The code usually consists of 6 or 7 digits such as where the first two or three digits is the EIA code for the manufacturer denotes CTS , the fourth digit and sometimes fifth digit denotes the year in this case it could be , 66, or 76 , and the last two digits denote the week of the year. It is important to note that parts do not always contain EIA codes, especially those parts from the late s and early s. The Ampegs made between and did not have serial numbers and must be dated in the same way as the Michael-Hull models, specifically, by finding the EIA date codes on pots, transformers, multi-section "can" capacitors, and speakers.
For example, a Duette with serial number was made in 7 , during October 10 , and was possibly the st amp made that month.
A Super Echo Twin with serial number was made in 4 , during April 04 and may have been the th amp made that month Caution is needed for dating amps from , , , and The serial numbers from these years were duplicated in , , , and , respectively. Taking the example Super Echo Twin above, its serial number alone could denote April or April A Mercury with serial number could be from September or it could be from the second serial number system implemented in Luckily, it is very easy to determine which year the first digit denotes.
The key is the model and the cosmetics. For instance, the Super Echo Twin was made in , but not in Likewise, an Ampeg from would not be covered in blue check vinyl whereas an amp from would have this covering.
An Ampeg from would be covered in navy random flair vinyl whereas an amp from would be covered in blue check vinyl. Another check for a versus a or later serial number i. Therefore, a serial number where these two digits are greater than 12 must be from the second serial number system - A final cross check with EIA dated components should remove any doubt about an made during the - 65 period.
The second serial number system was implemented in January and used until the end of This system overlapped with the previous serialization scheme for a period of about 6 months.
RARE Ampeg SN tube amplifier 2X12' Jensen speakers The first channel is not working which is the only channel with the Vibrato effect , but the second channel works and sounds great with its original set of Jensen 12' speakers. One of the original RCA tubes was not working so it was replaced, but the original is included. That works as Ampeg designed. Re tube and serviced in and very little play time since serviced. This thing has all the Tone and power you need for any band. Vintage 's Ambeg V4 amplifier Vintage Ampeg v4 for sale.
Fully functional and tested by a local amp shop. The only functional issue with the amp is that the light above the power switch is burnt out, the standby light has no issue. Very versatile and works wonderfully for guitar, bass, and synthesizers. A power usage level guage on top. It will naturally distort. Top metal panel is copper plated. It has 5 tubes. Handel on top is missing. Speaker could be replaced. Although this amp sounds dam good. Run it through a pa. System by mikeing it.
I hope you can get this amp and enjoy it for many years. Shows less than normal wear for a 40 year old amp. If you want this to sound just like a GU 12 I am told it would be a simple Mod. I love it just the way it is. Ampeg SVT classic, this amp is the real deal. Amp is from the 's. Works and plays fine. Reverb functions perfectly.
Cabinet has one 12' Speaker. Amp has a line out jack on back. Cabinet is in great shape. Shipped with UPS Ground. Head has been completely gone thru and serviced and is in road-ready condition Filters and caps have been inspected and replaced as required New chassis, as well A grounded plug was installed Everything works, including the reverb tank Great for guitar or bass for that vintage tone! Shipping Insurance will also be added. This Classic Ampeg has the tone of the 60's all tube combo.
With a Jenson 12 ' green special desigm speaker made in the usa this Amp Rock's and is ready for your next gig. This Gemini I has been to my service man for repare and had some parts replaced as you can see in the photo. Over all this amp for it's age is in shape and I tryed too show in the photos it has a new handle 3 prong plug new tubs as needed the foot switch works for theTremo and Echo.
This Ampeg Gemini I is ready for your gig. It looks real good and all channels work fine. The pictures give a good idea as to the condition. Take a look! Matching original cabinet plenty of power.
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