If it is push pull, I would use 2 Output Transformers. Actually this is my favorite amplifier configuration. You can use Deluxe Reverb OT's and get either 22 or 44 watts. If you put a loop in each, you can use one side with modualtion and the other side dry or out of phase FM modulation and create a beautiful real vibrato. I have attached a very nice one. Some of the components can be jfets, this is simply an old design. Now this is a real vibrato, not even like a Magnatone where some AM is present. Love the stereo Magnatone, not dissing it at all.
This soulds like a Doppler FM modulation, very leslie like.
Peronally, even a Deluxe is often too much to turn up to 6 at 22 wattts, so truthfully my design has Cathodyne PI, but does have a 12Ax7 after which have gain pots on the cathode to determine how much signal I want on the Output Tubes. Each side is 8K to 4 ohm, 15 watt Output Transfromers. One side I added 9 pin for either 4 6V6 or 2 6v6 and 2 El84. Cathode bias all the way. I use a Edcor 275-0-275 HT with 320ma, 6.3 4 amp, 5v at 3 amp. A little overkill on the amperage, but as they say, you can never be too thin or have too many amps.
I forget which rectifier I am using, but I can assure you the circuit doesn't load down much.
I did not use build in reverb since I now have a plate unit I prefer over spring. The reason I choose the gain up after the PI is to avoid overloading the preamp and getting a Tweed Deluxe or Princeton flabby tone and the Output Iron I used is large to be considered 15 watts, but it passes bass very well.
I have added a EF86 for a glassy type tone. You may think of this as an overdrive, but it is not clipping prior to the PI. There is not really any preamp distortion, I focused on a the strongest signal without clipping in the preamp. 10 db boost will distort the preamp, but I can still get a beautiful clean and add the slighest amount of modualtion for a very full tone. 3 inputs, one for humbuckers, one for Single coils and a third for hot Pups. This is to provide the same touch sensitivity, well sort of.
I have a 2, 12 cab I have been testing speakers for this i a cabinet I build from old reclaimed pine. One side has a old Greenback and the other has an old JBL. I build these cabs with a center board like old Bassman cabs, except I make them 2" deeper and bottom port. Not important. Just throwing out ideas.
I have not put this into a chassis yet as I am still working on the Vibrato I have posted here. I am wanting to build it on its own PCB, the Vibrato I mean. Need to reduce the size.
On full bore, I prefer all 6v6, but since I have yet to use it live, I do not know how well it works, but Currently I use a AC15 with EF86 for my dry and overdrive pedals and I used AC15 values on the EF86, but recently I made the Matchless setup switchable. I prefer the Vox values, but the Matchless values make the EF86 feel firm. This one drives a Celestion Blue. My second amp is Modded Princeton with 2 10's from an old Super Reverb, CTS horseshoe I believe these are called. I have been using Wet and Dry setups since 1983 and for me in a live situation this is by FAR the best. Complete tone and volume control and easy to get it to overdrive if you want.
Neither of these amps will make much over 10 clean watts and have no master volumes. If 20 total watts is not enough, simply shoot for Deluxe Reverb voltages or somewhere in-between.
Topic: OT question (Read 4865 times)