tweed Bassman Combo amps. In order to navigate out of this carousel please use your heading shortcut key to navigate to the next or previous heading. has been manufacturing transformers in the Chicago area since 1943. According to the schematic I should be seeing around 440v there but it's almost three times that. The main parameters are: (a) the reflected primary impedance for a given secondary load impedance, which must match the needs of the particular tube being used, (b) the primary inductance, which determines the low frequency response, (c) the primary leakage inductance and. This transformer is built in China to my own custom design specs & is suitable for Marshall 18W, Fender Deluxe and similar circuits. Leo was a thrifty guy but he knew that output transformers could be a weak link, so that's one of the parts that he invested in. Original Fender part. The 59 Pro has the 8 ohm Triad 45217 output and the Triad 8087 power transformer. Fender Output Transformer - Hot Rod Deluxe and Blues Deluxe Reissue Output transf. A typical small transformer for a tube circuit might have a primary impedance of 10000 ohms with an impedance ratio of 10000:4 or a voltage ratio of sqrt(10000/4) = 50:1. Fender (Output Transformers) Model Names Similar to (MFG Part No. Mods for Re-issue Fender Tweed Bassmans. Specifications Wattage : 40 Primary Impedance (Ohms): 4250 C. Transformers for the twin were not used on the Showman and visa versa. 2, 8, 16 Ohms. The chassis is very clean and only needed replacement of aging electrolytics. Some blackface Fender amps use an 8-ohm, center-tapped transformer. Great for Tweed Super**, Brownface Super**, Tweed Bandmaster** and Tweed Pro** style amps. This is a new 15 to 25 VA Push-Pull model OT20PP Output transformer for tube guitar circuit applications (50Hz to 10KHz) using power tube pairs such as EL84 or 6V6. Back in the day, the most common source of amp failure was the speaker. 00 Univox U1101 Power Transformer, working - and big, and heavy. Output transformer for Fender Hot Rod amps. Since impedance varies as the square of the number of turns, the primary impedance for a power tube screen is 18. The primary impedance is 3 k and there is a 32 ohm an 8 secondary. If it’s a silverface amp, that 6 indicates 1976. The Plus Series offers Fender* and Marshall* type amplifier transformers for general replacement, upgrades and additional features such as international voltage taps. In order to navigate out of this carousel please use your heading shortcut key to navigate to the next or previous heading. Shipping time: 3-4 days. Orders placed before 1pm weekdays will be despatched the same day (excludes orders. Evatco is the preferred supplier of Hammond's classic range drop in replacement for Guitar Amplifiers, so if you need a new transformer for Marshall, Fender or Vox (and more), then have a look on line for your amp. The main parameters are: (a) the reflected primary impedance for a given secondary load impedance, which must match the needs of the particular tube being used, (b) the primary inductance, which determines the low frequency response, (c) the primary leakage inductance and. Tweed Twin Low Power 5E8-A Output Transformer MOJO767 $99. The power transformer looks to be the same as used in the 100 watt Twin Reverb, but the output transformer is noticeably bigger. Custom made to original specs right here in the Home of the Blues, Sweet home ChicagoIllinois USA. (replaces Fender p/n 041318), bolt-in, no drilling required, replacement output transformer for Fender Deluxe (blackface or silverface), also fits many other amplifiers using 6V6, 6BQ5,EL84, 7189, and 6CZ5, also lower powered (25W or less) amps with 6L6, 7591 or 7868. The tried. Date of manufacture is 1966, 24th week. The blackface Bandmaster is therefore ideal for those who look for a pure Fender clean sound without making ones ears bleed. If you want to: - Make product changes; - Create something not in stock. The Drake output transformer (p/n 784-103) has a primary impedance of 8,000 ohm. Mounting centers at 2" x 2. Some folks will judge an amp by the size of the output transformer but this is matter of taste. Primary and Secondary. Output Transformer - 4, 8, 16 Ohms. Fender used the "heavy" NFB circuit in the multi-speaker amps to compensate for their lower voltage delivered by their 2 and 4 ohm output transformer secondaries. A new transformer will not change an amp’s DNA or make a Marshall sound like a Vox. Stancor A-3801a output transformer (think Trainwreck Express). Faulty power supply filter caps. This transformer is built in China to my own