There's one for auction on eBay here. Twin 7591s, solid state rectifier, 30 watts out with two channels (no switching), tremolo / reverb on channel 2 and an extra 'shaping' control for the tremo, separate brightness switches in each channel, Master Volume, and a choke in the power supply. Similar to the mid-60's Gibson GA30 except with trem but 8" not a 10" speaker. The several members who own or have played them say they are great-sounding amps. This isn't the cleanest example but ....
Original (or in-period replacement) 12" Jensen 'EM'/Concert-series and 8" CTS ceramic speakers:
Sides banded with aluminum and particle board cabinet covered with wood-grain shelf paper:
Some discussion about the ...
of Guild reverb
Once upon a way back when, there was the Guild-Peg 98RT:
.... which used Ampeg-esque two gain stages and a coupling capacitor ahead of the reverb can. V2A and V3A (left sides) increase the signal strength to drive the reverb can (magenta line), V3B (right side) recovers and amplifies the reverbed signal and sends it back to V2B (blue line) which functions as a mixing amp and sends the blended signal to V4A (green line).
The next Guild reverb amp was the T1 RVT (version 2 shown below; forward 'ears' gone from the cabinet side panels and no upper backpanel:
In the T1, Guild coupled the reverb can using the 12" speaker for impedance matching avoiding the cost of the transformer and a resistor and capacitor in series to damp the line voltage. To maximize the dry output, the T1 has a leg from the line to the footswitch which switches the 6BM8 input between the dry/line signal and the wet reverb signal; the 6BM8 and 8" speaker are 'always on' whether the reverb is engaged or not.
The version 1 Thunderbird does not have a line feed to the 6BM8 but continued coupling the reverb with the 12" speaker. Guild also moved the reverb can from the bottom of the cabinet to a 9" 2-spring 'tray' or 'pan' mounted in the chassis. The footswitch (green box) doesn't switch between inputs, it grounds out the reverb circuit ahead of the 6BM8. In the off position, the 6BM8 and 8" speaker do nothing and only the 12" speaker handles the dry signal.
A cautionary tail:
Like the T1 RVT, the Thunderbird cabinet is particle board; stable when kept dry and not exposed to lateral impact. As this stuff ages, it absorbs moisture and gets heavier and weaker. There are several instances where members having T1s or TBirds shipped to them have been .... eh ... disappointed.
The version 2 Thunderbird in more sophisticated cosmetics and up-powered with twin 6L6s @ 50 watts, and two 12" speakers ... a force to be reckoned with.
Original (or in-period replacement) 12" Jensen 'EM'/Concert-series and 8" CTS ceramic speakers:
Sides banded with aluminum and particle board cabinet covered with wood-grain shelf paper:
Some discussion about the ...
of Guild reverb
Once upon a way back when, there was the Guild-Peg 98RT:
.... which used Ampeg-esque two gain stages and a coupling capacitor ahead of the reverb can. V2A and V3A (left sides) increase the signal strength to drive the reverb can (magenta line), V3B (right side) recovers and amplifies the reverbed signal and sends it back to V2B (blue line) which functions as a mixing amp and sends the blended signal to V4A (green line).
The next Guild reverb amp was the T1 RVT (version 2 shown below; forward 'ears' gone from the cabinet side panels and no upper backpanel:
In the T1, Guild coupled the reverb can using the 12" speaker for impedance matching avoiding the cost of the transformer and a resistor and capacitor in series to damp the line voltage. To maximize the dry output, the T1 has a leg from the line to the footswitch which switches the 6BM8 input between the dry/line signal and the wet reverb signal; the 6BM8 and 8" speaker are 'always on' whether the reverb is engaged or not.
The version 1 Thunderbird does not have a line feed to the 6BM8 but continued coupling the reverb with the 12" speaker. Guild also moved the reverb can from the bottom of the cabinet to a 9" 2-spring 'tray' or 'pan' mounted in the chassis. The footswitch (green box) doesn't switch between inputs, it grounds out the reverb circuit ahead of the 6BM8. In the off position, the 6BM8 and 8" speaker do nothing and only the 12" speaker handles the dry signal.
A cautionary tail:
Like the T1 RVT, the Thunderbird cabinet is particle board; stable when kept dry and not exposed to lateral impact. As this stuff ages, it absorbs moisture and gets heavier and weaker. There are several instances where members having T1s or TBirds shipped to them have been .... eh ... disappointed.
The version 2 Thunderbird in more sophisticated cosmetics and up-powered with twin 6L6s @ 50 watts, and two 12" speakers ... a force to be reckoned with.