Since I primarily collect amps by Fender, and guitars by Gibson, Fender, Martin, National, Epiphone, Gretsch and Rickenbacker, I really can't help them with these other less popular brands. As you have probably noticed, there is plenty of information here to help date the brands that I am interested in. But where does that leave everyone else? 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. It's called the "source-date code", and it can help determine the approximate age of an electric instrument by the date its components were manufactured. Source-Date Codes On American made vintage gear, the pots and speakers provide an excellent opportunity to date a piece of equipment by referencing their "source-date code". The source-date code found on pots and speakers gives the manufacturer and date roughly when the components were made.
Fender Super Reverb '65 - '66 CTS \\ ceramic vs alnico speaker comparison
The remaining 3 or 4 digits are the date code. In 3 digit dates code, the 1st digit is the last digit of the year. On 4 digits date codes, the 1st and 2nd digits are the last two digits of the year. In either case, the remaining 2 digits are the week of manufacture 01 to With this in mind, remember if the last two digits of the source-date code are greater than 52, you're not looking at the source-date code!
Stackpole for example converted from three to four digit date codes in late On 3 digit date codes, you have to "guess" the decade of the pot or speaker. Usually this isn't too difficult.
Pots used by Fender. The pots on the left and right are Stackpole pots manufacture Note the different position of the markings, even on pots from the same maker.
Left: The source-date code on a speaker.
In this case, the speaker is made by Rola in the 9th week of The decade, though not directly shown by the source-date code, was easily determined because this particular amp was only made during the s. Note the font style of the source-date code number always seems to be the same, for all speaker manufacturers.
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Right: Same thing here. Jensen speaker made in the 41st week of Pot Source Codes. During the 's, Fender used mostly Stackpole pots. Then in roughly earlythey changed to CTS pots. This supply lasted for over five years.
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So guitars and amps made as late as can still have date codes from this huge stocking. Till aboutJensen was the only Fender speaker supplier.
Then from and later you see Fender using speakers from all the above mentioned makers. National, Valco, Supro Amplifier Products.
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Note the use of "" as a source code on these products. Actually, it's not a source code but is a manufacturers code for all National, Valco, Supro products.
Found as second stamping on speakers as a date code XXX from through the 50's and 60's all the 's amps are generally field coil Rola spkrs. Manufacturer Source Codes.
Oulfa, site de rencontre amoureuse et serieuse Pour les celibataires a la quete d'amour. Grace a la qualite de Dating Cts Speakers notre service et de Dating Cts Speakers notre methode, trouvez enfin l'homme Dating Cts Speakers ou la femme celibataire de vos reves! Faire une rencontre serieuse n'est Dating Cts Speakers plus qu'a quelques clics: inscrivez-vous sur le SITE DE. CTS: CTS (Chicago Telephone Supply!) speakers were used occasionally in Fender amps until the mids. These are good quality speakers that tonally lie between Jensens and Oxfords. The alnico inch CTS speaker was the most prevalent speaker in Super Reverbs from . Jul 29, CTS ; Altec Lansing ; Electro-Voice ; Pyle ; Weber VST You also mentioned that you're looking for a speaker option that decreases the overall volume of your amp. You need a speaker with a lower audio output, so you should consider the spec known as SPL, or sound pressure level (sometimes called sensitivity).Author: Jeff Bober.
Below are many manufacturer source codes which are the first 2,3, or 4 digits of the source-date code. Prior to the re-structuring of Jensen in ''72, Jensen quality had suffered terribly.
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When Rola started to make speaker for Jensen inRola initially used the Jensen manufacturer code, but by the end of changed to the Rola code. Other Speaker Manufacturers thanks to P. Bechtoldt and H. With all this information in mind, can you identify the following manufacturer and date of these source-date codes? Can you see why? If you can't, read the above information again!
