Feb 12, Perhaps these two Showman amps were field prototypes, experimental units, transitional between the AB and AC circuit, or just a plain bad idea. Do not use other types. As the story goes, Leo Fender wanted Jensen to make some changes to speakers and either the speaker couldn't price constraints? Going to clean the pots and reseat the valves, if it needs more I guess I'll start a new thread Thanks again M. I recognized the 60 cycle hum and thought perhaps the filter caps were shot, but it turned out the two ohm ground resistors for the tube filaments were never installed at the factory!!! There are some silverface Twin Reverbs from circa and Vibro Champs from circa without an "A" prefix in the serial number I hate when that happens. Sometimes my answers are very short, but that's usually because I have a lot of other e-mail to read and answer. The "P12R" identifies the type of magnet, the size, and the quality of the speaker. Were 1, or 10, orSuper Reverbs made? Probably the same as the pots and transformers that we just dug out of the boxes. The suffix code letter identifies the quality of the speaker. Gearhead" web site www. Though we don't know why s were used, perhaps Leo got a good deal from RCA on a boatload of these tubes so he tried them out in the Dual Showman and Twin Reverb. A low- noise, low-microphony 12AX7 or is recommended.
Rencontre wannonce Dating fender amp serial number lo rencontre mignonneS.V.V.A. - Dating Fender AmpsReading Guitar Potentiometer CodesVintage Guitars Info - dating vintage guitars, amps by date source code Hoffman Amplifiers Tube Amp Forum, Dating my Fender amp. Code on the power transformer is does the mean January ? Quote from: FYL on August You can also look at the pots for date codes. It's a similar. We have yet to find an amp with a potentiometer mounted there and no . 6) Transformer codes (if the amp doesn't have date codes on the tube chart). And dating fender amps by transformer codes many people ask me to try and. The potentiometer date codes, the transformer codes and as much other you. While most guitar amps have multiple 10″ and 12″ speakers the Vibroverb came with a It had the original transformers with date codes, original cover, The 10K mid control pot was placed in the position of the Bass pot, which was. Dating Your Fender AmpHow to date vintage fender amps - Vintage & Rare BlogBF,SF Vibroverb, Help me date my Fender Amps., Telecaster Guitar Forum Without date codes from transformers, pots and/or speakers, it’s not possible to predict amp dates by serial number. Eventually, the hope is to have enough info for a more detailed breakdown on the B series, A+6 digit and F+6 digit series. DATING FENDER AMPLIFIERS (INCLUDING SILVERFACE AND BLACKFACE AMPS) USING TRANSFORMER CODES In general, Fender amps that don’t have rubber-stamped tube sticker date codes have EIA numbers on their transformers that might enable determination of the production date. dating fender transformers, speakers & potentiometers using eia codes EIA (Electronics Industry Association) Source-Date Codes: Electronic components such as transformers, potentiometers, speakers, and some capacitors are often stamped with a date code, which indicates the manufacturer and the manufacturing date.
Superior Music - Fender Amp, Amplifier Serial NumbersDating Your Fender Amp FENDER AMP Chassis Serial Number DATE CODES .. On 3 digit date codes, you have to "guess" the decade of the pot or speaker. Usually this isn't too. If you provide date codes off transformers and speakers we can verify. . Mike_LA, those six articles entitled "Dating Fender Amps" are valuable One wants to know how to identify dates of speakers, transformers, pots. Besides, no article in the Dating Fender Amps by Serial Number series would be These are marked with EIA code “” which is the company number for Probably the same as the pots and transformers that we just dug out of the boxes. Superior Music - Fender Amp, Amplifier Serial NumbersFender Amp Field GuideFender® Forums • View topic - Twin Reverb amp dateS.V.V.A. - Dating Fender AmpsVintage Guitars Info - dating vintage guitars, amps by date source code week of will have the same date code. The only good thing about dating amps this way is Fender never deviated-still valid today. I use this before buying a amp always-check all four transformers-will tell you if there has been problems along the way. Very rare to find different year trans. in any Fender . The Code on the tube chart of your Fender Amp is made up of two letters. The First letter equates to the Year and the Second letter to the Month. How the Source-Date Code Works. The source-date code on a pot is a 6 or 7 digit code impressed into the casing of the potentiometer. a transformer code of , in a Blackface era Fender amp. American pot manufacturers had their own numerical codes, for example = Centralab, = CTS and = Stackpole. Although many others were used, these are by far the most important, as they were widely used by the likes of Gibson, Fender, Guild and Epiphone. Non-Schumacher transformers – It’s been universally accepted that Fender only used Schumacher transformers on amps made in the s and s. These are marked with EIA code “” which is the company number for Schumacher. On popular Fender models, the pot date can be very close to the actual date of the instrument. On less popular Fender instruments, such as LapSteels, pots can be as much as two years earlier than the actual date of the instrument. Gibson didn't start using pots with source-date codes till or Originality.
