Super 6G4A First tube is first channel preamp, 7025 is specified. Either way, again allow me say: score of the year right here. Super 6G4 First tube is first channel preamp, 7025 is specified. This is the driver stage and gain makeup stage. This mod is not applicable together with the Pull V1 mod, as you need the normal channel preamp tube. For example, if your silverface super reverb has transformer codes all from 1974, it was made in 1974! But only if you know how to tame this beast. Here is what the neck date and body date look like from a 1952 Telecaster: If you're not comfortable removing the neck of a guitar to peek at the date marker, I encourage you to take it to a local tech or luthier.
These dates will tell when the original part was manufactured, but are not exact indicators of when the guitar was actually put together and finished. If you are like most players and only use the Vibrato channel reverb, tremolo, the bright cap and the extra gain stage , you should pull out the V1 tube. The following charts are the revised dating tables for Fender tube amps. These have not been observed or reported so the answer remains unknown. Larger amps had two or four power tubes in push-pull, which work like a see-saw -- when one tube is decreasing in voltage, the other is increasing. Though examples also exist with the number on the headstock or the neck-plate in the case of certain early reissue models.
With all this information in mind, can you identify the following manufacturer and date of these source-date codes? The earliest version had 12 coupling caps. Fender production did not care too much if the amp left the factory in Dec or Jan. We also have some other blog posts related to Fender that can hopefully be of some help. 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 such an amp is risky. The following list, compiled by Greg Gagliano, establishes dates through 1976: A00100 to A01200 - 1964 A01200 to A04300 - 1965 A04300 to A07000 - 1966 A07000 to A10400 - 1967 A10500 to A11300 - 1967 A10500 to A16500 - 1968 A16500 to A21400 - 1969 A21400 to A25600 - 1970 A25600 to A37000 - 1971 A37000 to A50500 - 1972 A50500 to A68000 - 1973 A68000 to A99999 - 1974 A81000 to A99999 - 1975 B01000 to B15000 - 1975 B15000 to B68000 - 1976 If these steps are unsuccessful, a number of books have been published that help to date amps based on part codes.
This also means that various parts used on a particular guitar may have come from different points in time, so no single number can absolutely define when the instrument was built. I estimate the 2 amp types total 9,500. It must have good quality heater insulation. I estimate about 5700 were made in total. C copyright Andrew Waugh 2004-2019. If so, read more about the cap in the next bullet point.
Does anyone here have any insight on this? If three digits are present, the first digit would refer to the year i. That dispels the 68-69 idea above. Filter caps are only visible in schematics. After 1968, most Fender tube amps switched to solid-state rectifiers, until recent Custom Shop models reintroduced tube rectifiers. For amps with reverb you could use the reverb footswitch phono plug if you are not using it. Sell Your Gear on Reverb Made in Mexico Fender Serials Fender opened a factory in Ensenada, Mexico in the late '80s and instruments started coming off the line in 1990.
The Stage Lead and Studio Lead have turned up in roughly equal numbers in my survey, but it's a small sample so make of that what you will. Some early Twin Reverbs have tube charts specifying 7355 power tubes. This mod is relevant only for two-channel amps with normal and vibrato channel. And now for an important update! Most importantly the tone gets rougher and rawer with more mids and higher frequencies, aka presence. Some are listed on Fender's website. 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. For Fender during the turning point era of the mid-'60s, check out Body and Neck Dates Through much of Fender's production history, Fender workers would print or write a production date on both bodies and necks where the two pieces meet.
These were almost always at the extreme left of the chassis, when looking at the rear of the amp. 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. If it's a one-digit number you need to determine the correct decade of the amp some other way. The speaker codes are in the form 109xxxx or 67-xxxx; the transformer codes are 606-xxx. Diode rectifier — More clean headroom.
It could possibly have left the factory in late 1969 or early 1970. Stuff Like This is Never Complete or Totally Accurate All these amps have serial numbers beginning F2, F3 or F4 followed by another 5 digits. At the end of a restoration, it will probably not be worth what would be spent. If you clean it up, do all the work yourself, and buy it cheap, you can get a great amp that will bring decades of enjoyment. In all cases, if you are not certain which amplifier version you have, do not experiment! Solid-state rectifiers do not wear out as tubes do, nor can they be replaced by the user. This is no different with published dating tables for vintage Fender guitars and basses. Then comes the March 1985 management buyout, when the new owners were left with some parts but no factory! Well, for the 4-digit serials affixed on a foil sticker, numbers as low as 0127 and has high as 3765 have been observed.
After a short period of overlap with the old system, the post-76 numbers will start with a letter that indicates the decade, followed by a number that indicates the year of that decade. Use the latest one to give you a good idea of when it was made. I have an original 2 ohm setting on my bench. Just exactly as indicated in the blog post above. If you really want to know the differences, we recommend you consult past issues of Vacuum Tube Valley magazine. Thanks to everyone who sent information about their amp s. Esquires, Broadcasters and Telecasters shared a serial number sequence, while the landmark Precision Bass had its own system.