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.
Check it out:
Showing posts with label Craigslist Vintage Guitar Hunt 6550 KT88 power tube dual output dual rectifier 5U4 5Y3 Fender tweed Twin 1958 Twin 1957 twin 1959 twin am amplifier valve tubes rare handmade custom hand-built. Show all posts
Showing posts with label Craigslist Vintage Guitar Hunt 6550 KT88 power tube dual output dual rectifier 5U4 5Y3 Fender tweed Twin 1958 Twin 1957 twin 1959 twin am amplifier valve tubes rare handmade custom hand-built. Show all posts
Tuesday, August 20, 2013
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