Dating fender amps


However, it should be a 12AX7 with plenty of gain. Although his job was somewhat limited, his recollections provided some really fascinating insights to how the amps were built. Tweed refers to the two-tone woven fabric that covered many early amplifiers. Reverb amps will also have an additional 12AX7 to reamplify the output from the spring. How can I find out how old my amplifier is? Dating fender amps [PUNIQRANDLINE-(au-dating-names.txt)

Most push-pull Fender tube amps have a tube bias adjustment inside, which varies the idling current in the power tubes all at once. Bias should be adjusted when tubes are replaced. Matched pairs are recommended to keep the amplifier balanced from side to side -- if you amp uses 4 or more output tubes, you can use groups of matched pairs, and you dating fender amps not necessarily need to buy a matched quartet, sextet or octet.

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. It is VERY dangerous to blindly plug different tubes into a guitar amp. If you have a later silver-face or blackface Deluxe amp, the plate voltage will be very high--plugging low-cost Russian or Chinese 6V6s into dating fender amps an amp is risky.

Note: Since this article was written Tung-Sol, Electro Harmonix and JJ Electronics have released 6V6 tubes suitable for high plate voltages making them a great option for these amps. Many earlier Fender tube amps used rectifier tubes. These were almost always at the extreme left of the chassis, when looking at the rear of the amp.

DO NOT blindly swap different rectifiers, some consume more heater power than others and might damage the amp. Aftermost Fender tube amps switched to solid-state rectifiers, until recent Custom Shop models reintroduced tube rectifiers.

How can I find out how old my amplifier is?

Solid -state rectifiers do not wear out as tubes do, nor can they be replaced by the user. The solid-state diodes used in older Fender amps are rather primitive compared to modern devices--if you wish slightly better performance, suggest speaking to a service technician about replacing the diodes with modern fast-recovery epitaxial FRED diodes.

Some early Fender 6L6 tube amps can use any of these types. Finally, meant a special high-quality tube in the past--it no longer means much today. True NOS s are scarce and costly. If polyamory dating australia really want to know the differences, we recommend you consult past issues of Vacuum Tube Valley magazine.

In all cases, if you are not certain which amplifier version you have, do not experiment! You might damage the amplifier and the tubes. See an experienced technician. Click a Fender tube amp in this list to jump to its description below Any 12AX7 type will work dating fender amps. NOS s recommended if lower gain is desired. Power tube middle socket is 6V6. Recommend using glass 6V6GTs.


NOS metal 6V6s run too hot. DO Dating fender amps use other types. Rectifier tube is 5Y3GT. Avoid using NOS metal 5Y3s, only glass. You may also use 5V4 types or 5R4 types if they fit physically. Inexpensive Russian 5Y3GTs are readily available and suitable. Second tube-- 12AX7 specified. This is the vibrato tube. Power tube is 6V6.


A low-noise, low- microphony 12AX7 or is recommended. Second tube is a 12AX7. This is the phase inverter and vibrato tube. This tube need not be low-noise or low-hum, nor does it need to be tested for microphony. It must have good quality heater insulation.

We understand that some technicians recommend Ei or Preferred Series for this duty. Power tubes are a pair of 6V6. Recommend using matched pair of glass 6V6GTs. This tube should be of good quality. Do not attempt to use 5Y3, 5V4 or 5U4 types. Second tube is the reverb driver. This tube does not need to be low in noise, however it should have good quality cathodes in order to handle the load.

This tube tends to wear out faster than the other preamp tubes. The biggest tip off would be the control panels which brings us to interesting factoid 2, dating fender amps. After CBS bought Fender in Januarythere were still plenty of control panels for various models that were in stock. Fender must have had a million of these labels printed up since they appear on Champs and Vibro Champs well into Okay, now on to the dating-by-number stuff.

Some of the trends are really obvious. The early amps woodie and tweed had serial numbers handwritten on the tube chart. For example, the serial numbers for 5F6 and 5F6-A Bassman amps run from BM to BM therefore we can dating fender amps that there were about 4, units made.

How about those rarebird Vibroverbs? The brown Deluxe is less common at about 4, units made serial numbers run from D to D Anyway, you get the idea. For instance, the serial numbers for tweed Dating fender amps 3x10 run from S to S Remember, this model shares a chassis with the narrow panel tweed Pro and Super.

Dating Fender Amps

Therefore, the only thing we can infer is that there were 3, tweed Bandmasters, Pros, and Supers made in total.

DATING The tables are pretty much self-explanatory, but here are some guidelines to keep in mind when using the tables to date your amp.

Dating Fender amps by Chassis Serial Number

First, the tables should be used as a guide only. Large overlaps in years may be due to lack of sufficient data late s to mid s or simply that the stamped chassis were used way out sequence mid s to early s. Thankfully, these aberrations dating fender amps pretty rare. Some serial numbers have a letter prefix plus 4-digits instead of the usual 5- or 6-digits.

Likewise there are some serial numbers with an extra digit usually a zero after the letter prefix. Again, these are rare and exceptions to the norm. Same goes for Princetons made after On early amps, this material was dating fender amps to make it a more durable covering.

Several different types, in vertical and diagonal weaves, were used. Although the dates derived using the charts below will likely be a good approximation, they should not be considered exact.

This sticker is a chart that shows the types of tube types used and the order of their physical location in the amplifier, and may be rubber-stamped with two-letter date codes that denote the year first letter and month second letter of production.

These stamped letters may appear in various positions on the chart. If three digits are present, the first digit refers to the year i.

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