I've had 6C41C on wood with no heat problems. Also EL34. No problem. Because the heat fortunately goes upwards. And I can always drill cooling holes. But I was too lazy.
125C 5AR4 bottle 60C base. 110C 6V6 Tungsol bottle 50C base. That is on thick copper mounting plate. If there will be a regulator(s) in there make sure its sink sits on top with fins vertical. It can produce gobs of heat at those voltages and currents especially if a parallel type one.
Yes. Definitely I will have the heatsinks stick out the top. Perspex or something above that for safety. 😀
If you will need long enough wiring from last rectification cap to reg's input, decouple right across its raw DC input with a further one, even with much lower uF value.
Also fuse the secondary at double the CCS current target. It can save the day in case of oscillations at least during the test build phase.
I had several versions of the 12b4 prior to this. Although nice it isnt in the same league.
I am not sure what the concensus is but as far as heaters are concerned, I am going back to AC. I am currently set up with a SSLV V1 as the filament supply since I had a few laying around. The AC is simpler and quicker. FYI I have the 0dB gain version.
Rectification is solid state followed by a single 6AX4. Not enough space for another 5v transformer. And I reckoned the 6X5 would be a little fragile.
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Okay, you guys have motivated me to get mine in a case. Bas and Buzz, forgive me in advance as I am going to steal bits of your chassis design to make mine.
Here it is now, and has been for almost 6 mos. Since it is staying it is time to make it safe with a decent WAF. I will keep you posted. Looking forward to getting in the woodshop.
Here it is now, and has been for almost 6 mos. Since it is staying it is time to make it safe with a decent WAF. I will keep you posted. Looking forward to getting in the woodshop.
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How much of the circuit's quality is depending on the stiffness of the power supply? I mean, is the active regulation (and fixed heater current) obligatory for good operation?
NB Bas, are you gluing in the transformers and capacitors?
NB Bas, are you gluing in the transformers and capacitors?
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The active regulation probably takes it to the next level. But I'm starting of my listening sessions without the regulators. But Salas's SSHV2 are almost finished. And I will try them after a month of so of listening to the regular psu.