custom design specs & is suitable for Marshall 18W, Fender Deluxe and similar circuits. Original Fender part. Output Transformers, EIA codes, tubes and hot-rodding. Transformers for the twin were not used on the Showman and visa versa. The keys to creating the bigger, stronger, and louder amp required lay primarily in two major ingredients; a new output transformer (OT) and a new speaker cab design. Mercury Magnetics transformers are the highest quality transformer upgrades for the Deluxe Reverb (vintage and reissue models) and they work exceptionally well to put the final touches on an amp with our modification kits. Description and pack size will be displayed. Output transformers marked UPGRADE (below) allow for more versatility by added secondary connections that did not exist on the original units. Now if it's a blackface amp, it's a safe bet that 6 means 1966. My amp is a 68' bandmaster with a Dual Showman output transformer and two more 6L6 power tubes. 3 preamp gain stages, Tremolo and Reverb, 2x6L6, 4x10 Speakers, larger 50 watt output transformer. TESTING OUTPUT TRANSFORMERS: It is not necessary to unwire the output transformer for this test, just pull the output tubes. Only at Sweetwater! Inspection and Financing for Fender American Vintage Stratocaster Aged White Blonde with Maple Fingerboard! Fender Custom Shop 1956 Heavy Relic Stratocaster - Nocaster Blonde with Ash Fender Design Experience American Deluxe Stratocaster - Hope this is the white light I walk to in the end. An output transformer salvaged from a junk 1950s or '60s AA5 will work well enough, though it is not ideal. Transformers. If it's a silverface amp, that 6 indicates 1976. Tube Guitar Amplifier - Output Transformers 1750 Series REPLACEMENT & UPGRADES Features Designed for drop in replacement of original units. Made by Schumacher for Fender. Transformer - Fender ® Replacement, Output, 3-½ W, 8 Ohm. The color coded wires made the connections a snap. Fender used the "heavy" NFB circuit in the multi-speaker amps to compensate for their lower voltage delivered by their 2 and 4 ohm output transformer secondaries. "Click" on thumbnail photos below for a full size photo of each part. The idea is to test for shorts that occur as a result of arcing between the leads and the winding wires in the transformer. 8 ohms, equivalent. It sounds really thin and distorts really bad when I use a distortion pedal, almost like half of the amp isn't working. Output transformers marked UPGRADE (below) allow for more versatility by added secondary connections that did not exist on the original units. Output transformers marked UPGRADE (below) allow for more versatility by added secondary connections that did not exist on the original units. If you would like to calculate and wind your own Single Ended and Push Pull Output transformers, I've made a simple automatic calculation spreadsheet along with a short PDF tutorial to help you. Quad 2, II original output transformer. All reproduction transformer are hand wound to the exact original specifications of winding geometry, steel laminations, materials, varnishes and of course sound. All work performed by David Allen, EE and guaranteed. This output coil can be grounded or floating (i. Fender amps with blown output transformers are probably as common as teles with broken headstocks. I once designed a few transformers with an older transformer guru who I discovered was a musician as well. History: This circuit is modeled after the '59 Fender Tweed Deluxe (5E3) amplifier. My amp tech has what is probably the best sounding amp that I've ever played through; a 1961 Fender Bassman with a tube rectifier and 4 ohm output transformer. The most expensive part I installed in my amp was a replacement output transformer. Power Transformers. The signal runs through the output transformer before exiting the speaker. To help out with this I've put a SURVEY FORMup to collect date, serial number and transformer info. Fender Output Transformer - Hot Rod Deluxe and Blues Deluxe Reissue Output transf. Remember that Fender dealers could order any of. I have tried to copy fender champ designs with a 68k and 1 meg resistor on the input, removing. From Italy. Home » Unknown Type » Xfmr Pwr Stage 112Se Exp. The primary impedance is 3 k and there is a 32 ohm an 8 secondary. no the AO44 is a push pull type amp it uses 2x ecl86 tubes but any output transformer that is push pull type and works for 2 EL84 tubes (ecl86 has 1/2 of a 12ax7 and 1 el84 in 1 tube) should work i think Hammond universal push pull 8w would work plus offer different speaker outputs, the Ao44 was 8ohm speaker only. Heavy and Hard-to-Find! This is an original Fender Super Twin Output transformer from the 1970s. Now if it’s a blackface amp, it’s a safe bet that 6 means 1966. Features digital reverb, wide range solid state tremolo, 10 inch vintage CTS speaker, an oversized power supply and output. 