Date fender amp by transformer codes pot -
Power tubes--a pair of 6L6GCs s originally specified. If you pulled the V1 12AX7 tube you may use it as V6 phase inverter. Fourth tube is a 12AX7. Maybe they'll show up on eBay. It's just my opinion, but I think the slightly larger cab makes the amp sound even better. One thing we know for sure is that production codes can help date an amp to a particular month within a given model run. RizoDec 23, Please note this is very important that there are many exceptions to the "rules" I have outlined here. Electronic components such as transformers, potentiometers, speakers, and some capacitors are often stampted with a date code indicating who manufactured them and when. If so, you can check the pot or speaker for the source-date code, and determine an approximate age from that. This tube need not be low-noise or nonmicrophonic. These were almost always at the extreme left of the chassis, when looking at the rear of the amp. Recommend using matched pair of glass 6V6GTs. Since Fender used speakers from all the above companies. Some collectors send information, others, upon first contact, run away to their secret underground amp lairs never to be heard from again. Obviously not a collectors amp like this, but I find it way more functional for my needs with the 12" speaker and larger cabinet. So, driving the Twin with any amount of distortion lowers the power handling capacity of the speaker, which makes any speaker more susceptible to damage; even a high-wattage type like the JBL. OutcasterFeb 11, Bias should be adjusted when tubes are replaced. The prefix code letter identifies the type of magnet used in the speaker. Second tube is a driver stage for both channels of preamp, specified. For those readers who may have joined us recently, I am doing some Fender amp research along with Devin Riebe and Greg Huntington.
Date fender amp by transformer codes pot
I think the better, older hands did 35 a day. The good news is that good progress is being made, but I am in fact, still desperate if you could only see the pitiful look on my face right now for more info, especially for tweed, brown, blonde and silverface amps. They didn't bother changing the smaller amps until a few years later We also have two others from this same production batch with September tube chart dates so it looks like this was the last month of production for the venerable Tremolux. Yes, my password is: The date of the change from the blackface circuit to the CBS silverface circuit was dependent on the model, but most of the amps that were modified received the circuit change by mid-year of It can be stamped or marked on any product to identify the production source vendor and date of manufacturer. According to the Superior Music website that was mentioned here on another thread, it looks like it points to a amp. Speaker guru Ted Weber explains: A low noise, low microphony tube is recommended here. But I know the 2 would be similar, so I am not sure how he came up with his conclusion. Before we get into the amp info, let me give you an update on what's been going on since I've been getting a lot of e-mail asking when the results of the research is going to be available. Log in or Sign up.
Date fender amp by transformer codes pot -
- In the above example, the transformer was made in either or , week Now if it’s a blackface amp, it’s a safe bet that 6 means If it’s a silverface amp, that 6 indicates This code can be found on the power transformer, output transformer, choke, and reverb transformer.
- Dating Fender Tube Amps by Serial Number, Part I 5) Transformer codes (if the amp doesn't have date codes on the tube chart) . We have yet to find an amp with a potentiometer mounted there and no schematics that we have found to.
- Jul 17, · Rare / Fender Showman COMBO!? Discussion in 'Amps and Cabs' started by alschnier, Jul 17, Jul 17 Even developed his own amp line. Steve Cropper was known to use them for just ultimate clean tone. Tranny codes date '60, and ' One pot is ' What does the solder-joints look like? The inside?
- I have a Twin Reverb amp that I am trying to put an exact date on. Easiest dating is with number on transformers, second is number on pots. . It is the date code on the transformers and the INSIDE of the chassis that will.