I am going to order custom transformers for P-P GU-50 amps,
10K CT primary, 4-8-16 Ohm secondary, 100W power 30Hz-20KHz.
Also, appropriate power transformers will be ordered.
10K CT primary, 4-8-16 Ohm secondary, 100W power 30Hz-20KHz.
Also, appropriate power transformers will be ordered.
Cobra2 said:
I hope to get decent output trannies under $70 (plus shipment).
Power transformers I believe will be under $40
World rates: http://www.xe.com/
P-545 (80W-PP)=12 000 Baht => U.S. $ 373 (pair)
not cheap, but they compare themselves among the best.
Arne K
P-545 (80W-PP)=12 000 Baht => U.S. $ 373 (pair)
not cheap, but they compare themselves among the best.
Arne K
I am lucky I did not rush to order them: actually 5K CT is needed for 100W P-P amp using GU-50 tubes.
Did you ask for custom-wound op-trafo? I guess they can make any size, as long as they can be kind-of square...
Arne K
Arne K
I've found a supplier. They want $70/each if I buy 50 of them. Shipping will cost another $560 to my address in California, so I'll have them in my garage for 81 + VAT.
Are you in for $180/pair plus actual shipment costs?
For now:
Cobra2: 2
agent.5 :2
Wavebourn: 46
Waiting one week then ordering them next Monday...
Are you in for $180/pair plus actual shipment costs?
For now:
Cobra2: 2
agent.5 :2
Wavebourn: 46
Waiting one week then ordering them next Monday...
Yes. Please also allow an ordering option for mono blocks (2 power transformers). What is the spec for the power transformer?
agent.5 said:
120V primary, 285+285V 0.6A anode, 12.6V x 2 3A filament, 100V 0.1A bias
(GU-50 filaments will run from 12'6V AC, the rest from 12.6DC regulated)
I did not find a supplier for them yet, I want to order toroids.
$ 180/pair is not to bad. But are they good? I would rather spend twice as much, if I was sure they did not end up as very expensive doorstops...
Some other projects & trafos:
In german;
http://www.jogis-roehrenbude.de/Verstaerker/GU50-Grommes/GU50.htm
a different (not japan-made) Pioneer;
http://www.elektroda.pl/rtvforum/topic558406.html
http://www.moehrenbude.de/Moehre/modules.php?name=Content&pa=showpage&pid=39
http://www.lz2zk.com/?/homebrew/pa/
http://www.realaudiolabs.com/
http://www.goldenmiddle.com/english/trans.htm
Arne K
Some other projects & trafos:
In german;
http://www.jogis-roehrenbude.de/Verstaerker/GU50-Grommes/GU50.htm
a different (not japan-made) Pioneer;
http://www.elektroda.pl/rtvforum/topic558406.html
http://www.moehrenbude.de/Moehre/modules.php?name=Content&pa=showpage&pid=39
http://www.lz2zk.com/?/homebrew/pa/
http://www.realaudiolabs.com/
http://www.goldenmiddle.com/english/trans.htm
Arne K
Cobra2 said:
Do you mean 2 power transformers?
No, I do not need a choke, I will use IRF730 to regulate screen grid and preamp power.
Looks like there will be kits available including PCBs...
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