6,000 + (and growing) factories in our existing network are eager to make it for you. Since impedance varies as the square of the number of turns, the primary impedance for a power tube screen is 18. How to Test a Transformer. I have been wondering if I should put it on ebay or what. Please visit my Tube Amplifier Forum Here's the place you can go to ask tube amplifier questions. Reverb Driver Transformer for Fender $19. Tube amp Transformers, Heyboer transformers, power transformers, output transformers, chokes, toroid transformer, wall warts, Fender, Marshall, Vox. Best Regards CE. From Italy. Fender Rhodes Tine Spring $1. were kept as close as possible to the original part to preserve the stock "tone". The output transformer's primary takes in a high voltage, low current signal (high impedance) and puts out a low voltage, high current signal (low impedance). History: This circuit is modeled after the '59 Fender Tweed Deluxe (5E3) amplifier. The radio had two sets of mounting holes, so this one fit perfectly even though it was a little bigger than the original. There are hundreds of pages of Tube amp information on my library page. Works great, no issues! No trades and no low ball offers. for Marshall Output Transf. A new transformer will not change an amp's DNA or make a Marshall sound like a Vox. A bolt-on replacement for Fender Champs, but also useful for many do-it-yourself projects and repairs on vintage amplfiers & radios. Many amps work with either 4 or 8 ohm loads, allowing for extension speakers. Standard Mod + Output, Power, Reverb & Choke Transformers = Platinum Mod™ The ultimate in tone and performance! Includes Standard & Deluxe Mods™ (see above) Same as USA Platinum Mod! No need for step-up transformers that can harm your amp! Includes Standard & Deluxe Mods™ (see above). Items in Fender® Replacement Output Transformers Sort Item A-Z Item Z-A Item Name A-Z Item Name Z-A Price Low to Hi Price Hi to Low Items per page 40 80 120 50W/2 Ohm, 4 Ohm & 8 Ohm Fender® Replacement Output Transformer. Tweed Twin Low Power 5E8-A Output Transformer MOJO767 $99. Presets & Setlists. All we need to do is determine the turns ratio of the transformer, and with that information we can calculate what impedance will be reflected back to the primary with a given load on the secondary. Special thanks to Terry Stinger (z_stingray) for the PCB layout. From very early tweed models with a single 15 or a trio of 10’s, the short lived (1960 only) brown combo, the fabled blond, brown, and. See, I have a fender bassman reissue and I just doesn't sound right. Pri Ohms Sec Ohms Amplifier Type Watts Bobbin/Paper Winding (There may be more) (There may be more) 1750A 22800 8 Single Ended. Mercury Magnetics transformers are the highest quality transformer upgrades for the Blues Deluxe (USA and Reissue versions) and they work exceptionally well to put the final touches on an amp with our modification kits. This is a key feature, meaning that there are only 2 effective operating modes of this power stage topology IF you really felt compelled to go for a single output jack. EUROLITE LED MFX-1 Strahleneffekt,Fender Blackface Deluxe Reverb Output Transformer (773 / 125A1A / 022640 Type),EatSmart Precision Pro Digital Kitchen Scale, Silver, New, Ships next day 802194159928. Amplifier and amplifier modification kits. Fender Style Output Transformers. There are several things that are important in getting an output transformer made. JMI Music is. It has a larger footprint than the chassis was originally drilled out for. Below is the color code that Bruce Heran uses for his valve audio projects. 8 ohms, equivalent. I had an amp guy look at it and he said it may be the output transformer, but I wanted to send it to a fender warranty repair store. What does it mean to have an amp "blackfaced"? Thru the 50s, 60s and 70s Fender was in a wattage race with the other amp manufacturers. Works perfectly for a 6AQ5 output tube. Output Transformers. Importantly output transformers have different primary impedances. Description: Multiple use 6K to 2. transformers works on the speakers also. Deluxe, Deluxe Reverb Output Transformer. Mpn: 022913. Money doesn't always = tone. The last version had a super bright neon blue which held its tint. for Laney Output Transf. Power Transformers. I can't find anyone selling the Heyboer TO20 any more that BillM developed - certainly not here in the UK - and the only other one I know of is the Hammond 1750F or 1760F, however I can't find any Google search results from anyone that has used that one. 67 / 4 / 8 Ohm version. 