Well, actually, this was a science fair project for my 14yo son. His goal was to create a tube amp from salvage and new parts for less than $100. He built the amp, starting with a Hammond Organ power amp purchased on ebay, then using schematics from the web and some pretty good engineering skills, turned it into a heavily modified guitar amp. I supervised and gave him some pointers, especially on the safety aspects, but for the most part this is his amp. Overall, we have about $75 invested, which includes new tubes, though its evident here that the originals still have life.
In the video, he plays my 1975 M75 Bluesbird for the initial trial run, using a PODxt as a preamp. This was straight out of the box so to speak. The video is basically a before and after type thing. So the first part, we were just seeing what we had to make sure it would be worth the effort.
The latter part of the video shows the latest version, with a dual channel 12AX7 pre-amp, heavily modified phase inverter section and minimally modified power section, feeding a 1x12 cab. He rebuilt the power section, recapped all the Electrolytics, preserved only the Power Transformer and some resistors, added switches, lamp, fuse, grounded cord, etc. The output tranny is 4 ohms, here the amp is feeding an 8 ohm EV12L loaded tuned port speaker cab, so that is the next part of the project - a head cab and a 4 ohm speaker cab.
He plays my '73 S100 for this section. He has been building his own pedals for a while now, but this is the first time he tackled something like this. Now he has the bug.
http://www.youtube.com/watch?v=ngF3IehSEU8
Craig
In the video, he plays my 1975 M75 Bluesbird for the initial trial run, using a PODxt as a preamp. This was straight out of the box so to speak. The video is basically a before and after type thing. So the first part, we were just seeing what we had to make sure it would be worth the effort.
The latter part of the video shows the latest version, with a dual channel 12AX7 pre-amp, heavily modified phase inverter section and minimally modified power section, feeding a 1x12 cab. He rebuilt the power section, recapped all the Electrolytics, preserved only the Power Transformer and some resistors, added switches, lamp, fuse, grounded cord, etc. The output tranny is 4 ohms, here the amp is feeding an 8 ohm EV12L loaded tuned port speaker cab, so that is the next part of the project - a head cab and a 4 ohm speaker cab.
He plays my '73 S100 for this section. He has been building his own pedals for a while now, but this is the first time he tackled something like this. Now he has the bug.
http://www.youtube.com/watch?v=ngF3IehSEU8
Craig
