Unless you have and want a museum piece, it will need new / increased power supply caps and resistors, fresh cathode bypass caps, and a new volume pot. Harmony Central Review Maestro Reverb/Echo Combo Rate the GA-1RVT... 16W 1x12" Guitar Combo with Reverb and Tremolo Speakers: 1x12" Inputs: Channels: Volume Controls: Tone Controls on Each Channel: Tremolo: Yes Reverb: Yes Tubes: 8 (Pre (4x6EU7, 1x12AU7), Pow (1x6V6 PAIR 5Y3)) Extension Speaker Jack: Monitor Jack: Watts Output: 16 Shipping Totals: Schematic with 4x 6EU7, 1x 12AU7A, 2x 6V6GT & 1x 5Y3GT (Gibson) I have one of these. The controls were mounted on a slanted panel at the upper rear and consist of: 2 inputs, volume control, fuse holder, on/off switch and a jeweled pilot light. I've currently got a boogie blue angel to satisfy my need for blue tone, but I'm gonna miss my kick'in lil GA-5. simply gets it done with more authentic tone and half the parts.If you like the sound clean and round, change coupling caps to .1s, .05s for edgier, 'twangy' sound. Single-ended / Class A circuit; 12AX7 pre-amp, 6BM8 output with the front triode section operating the Tremolo function, and a 5Y3 rectifier. Reverb: Yes Tubes: 4 (6EU7, 7199, 6BM8, 5Y3 or Pre (1x7100, 1x6EU7, 1x6BM8 5Y3)) Extension Speaker Jack: No? 16W 1x12" Guitar Combo with Reverb and Tremolo Speakers: 1x12" Inputs: 2 2 Channels: 2 Volume Controls: 2 Tone Controls on Each Channel: 1 Tremolo: Speed, depth Reverb: Yes Tubes: 7 (4x6EU7, 12AU7, 2x6V6, 5Y3) Extension Speaker Jack: No Monitor Jack: No Watts Output: 16 Shipping Totals: 1961: 396 I have one my father bought in 1961. (John King's web-site) The sound with a Les Paul Deluxe was awesome. I had many a good gig with my friends with it cranked with an Ibanez screaming through it without going deaf. Did I mention that it weighs something like 10 lbs.?Remember, your amp is newer than the newest component.For example, if you find pots from late ‘64 and transformers from early ’65, you can be pretty sure your amp is a 1965.14-16W 1x12" Guitar Combo with Reverb Speakers: 1x12" Inputs: 2 2 Channels: 2 Volume Controls: 2 Tone Controls on Each Channel: Bass, treble Tremolo: No Reverb: Yes Tubes: 7 (3x6EU7, 12AU7, 2x6V6, 5Y3) Extension Speaker Jack: No Monitor Jack: No Watts Output: 14-16 Shipping Totals: 1961: 135 Harmony Central Review GA-15R Rate the GA-15RV Maestro (tweed)... Shipping Totals: 1959: 1421 Harmony Central Review GA18 Explorer Rate the GA-18 Explorer (Tweed)...
Well, this universal “truth” was debunked when we found a bunch of amps with transformers made by the Better Coil and Transformers company.
Some things are very obvious such as non-original or reconed speakers, non-original transformers, replaced pots, re-tweed, re-tolex, re-grill, etc.
and these changes are often disclosed and of a non-malicious nature.
The following chart, was originally printed in VG magazine, by Gerald Weber.
If you see any data that is not listed here or notice any errors, for 1970’s and earlier Fender amps, please send us an email and we will update the chart.