My Handbuilt 6550 / KT88 Dual Rectified Amplifier - Demo both clean and pushed into Sag
For fans of vintage tube goodness here is a demo of my custom built 6550 tube amp. I've owned this for quite a few years and it was hand-built by any amazing musician tech who sadly was losing his sight and had to get rid of most of his gear.
The amp uses a rare vintage circuit that is similar to the lat 1950's Tweed Twin with a pair of rectifier tubes. here is the lineup:
(3) 12AX7 (or any similar 12 volt preamp tube) (2) 6550 / KT88 tubes (or you can straight swap 6L6GT's or even 6V6's) (1) 5U4 Rectifier tube (1) 5Y3 rectifier tube
The amp controls include the following: - Preamp gain - Bass and Treble tone controls (on a concentric pot) - Volume - Midrange tone control - Presence control
It also has a traditional "hum" control pot but it never seems to hum much to me so I leave it alone.
There are two 1/4" output jacks -0 one for 8 ohms and one for 16 ohms.
It has a single 1/4 input on the front of the amp and a green indicator light.
The sound can be incredibly clean depending on what preamp tubes especially the one in the first position. But when you turn up the preamp gain the rectifiers are pushed into amazing sag that can be saturated enough to be similar to a vintage germanium fuzz circuit but mostly just sounds like sweet output tube drive.
- 1971 Audio Guild 1x12 Tube Combo With True Vibrato In Okc For $350
This seller is offering one of the Audio Guild amps (similar to a Magnatone) for $350. This one looks to be in very nice shape. These have the full, rich, Hi-Fidelity guitar tone associated with Magnatone and Panoramic amps and it also has...
- Nice 1965 Gretsch 6150t Combo Tube Amp On Ebay For $389 Bin
Very desireable little amp in nice original condition. These are similar to a Vibro Champ but much much harder to find and the BIN on this one is a decent price. Personally, I'd take one of these over a Champ any day of the week. Seller is a guitar...
- Vintage Silvertone 1301 Tube Amp Combo In Portland Or For $220
Here is a neat waaaaay old Silvertone tube amp from the Valco/Chicago built era (pre-dates the Danelectro made Silvertone amps) in pretty good all original condition. If you like the sound of these old amps (and they do sound sweeeeeet) you'll...
- Fender Champ 25 In La Los Feliz Area For $150
These are fairlyunknown nice loud little hybrid tube amps. The 12AX7 is basically the phase invertor and it uses a pair of 6L6GT power tubes and a 12 inch speaker so this is really closer to a Deluxe Reverb than a Champ. Voiced for power rock and Metal...
- Ampeg J-20 Hand-wired Tube Amp For $385
These have been discontinued by Ampeg - 20 all tube watts and tube tremolo. Originally sold for $699... then $599... then $499... just never really caught on. Apparently these are quite good amps - made in Korea by hand - have nice solid Birch cabinets,...