cbueche wrote:
WillyKirsch wrote:
Hello All!!
I found that some Tube amplifiers has an standby switch, that cuts B+ to the tubes, why this design (that's obviously works) hasn't it?
Also, May I mount the 7806 regulator to the metallic chassis instead of on a heat sink? with the needed electric isolation... there is a lot of metal to dissipate heat!!!
Thank you!!
Hello Willy,
I asked myself the same B+ delaying question. I even bought a
small pcb kit to delay the B+ (I use solid-state rectifiers). However, I have read in this long thread that the designer Bruce founds it unneeded, so I skipped it. I might add one in another build I'm planning for this amp. But first I have to solve my hum issue. Sailing season is beginning here so my attention is shifting to it until Fall (amps are a winter hobby for me).
The PCB I'm using is quite compact and doesn't allow large heat sinks. Consequently, mine gets pretty hot, but not too much. If your physical design allows to mount it on the chassis (properly isolated), I wouldn't see an issue and you would certainly get better cooling and less heat inside the amp.
Regards,
Charles
Thanks for your response Charles!!!
I forgot that the B+ delay was mentioned in the thread... there are so many pages!!!
I'll get rid off the heat sink, I tend to complicate simple things...
Sailing!! Nice!! I agree, audio its a winter hobby, I passed all the summer outdoors even in my backyard!!
Good winds!!!