vintage jensen speaker identification codes sorted by

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All during Fender's life as an amplifier maker, then used speakers made by Jensen 220 , CTS 137 , Oxford 465 , Utah 328 and Altec-Lansing 391.

I have presented my amps in rough chronological order by era.

Gibson didn't start using pots with source-date codes till 1953 or 1954.

Concentrically ribbed, seamless, pulp cone.

On 4 digits date codes, the 1st and 2nd digits are the last two digits of the year.

the Champ went to 1964 Early in this era the linen grille was replaced by genuine brown grille cloth.

If your amp was intended for 6L6s, do NOT try 6V6s, you might damage the tubes.

Power tubes are a pair of 6L6GC.

NOS 5751s recommended if lower gain is desired.

4 digit date codes were used in the 1960's and later this makes determining the year much simplier! Then the parts maker like CTS would have to eat the returned inventory, or sell it off to someone that didn't care about date codes, and probably at a discounted amount.