Dec 02, Kustom used CTS speakers in the early '70s as did numerous organ manufacturers. It's a shame the ribbed cone alnico magnet 12" speakers found in organs in the early '70s didn't make it into Fender amps. Not as original parts, anyway. Vibrolux59 and Wally like this. Dec 2, #7. Mr Ridesglide Friend of Leo's Silver Supporter. Unfortunately on some older Jensen speakers, the year is only represented by a single digit (just "7" for example). In that case, you will have to make a guess as to the decade in which the speaker was produced (, , , etc.). If your speaker is in its original amplifier, you can make an educated guess using information from your amp. Make Offer - PAIR of Vintage CTS 12" Woofers Speakers 8-OHM from FENDER BASSMAN Vintage CTS 8" SPEAKER Date Code=N Reads Ohms $
Jensen was a very popular maker of guitar amplifier speakers during the s and s. Fender and Gibson used them, and did many other makers. There are some other codes used on Jensen speakers, as shown below. The first set of codes shows the type of magnet, size and quality of the speaker. The "P12R" identifies the type of magnet, the size, and the quality of the speaker.
The prefix code letter identifies the type of magnet used in the speaker. Prior to the s, Field or ElectroMagnetic magnets were used. Instead of a permanently magnetic magnet, electricity was used to make the magnetic field.
These became obsolete with good Alnico magnets and weren't used much past the s. For the best guitar tone, it is generally agreed "permanenent" Alnico V was the magnet of choice. AlNiCo was the mainstay for decades because it produced a strong magnet which worked great in speakers.
It was largely discontinued because of higher cost compared to newer materials there are other rare earth metals now, such as samarium-cobalt and neodymium-iron-boron aka NIB that are now often used.
Feb 17, CTS made the 46th week of ' I have 2 of these and they came from an old Fender PA column. My speakers are 68's. 32 ohm. If I ever use mine, I'll probably get them reconed to 8 ohm. I really didn't add anything but responded just for support.
Also Ceramic magnets were cheaper to make than Alnico, hence their usage in the s instead of Alnico. At some point in the s Jensen stopped using Alnico V magnets and used ceramic magnets instea but kept the "P" prefix! Jensen made speakers from 4" to 18" sizes.
The suffix code letter identifies the quality of the speaker. I have a Deluxe Reverb and am trying to figure out if it has a Utah or some other kind of speaker.
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Any speaker ideas on that front? I also have one of the newer Fender Pro Reverb amps with an effects loop and a silverface Twin Reverb with a volume control.
Both amps produce very loud hum whether or not a guitar is plugged in. Could this just be bad caps? Or is there some other possible cause you can point me to?
Most factory speakers in Fender amplifiers have what is known as an EIA code that specifies their manufacturer. The format may look like this:. Here the number designates the speaker as a Jensen, and indicates a production date of the 37th week of or Fender has used only a handful of different speaker types over the years.
This should help you identify your speaker.
You need a speaker with a lower audio output, so you should consider the spec known as SPL, or sound pressure level sometimes called sensitivity. The SPL rating specifies how loud a speaker is at a distance of one meter when driven by one watt. The higher the number, the louder the speaker. You mention the Celestion Gold If you want the least volume from your amp, search for a speaker in the style you like with the lowest SPL rating.
Oct 29, I used a pair of CTS 15"square magnet bass speaker model 15G54B 8 ohms back in the 70's and they were "The Bomb", Frequency range 40 Hz. 2 1/2" voice-coil w/ large paper dust-cap with breather hole in the center and the 60oz. square magnets; Great low end, great mid and upper mid roll-off, just right IMHO! Amp Model: Amp Config: Speaker Configuration: Replacement Speakers: Vibrolux Rev, Sil ' L6 Fixed Bias 40W: ", 8 Ohm CTS AlNiCo, Oxford 10L5, Rola. All during Fender's life as an amplifier maker, then used speakers made by Jensen (#), CTS (#), Oxford (#), Utah (#) and Altec-Lansing (#). Till about , Jensen was the only Fender speaker supplier. Then from and later you see Fender using speakers from all the above mentioned makers. National, Valco, Supro Amplifier.
Another option you might consider: Eminence eminence. It might be worth checking out.