12671-2 Stancor Output Transformer Tube Amp Fender Single End Se Watt (43. Check the power output marked at. With more than twice the power of a Showman (200 watts RMS), and 100% tube circuitry, hand wired point to point, and five band equalization the short-lived Fender Studio Bass amp is one of their most rare and little known amps. Yes, the power transistors give up earlier than the transformer but if the transformer is too small right from the start you are calling for trouble. Fender Style Output Transformers. "Start" and "finish" are arbitrary terms with respect to this configuration. Fender Output Transformer - Hot Rod Deluxe and Blues Deluxe Reissue Output transf. for Marshall Output Transf. If you want to: - Make product changes; - Create something not in stock. The load line intercepts an imagined curve for a 286V screen at a plate voltage of 15V and a plate current of 71mA. When a second speaker is plugged in, the transformer's center-tap is selected, halving its output impedance to match the new, 4-ohm load. Works perfectly for a 6AQ5 output tube. Tweed Twin Low Power 5E8-A Output Transformer MOJO767 $99. The best way is to use a Variac (variable auto-transformer) which will allow us to vary the input voltage to the transformer, and bring the voltage up slowly (see note below). The main parameters are: (a) the reflected primary impedance for a given secondary load impedance, which must match the needs of the particular tube being used, (b) the primary inductance, which determines the low frequency response, (c) the primary leakage inductance and. Mark holes (Photo 35) for the transformer mounting screws and for the wire pass-through hole that will be grommeted. Importantly output transformers have different primary impedances. Qualified orders over $99 will ship to you without incurring a shipping fee. Fca2765engaps829a Manclark Famille Crest Coat Ouvre-Lettre of Arms ttykew885-Fournitures de bureau. Email Me when back in stock. For Power Transformer, you can choose between the 40-18021, 40-18017, or 40. The replacement transformer I purchased, a Heyboer TO20, was specifically designed with the Blues Jr. I am currently building an Blackface AB763 based head that will be similar to a Bandmaster Reverb in output and function. There are several things that are important in getting an output transformer made. THe speaker is 8 Ohmcan I use a multimeter to get the output value of the transformer?. replaced the output transformer with a Magic Parts transformer for a Twin Reverb. Original Fender part. "Start" and "finish" are arbitrary terms with respect to this configuration. For guitar amplifiers we provide accurate reproductions of classic transformers for Marshall, McIntosh, Fender, HiW. Best example is the MOSFET 100 Marshall. 18 Vintage 1940's Western Electric 288a Condenser Transformer Input Output Ret. Far more than tubes, speakers or other amp components, the transformers establish the platform for shaping your amp's unique sound. Unfollow fender transformer to stop getting updates on your eBay Feed. 12671-2 Stancor Output Transformer Tube Amp Fender Single End Se Watt (43. If you are worried about tubes, it is WAY more likely that a screen resistor is burnt or there is a short between socket pins or who knows what, rather than a transformer failure. 4 lbsWarning: Not all amplifier models of the same name use the same transformer model. Reproduction output transformer for Hammond AO28 preamplifiers. The last item in the signal chain of the audio path of a push-pull type guitar amplifier is the output transformer. The output transformer's primary wiring should be left as-is. It has a larger footprint than the chassis was originally drilled out for. Hammond's commitment to quality ensures users will always receive the specialized components their custom DIY projects or OEM requirements deserve. Gotta LOVE the sound of that Heyboer output!. Fca2765engaps829a Manclark Famille Crest Coat Ouvre-Lettre of Arms ttykew885-Fournitures de bureau. Here is a load line through the DC operating point for an output transformer with an 8kΩ primary impedance. And just because an output transformer costs a lot, doesn't mean it will sound great. A Little Love for the Fender Bandmaster Reverb. Qty: Tweed Twin High Power 5F8-A. Equivalent to #050438. FENDER OUTPUT TRANSFORMER