This is the phase inverter and vibrato tube. This is the phase inverter and vibrato tube. However for this range of amps at least, I reckon it's not just a policy of withholding company-confidential information. First, the tables should be used as a guide only. The power tubes in almost all Fender tube amps were either 6V6s or 6L6s. This tube need not be low -noise or low-hum, nor does it need to be tested for microphony. This is the driver stage and gain makeup stage.
Hit the jump to see just how old that guitar or bass really is. Good luck with the sale, but you are probably really gonna regret selling that amp. For example, if your silverface super reverb has transformer codes all from 1974, it was made in 1974! Dating Your Instrument The chart below details Fender serial number schemes used from 1950 to 1964. Same goes for Princetons made after 1966. The first two are long past their warranty period. If four digits are present, the first two digits refer to the year i. Remember, many components could have been changed over the years, speakers blow, caps dry out, transformers melt down, and pots wear out.
For instance, he confirmed our assumption that the amp chassis were put into stock after being stamped with serial numbers and that the chassis were pulled from the stock bins randomly just as with Fender guitar neck plates. This tube does not need to be low in noise, however it should have good quality cathodes in order to handle the load. It is typically in the A00000 format. This is the phase inverter and vibrato tube. It must have good quality heater insulation.
This tube should be of good quality. After which, they didn't even bother increasing the first digit; thus F4xxxxx covers 1984, 85, 86 and any stragglers from 1987. There are a lot of great vintage parts suppliers out there that may be able to help. They actually held clipboards and stopwatches to measure how long it took for me to attach various parts. I still play my lap steel every Sunday in church.
They used a code like this: 606 — 645 The date is in the last three digits, after the 606 —. These codes have nothing to do with the serial number that is stamped on the right rear of the chassis - Those numbers are posted below. If you've got an amp in this category and can supply any of those codes as well as the serial number, I would luuuuurve to hear from you. This is commonly stamped with a two-letter date code. It must have good quality heater insulation.
Bias should be adjusted when tubes are replaced. So long as one tube from each pair is on one side of the transformer, and the other is on the other side, the amp will balance. In this early period, the serial number can be found on the bridge of the instrument see image. This tube should be of good quality. Because this tube amplifies the signal from a reverb spring which is inherently microphonic , a really quiet tube is not really needed. Do not attempt to use 5Y3, 5V4 or 5U4 types. He then presumably sets about developing the fine firm which bears his name today.
Power tubes are a pair of 6V6. It is a great amp…what year? We also received a report of a tweed 5G12 Concert. People keep on referring to this 'fewer than 500' thing, especially when they're trying to sell one as 'rare', but I'm still waiting for anyone to point back to the original 'fact' of the matter! So i have a 1967 May ish made one. Chassis are expensive and bulky, so no more chassis of that type are ordered until all are used up. Fourth tube is the driver. Some are listed on Fender's website. Sixth tube is the phase inverter.
This batch's run of serial numbers starts in mid-1984, when production was fairly normal. Pro-Amp 6G5, 6G5A; Vibrasonic 5G13 First tube is first channel preamp, 7025 is specified. First use the cosmetic features to get a range of possible years. Then I read the challenge on page 245 of Teagle and Sprung's excellent book Fender Amps: the First 50 Years concerning dating the Rivera-era amps, and I decided to press on; maybe I could do, for this small range, what Greg has done for everything that came before. The remaining 3 or 4 digits are the date code. Amps from the blackface era, which have a black faceplate, were manufactured from 1963 to 1967.
After 1968, most Fender tube amps switched to solid-state rectifiers, until recent Custom Shop models reintroduced tube rectifiers. Given the modular nature of Fender production techniques, an individual neck may have been produced in a given year, then stored for a period of time before being paired with a body to create a complete guitar, perhaps, for example, in the following year. Bassman 6G6A, 6G6B These models are identical to the Bassman 6G6, except they models use solid-state rectifiers rather than tube rectifiers. The source-date code on a pot is a 6 or 7 digit code impressed into the casing of the potentiometer. I never reveal names along with serial numbers, and I'm not making any money out of this. Fourth tube is the driver and vibrato modulator.
Just exactly as indicated in the blog post above. Instead, the best approach to dating a Fender is to combine indicators from the design of the instrument, the dates found on the neck and body, along with the serial number. In the above example, the transformer was made in either 1966 or 1976, week 45. This tube should be of good quality. Not only that, but to meet Swedish safety codes, Hagström removed the external voltage selector switch fitted to all blackface and silverface export models and hardwired it internally see photos. F3xxxxx could also mean 1984.