i have been making powert traffos for the last 40 years basically for my solid state amps.....now i am making output traffos for guitar amps and tube power amps as well....
i have been making powert traffos for the last 40 years basically for my solid state amps.....now i am making output traffos for guitar amps and tube power amps as well....
I would never buy a transformer from anyone who calls it a traffo, or a tranny.
EL34 Ultralinear pp amp
this is my Shuguang EL34 pp amp, ultra-linear output, based on the Mullard 5-20 and HK Citation V amps....sounds fantastic, bass is tight and controlled which is a revelation.....
B+ at OPT center lead is 445 volts, tubes are biased at 33mA each.....so that they are idling at about 15 watts each.....
the front end 6J9 tube B+ is zener regulated....it is very quiet, no hiss, no hum......Hitachi 6CG7 LTp drivers....
solid state psu with big capacitor filtering, a common mode filter choke isolate the rest of the amplifier from the power supply, freds isolators ensures cross-talk between channels are minimized, with generous filtering psu ripple is held to a minimum.
testing and setup:
fixed biasing with about 33mA on each cathodes put the tubes idling at about 14watts at idle....
using my power monitor:
line current draw is shown:
true power consumed at idling:
apparent power draw:
line frequency:
line voltage:
under the hood:
this is my Shuguang EL34 pp amp, ultra-linear output, based on the Mullard 5-20 and HK Citation V amps....sounds fantastic, bass is tight and controlled which is a revelation.....
B+ at OPT center lead is 445 volts, tubes are biased at 33mA each.....so that they are idling at about 15 watts each.....
the front end 6J9 tube B+ is zener regulated....it is very quiet, no hiss, no hum......Hitachi 6CG7 LTp drivers....
solid state psu with big capacitor filtering, a common mode filter choke isolate the rest of the amplifier from the power supply, freds isolators ensures cross-talk between channels are minimized, with generous filtering psu ripple is held to a minimum.
testing and setup:
fixed biasing with about 33mA on each cathodes put the tubes idling at about 14watts at idle....
using my power monitor:
line current draw is shown:
true power consumed at idling:
apparent power draw:
line frequency:
line voltage:
under the hood:
Hi Sir, I just to watch this post about Photo Gallery and found your monster amp. I remember the Wavac from Nobu Shishido. I am interested in build this monster in the next years. And I need your experience if is possible to say or get. The transformers, the diagram circuit the topology. Receive the most great congratulation.
this is my Shuguang EL34 pp amp, ultra-linear output, based on the Mullard 5-20 and HK Citation V amps....sounds fantastic, bass is tight and controlled which is a revelation.....
B+ at OPT center lead is 445 volts, tubes are biased at 33mA each.....so that they are idling at about 15 watts each.....
the front end 6J9 tube B+ is zener regulated....it is very quiet, no hiss, no hum......Hitachi 6CG7 LTp drivers....
solid state psu with big capacitor filtering, a common mode filter choke isolate the rest of the amplifier from the power supply, freds isolators ensures cross-talk between channels are minimized, with generous filtering psu ripple is held to a minimum.
testing and setup:
fixed biasing with about 33mA on each cathodes put the tubes idling at about 14watts at idle....
using my power monitor:
line current draw is shown:
true power consumed at idling:
apparent power draw:
line frequency:
line voltage:
under the hood:
Can we have more pictures of your power bar?
Buenísimo cappo.
Incredible **** amp.
I knew that amp from my childhood.
Pushpull 6bq5, after that further the 7591 pushpull with 32ohm out, never nobody make nothing in our big and wide country.
The two monofonici with the 211 lately realized
An externally hosted image should be here but it was not working when we last tested it.
A 12AU7 push pull output joke amplifier....
At first I just wanted to see if I could get any amount of sound out of this set-up. The circuit is a simple 12au7 up front, one triode as first audio, and then the second as a phase inversion driving a 12au7 push pull. The OPT that I used has 34k p to p and 8 ohm on the secondary. All PS caps were bypassed by 1mfd pp. The PS employed was a junkbox PT 136v and then I made a voltage doubler to step things up.
Like I mentioned in the title it was built as a joke, but turned out well for it's power capability. Here it is on the bread-board... I am not sure if I will be building this in stereo yet, as there are better things to do. I did not build from a schematic, so if you would like to try this, give me a little time to draw one up.
Also I have a audio sample for you, the link is to my youtube...
12au7 pp sample amplifier Mono - YouTube
At first I just wanted to see if I could get any amount of sound out of this set-up. The circuit is a simple 12au7 up front, one triode as first audio, and then the second as a phase inversion driving a 12au7 push pull. The OPT that I used has 34k p to p and 8 ohm on the secondary. All PS caps were bypassed by 1mfd pp. The PS employed was a junkbox PT 136v and then I made a voltage doubler to step things up.
Like I mentioned in the title it was built as a joke, but turned out well for it's power capability. Here it is on the bread-board... I am not sure if I will be building this in stereo yet, as there are better things to do. I did not build from a schematic, so if you would like to try this, give me a little time to draw one up.
Also I have a audio sample for you, the link is to my youtube...
12au7 pp sample amplifier Mono - YouTube
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