Replacement for Fender® Super Reverb, Concert and Tweed Bassman Combo amps. And just because an output transformer costs a lot, doesn't mean it will sound great. mains transformer for Fender® 135W models: This 013830 mainstranformer is used for all 135 Watt Fender amps of the 1970s: Twin Reverb, Dual-Showman Reverb, Bassman 135, Quad Reverb and Vibrasonic Reverb. Fender part number 012413 stamped on the side and also on a piece of masking tape on the bottom. For Power Transformer, you can choose between the 40-18021, 40-18017, or 40. My amp is a 68' bandmaster with a Dual Showman output transformer and two more 6L6 power tubes. History: This circuit is modeled after the '59 Fender Tweed Deluxe (5E3) amplifier. All reproduction transformer are hand wound to the exact original specifications of winding geometry, steel laminations, materials, varnishes and of course sound. Beware of these substitutes! These may be substandard products that are not true replacements, use inferior construction methods and materials and lack the great features and pricing of our ClassicTone transformers. Large selection of parts and electronic components for guitars, amplifiers, synthesizers and tube and solid state hi-fi, quick shipping, expert technical advice. TO11S Heyboer output transformer rated 4,000 ohms primary to 4 or 8 ohms secondary. This shopping feature will continue to load items when the Enter key is pressed. Primary and Secondary. When a second speaker is plugged in, the transformer's center-tap is selected, halving its output impedance to match the new, 4-ohm load. 5 watts at 5% at 1 KHz. First, you want to check that the wires coming from the power switch to the transformer are securely attached and the solders on the wires going from the transformer to the circuit board are secure. This transformer is a large blocky metal device mounted on the chassis of a guitar amplifier. or something is hitting the secondary through the feeback loop. You were in there with a soldering iron doublecheck for cold joints. specializes in amplifier transformers! More than 80% of our transformers manufactured is for this market and bring over 70 years transformer manufacturing expertise to our product. I plan to build a variety of cabinets to use with it, so I want the flexibility of a multi-tap OT. Working with Fender and surf-rock pioneer Dick Dale, our 100W output transformers became an integral component in the world's first 100W guitar amplifier. 3 V filament test transformer, and clip one alligator clip to the output transformer secondary tap. Here's a factory new Mercury Magnetics Tweed Champ output transformer pn FTCHO-5 If you're reading this, you know that Mercury builds the finest transformer on the planet. So the output transformer ought to work for my amp. Output transformers for Fender, Marshall, VOX Show 1 to 12 (of in total VOX® Output Transformer AC50CPH / AC50CP2 / AC30HH / AC30H2L / A. Here's what you do; Take your little 6. Power output is approximately half the product of peak voltage swing and peak current swing: (286V-15V)(71mA-37mA)/2 = 4. Replacement transformer for Deluxe , Deluxe Reverb. OT size also tends to equate to maximum wattage capabilities, although the OT can only translate what the output tubes provide. Actually the Concert is 40W and the OT can handle 50W, which is nice. I recently scored several crates full of old fender and marshall transformers from a family run music store that went out of business, the majority of the fender transformers are pre-1968 (cloth wire). All of ours have shields for extra protection. Some designs sound better with a small output transformer. The blackface Bandmaster is therefore ideal for those who look for a pure Fender clean sound without making ones ears bleed. Amp is labeled by Fender as 185 watt RMS output. Thanks in advance for your help. I found this one on the web and ordered it. The Hammond 1750H output transformer is directly compatible and also gives more power - but you do have to drill a hole in the PCB (a non printed part). Fender Output Transformer, 0026478000. I do however have an extremely high surplus of voltage on pin 3 of the output tubes and I'm not sure why. OT size also tends to equate to maximum wattage capabilities, although the OT can only translate what the output tubes provide. It sounds like taking a heavy blanket off of your amp. All of the transformers tested were pint sized compared to the Electra-Prints. My amp tech has what is probably the best sounding amp that I've ever played through; a 1961 Fender Bassman with a tube rectifier and 4 ohm output