This tube need not be low- noise or low-hum, nor does it need to be tested for microphony. You have to make that call. And many people ask me to try and determine the year of their old amplifier, or to help them with the year of their older off-brand electric guitar. Anyway, with it came the original speakers which are both dry as the desert sand and torn. That volume issue is one result of weak caps, ime.
Second tube is second channel preamp, is specified. Great sounding cone breakup when pushed. The actual power ratings have been published in several books so I'll discuss them in general terms here. This is severe duty and will use up the tube's cathode quickly. The list, presented below, is based on our actual observations, but is not comprehensive.
- Leo Fender was notorious for tweaking circuits and the results of some of his tinkering can be found on late examples of an amp prior to the switch to a new circuit.
- And keep those blackface amp data coming!
- Either the factory worker was asleep at the wheel that day or there was a new hire that was still learning how to assemble amplifier circuit boards.
- Princeton and Princeton Reverb.
Smooth high end, punchy lows no farting out at all and nice upper mid range emphasis. Common Fender Source Codes. And remember, dating in spain even the dates indicated by the pots aren't that exact.
Fender Oxford 12T Speaker
Of course, the most foolproof way is to pull the chassis and look at the layout. On popular Fender models, the pot date can be very close to the actual date of the instrument. Many earlier Fender tube amps used rectifier tubes. We understand that some technicians recommend Ei or Preferred Series for this duty. The last two digits would refer to the week of the year i.
This necessitates removing the chassis from the cab to change the voltage setting which would only be a problem if you hopping from country to country with the amp. These mistakes were merely cosmetic. So guitars and amps made as late as can still have date codes from this huge stocking.
Dating Fender amps and speakers
- It's no wonder that watt Twins easily shredded a pair of them.
- Also, the different component values could be due to a necessary substitution on the production line when a particular value was out of stock.
- Twelvefrets, I am not familiar with that code.
Utah went on to become Pyle of Radio Shack and car audio fame. Vibrolux and Vibrolux Reverb. The author and his partners would like to thank those people who have sent us Fender amp information and you know who you are dahlings. National, Valco, dating with hubby Supro Amplifier Products.
Dude, that speaker dating seems to be right in line with the other codes in the amp, imo. Well I'm not one to leave you out in the informational cold, so here's something that I use quite often in dating amplifiers and electric guitars. That is, the Oxfords won't be heard. Jason, ime, those low efficiency Oxfords don't perform matched with anything except another speaker that has a very simular efficiency rating. Earlier Oxfords can be excellent speakers.
If it's a one-digit number you need to determine the correct decade of the amp some other way. Third tube is the Normal channel preamp. The amps during this period could have the earliest style silverface grill cloth or the more familiar silverface grill cloth. Most push-pull Fender tube amps have a tube bias adjustment inside, dating which varies the idling current in the power tubes all at once.
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As a result of the price wars, they had figure out how to make the speakers produceable with a very low reject rate as well as use less expensive parts, i. Gibson used some pots with strange codes during the s that were confusing. It may have been some time before the part was installed at the factory, but it still provides a good approximation of when the gear was made. Solid-state rectifiers do not wear out as tubes do, nor can they be replaced by the user. Jensen speaker models denote their approximate power handling capacity and magnet type.
Help dating Utah speaker
These were almost always at the extreme left of the chassis, when looking at the rear of the amp. Many times a player can find an original speaker to replace the non-original speaker. This is the phase inverter and vibrato tube. This tube need not be low-noise or nonmicrophonic.
Second tube is vibrato channel preamp, is specified. That could explain why they sound good. One clue that can be used is the ink stamped chassis date code that is usually located in the chassis, but is sometimes found on the underside of the chassis behind the tubes. Fourth tube is the driver.
Interestingly, these amps have Triad power transformers while concurrently produced domestic models had Schumacher units. Also, the amp eats power tubes, does not have much headroom and breaks up early. Sometimes there just isn't enough information on electric instruments and amps to allow them to be properely dated. No, create an account now. The higher the letter, internet dating scams the higher the power rating.
This is the driver stage and gain makeup stage. Fender began using Eminence speakers as standard in nearly all of its tube amps beginning in the early s. There is a strong market for used speakers. Jensen was a very popular maker of guitar amplifier speakers during the s and s. Fifth tube is the vibrato tremolo oscillator.
Although the cosmetics changed, the circuits remained unaltered from the blackface circuits on the earliest silverface amps. If three digits are present, the first digit would refer to the year i. Not a bit of harshness in these as compared to other new speakers. Often the differences are minor such as small changes in resistor or capacitor values.
Third tube is the driver and vibrato oscillator. These amps do not have a bias trim pot. Second tube is the driver and vibrato tremolo modulator. 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.
This tube need not be especially quiet, but its heater-cathode insulation must be very good. It can be stamped or marked on any product to identify the production source vendor and date of manufacturer. Note the different position of the markings, even on pots from the same maker. The Code on the tube chart of your Fender Amp is made up of two letters.
Oxford Speaker Identification
Small amps like the Champ had one power tube and no bias adjustment. If so, you can check the pot or speaker for the source-date code, and determine an approximate age from that. Sixth tube is the phase inverter and vibrato tube. What I'm saying is that pot and capacitory date codes are not a reliable indicator of guitar build dates. Power supply capacitors and filter caps are two names for the same thing.
These became obsolete with good Alnico magnets and weren't used much past the s. There are some other codes used on Jensen speakers, as shown below. Some amp geeks don't like the way these Fender label Jensens sound, but let your ears be your guide. Fender had tremolo or vibrato on some amps. They had a Professional series, a Concert series, and a Standard series.