Read back through the entire thread, or search it for your favorite numbers. I have stuffed dozens of output tubes into these boards in every size from small to huge. Both of the numbers you provided have been tried, and work well. I have seen power output up to 250 WPC from 35LR6's. So far I haven't found any tubes that have a suitable pinout that didn't work. Some Vertical sweep tubes (frame output) need higher screen voltage to function, so Horizontal sweep (line output) tubes are the best choice. I am not the only one here to try different tubes.
All,
For those wanting to use other tbes than compactrons, Shanon Parks of DIY tube suggested a great idea. It keeps wires nice and short. Check it out.
diytube.com :: View topic - 5 pin pc mount sockets?
Al
For those wanting to use other tbes than compactrons, Shanon Parks of DIY tube suggested a great idea. It keeps wires nice and short. Check it out.
diytube.com :: View topic - 5 pin pc mount sockets?
Al
I have run my red board with octals and 5 pin tubes. In both cases I simply placed the new tube sockets right on top of the existing 12 pin socket and ran short wires down to the PC board. These were temporary experiments but they all worked except when I blew up an E130L.
P-P power amp design
Ok, it took a year but she's almost complete
Transformer hum as discussed here before (NZ is 230v @ 50 Hz ) but very low level, speakers are dead quiet
Just need a preamp now ( may go passive 100K stepped attenuator)
Ok, it took a year but she's almost complete
Transformer hum as discussed here before (NZ is 230v @ 50 Hz ) but very low level, speakers are dead quiet
Just need a preamp now ( may go passive 100K stepped attenuator)
Attachments
Nice work. I like your heatsink + fan approach for cooling. Makes for a clean top-plate look.
jeff
Hi Jeff
Thanks, I was very set in the clean look.
I drew the design in Autocad and had a mate run the alucobond on his CNC router (cheating I know).
I added a THERMAL FAN CONTROLLER which is adjustable
THERMAL COOLING FAN CONTROLLER
Cheers
Thanks, I was very set in the clean look.
I drew the design in Autocad and had a mate run the alucobond on his CNC router (cheating I know).
I added a THERMAL FAN CONTROLLER which is adjustable
THERMAL COOLING FAN CONTROLLER
Cheers
Hello all, here is my piece. It took me almost 2 years but with the shared knowledge borrowed from this pages I finally arrived.
Thanks to Pete Millett and to all who contributed to this thread.
The amp sounds extremelly good, no hum and a surprising amount of power in stock configuration (6GV5 tubes), it beats, both in power and SQ, more powerful amps I own, ST-70s and other EL34 type of pp.
I am going to build the 6HJ5 80w version now
.
I hope the pictures work.
Thanks to Pete Millett and to all who contributed to this thread.
The amp sounds extremelly good, no hum and a surprising amount of power in stock configuration (6GV5 tubes), it beats, both in power and SQ, more powerful amps I own, ST-70s and other EL34 type of pp.
I am going to build the 6HJ5 80w version now
.I hope the pictures work.
I second that!
Great top plate and vent Patkhan1 🙂
Yeah I was suprised by the power of the stock configuration too, the Kefs are pumping!
Yeah, Patkhan1, love the top plate. I don't suppose you did that with Front Panel Express and would care to share the drawing...
Thanks for the compliments. I cheated with the top plate, I got it from member ppp6l6gc more than a year ago. I have been trying to get in touch wit him recently, I could use some more, I can see some family and friends getting a really nice amp for Xmas.
I hooked it to a pair of Zu Omen speakers, I almost cried the first time I heard it, sooooo nice.
Again, thanks to all.
I hooked it to a pair of Zu Omen speakers, I almost cried the first time I heard it, sooooo nice.
Again, thanks to all.
Just a question....
I have a BTL bridge/preamplifier. Can the 2 outputs (Out+ and out-) be connected to the amplifier without damage? I would like to use it with a mono signal source.
I have a BTL bridge/preamplifier. Can the 2 outputs (Out+ and out-) be connected to the amplifier without damage? I would like to use it with a mono signal source.
They used to, for $45.00. He also made a very nice chasis. If you are out there, please let us know...
Ok this thread has gone a bit quiet!!
After a week on the rack I love this amp, it's really warmed up now (not sure on the exact burn in time) and the Russian caps have settled in and all is at harmony. Now for the problem; the fan is quite noisey!! Any ideas on making the fan a bit quieter???? I don't think it's the fan itself but rather the air movement, am going to turn it over tonight so that it sucks the air through from the top to bottom, not sure if it will work??
Cheers 🙂
After a week on the rack I love this amp, it's really warmed up now (not sure on the exact burn in time) and the Russian caps have settled in and all is at harmony. Now for the problem; the fan is quite noisey!! Any ideas on making the fan a bit quieter???? I don't think it's the fan itself but rather the air movement, am going to turn it over tonight so that it sucks the air through from the top to bottom, not sure if it will work??
Cheers 🙂
this has been my standby for many of years.
http://www.irv2.com/photopost/data/500/Fan_control1.JPG
just remember that if you dont use a mica pad the heatsink is live!
http://www.irv2.com/photopost/data/500/Fan_control1.JPG
just remember that if you dont use a mica pad the heatsink is live!
Have you tried it without the fan? I have the same top plate as Patkahn1 and don't need it. It appears as though your plTe should dissipate heat nicely.
Al
Al
Hi nightanole,
do you have any FrontPanelExpress files for the top plate, please let me know. This amp is so good that I plan to make a bigger one, 6HJ5 for about 70 watts, a clean top plate helps a lot in the building.
Thanks
And with this top plate you do not need a fan. It does get warm, but not very much.
do you have any FrontPanelExpress files for the top plate, please let me know. This amp is so good that I plan to make a bigger one, 6HJ5 for about 70 watts, a clean top plate helps a lot in the building.
Thanks
And with this top plate you do not need a fan. It does get warm, but not very much.
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