transformer. Output transformers marked UPGRADE (below) allow for more versatility by added secondary connections that did not exist on the original units. The following chart, was originally printed in VG magazine, by Gerald Weber. com - View our excellent collection of Fender Transformers. The best way is to use a Variac (variable auto-transformer) which will allow us to vary the input voltage to the transformer, and bring the voltage up slowly (see note below). FENDER OUTPUT TRANSFORMER Replacement for Fender® Super Reverb, Concert and Tweed Bassman Combo amps. See, I have a fender bassman reissue and I just doesn't sound right. Would that indicate that it was made the 46th week of 1973? There is a faint blue ink stamp on the side of the chassis that reads "T-4". "Click" on thumbnail photos below for a full size photo of each part. 2 358-s Peavey Speakers 300 w 3 way sound reinforcement system dj stage 26x21x16. As with most gear. For Power Transformer, you can choose between the 40-18021, 40-18017, or 40. The Super Reverb features four 10 inch, eight ohm speakers and an upgraded output transformer that make it a big, heavy amp with great bottom end punch and lots of output volume--it's almost as loud as the Twin Reverb. I have two vintage Fender transformers, one is power the other is output. Grand-Stack version with fatter Stack (1 inch) increases Punch und Bass! 2x 6V6GT to 4, 8 Ohms. Replacement transformers are not always identical, so if you get squeals or other odd sounds when hooking up a new output transformer, try reversing the output leads. Please check out your application before purchasing this. This transformer is built in China to my own custom design specs & is suitable for Marshall 18W, Fender Deluxe and similar circuits. Hi, I am trying to find a good OT replacement for my Blues Junior III NOS "Tweed". Parts , Accessories-Terrapin Audio Transformer for Microphone 1 40 Cobalt Core Ribbon Amorphous nabyzo664-sale online - www. I have tried to copy fender champ designs with a 68k and 1 meg resistor on the input, removing. The signal runs through the output transformer before exiting the speaker. Specialising in transformer rewinds for valve radios, valve amplifiers and any other vintage valve equipment. Most Fender push-pull amplifier designs use negative feedback, tapped from the output transformer speaker winding to enable more headroom before power stage distortion starts. An open circuit (no speaker load) is an infinite impedance and a valve amp should not be played (signal continuously applied) under these circumstances as damage to the output transformer or output valves could result. The blackface Bandmaster is therefore ideal for those who look for a pure Fender clean sound without making ones ears bleed. Paper layer wound like the vintage era original output transformers!. This can be the 4, 8, or 16 ohm tap. Output transformers marked UPGRADE (below) allow for more versatility by added secondary connections that did not exist on the original units. Beware of these substitutes! These may be substandard products that are not true replacements, use inferior construction methods and materials and lack the great features and pricing of our ClassicTone transformers. "Click" on thumbnail photos below for a full size photo of each part. Fender Bassman output transformer, removed from working amp. The ground wires that connect all of the tube sockets should be left intact. The radio had two sets of mounting holes, so this one fit perfectly even though it was a little bigger than the original. Marshall Output transformers: Built to Vintage specs with exact interleave ratios and materials. Fender Output Transformer, 0026478000. com - Fender Original Hot Rod Deluxe output transformer. Instead of Dynaco transformers, Hammond 1608A audio output transformers and a Hammond 272HX power transformer were used. Equivalent to #050438. Power output is approximately half the product of peak voltage swing and peak current swing: (286V-15V)(71mA-37mA)/2 = 4. Reverb Driver Transformer for Fender $19. This amp proved to be the most popular of the Pawn Shop series, but Fender's policy is to limit each model. Few people working in transformer winding companies have a knowledge of electronics or valve amps. Transformer - Fender Original, Output, Hot Rod Deluxe. A new single-ended output transformer with a 8000 ohm (8K) primary and both 4 and 8 ohm secondary connections. Direct Replacement for Fender #s 022640, 041318, & 125A1A. An output transformer with that primary impedance is very unlikely. In the real world it is a 50W amp. Mods for Re-issue Fender Tweed Bassmans. Home » Unknown Type » Xfmr Pwr Stage 112Se Exp. Proper output transformer design is crucial to the success of an audiophile quality amplifier. Connect a line cord to the primary winding of the transformer (be sure to insulate the connections to avoid an accidental shock). I might be talking through my ass but for hum to come out the speaker it means something is hitting the primary on the output transformer. The Plus Series offers Fender* and Marshall* type amplifier transformers for general replacement, upgrades and additional features such as international voltage taps. Great for Tweed Super**, Brownface Super**, Tweed Bandmaster** and Tweed Pro** style amps. About Fender Tone. 7K RED SHIELD 120K 910K 330p WHITE SHIELD 2200p TL072 7 5 6 4 8 +--15V +15V 470K 10K + 330K. You were in there with a soldering iron doublecheck for cold joints. Projects (return to top) KALAMAZOO REVERB-12 This project is based on a Kevin O'Connor circuit design (Soma '84, TUT-5). The half-primaries of the output transformer should have identical voltages on them. Output Transformer Marshall, Fender 18w (Push Pull 2 x El84, 6v6) Vintage Amp. Leo was a thrifty guy but he knew that output transformers could be a weak link, so that's one of the parts that he invested in. For more on impedance matching and cabinet wiring, check our speaker wiring FAQ. G al l er y Fender (Output Transformers) Hammond Primary Secondary Amp Power Plastic Bobbin or Amplifier Equivalent To Part Number (Ohms) (Ohms) Typ (Watts) Paper Wound Coil? Model Names Manufacturer. Email Me when back in stock. for Hiwatt Output Transf. dropin replacement for most vintage Ampeg Jet & Reverborocket and some. DIY Push-Pull (PP) 6V6 / 6V6GT Tube Amplifier Schematic. The Tweed Deluxe Speed Shop builds the finest Fender Tweed-era guitar amplifiers utilizing only the highest-quality new components as well as Speed Shop reverse-engineered TD58OT and TC58OT output transformers, A12Q and A10Q vintage AlNiCo speaker recreations, NOS (New Old Stock) resistors, capacitors, sockets, hardware - and vintage NOS tubes. Stancor A-3801a output transformer (think Trainwreck Express). Fender installed casters on some larger amps and cabs beginning in 72. 2"Mounting TypeVerticalWeight3. Condition is Used. The output transformer has a common wire and one or more speaker taps, usually at 4, 8, and 16 ohms. It sounds really thin and distorts really bad when I use a distortion pedal, almost like half of the amp isn't working. For this particular reading, you'll need to change your test leads to the CURRENT input jacks, and select the 200 mA DC range. Remember that Fender dealers could order any of. I suppose that makes sense for a number of reasons, but you have to search fairly hard to find a new one. Quad 2, II original output transformer. While he was going through my Princeton I was in the other room trying all the cool amps that he has; a converted Film'O'Sound, Garnets, and this one. Fender used the "heavy" NFB circuit in the multi-speaker amps to compensate for their lower voltage delivered by their 2 and 4 ohm output transformer secondaries. Primary and Secondary. They drive the output transformer, then the speakers. Stancor A-3801a output transformer (think Trainwreck Express). Power output is approximately half the product of peak voltage swing and peak current swing: (286V-15V)(71mA-37mA)/2 = 4. (replaces Fender p/n 041318), bolt-in, no drilling required, replacement output transformer for Fender Deluxe (blackface or silverface), also fits many other amplifiers using 6V6, 6BQ5,EL84, 7189, and 6CZ5, also lower powered (25W or less) amps with 6L6, 7591 or 7868. Drill down a little further, therefore, and it’s no surprise that much of the effort lay in upgrading the amp’s output stage, especially its output transformer (OT). Using two cabs you are squeezing out 100W which gives the amp the final. dropin replacement for most vintage Ampeg Jet & Reverborocket and some. Have a 70's model super twin with weak output. I had an amp guy look at it and he said it may be the output transformer, but I wanted to send it to a fender warranty repair store. The replacement transformer I purchased, a Heyboer TO20, was specifically designed with the Blues Jr. I have an output transformer taken from a Fender guitar amplifier using EL34 tubes. Importantly output transformers have different primary impedances. 47 µ 2K 10p. Projects (return to top) KALAMAZOO REVERB-12 This project is based on a Kevin O'Connor circuit design (Soma '84, TUT-5). So the output transformer ought to work for my amp. 5 watts at 5% at 1 KHz.