I've done a search for the following but haven't been able to get any definitive answers, appreciate any input:
1. I have some output transformers left over from a kit, they have a 46% UL tap. Schematic and built notes I'm using suggest 43%. Is that enough of a difference to require correction?
2. I'd like to include a Triode/UL switch. Given the voltages present (350ish dc), would it be ok to use a standard 250 VAC switch, so long as the switching is done with the amplifier turned off? The last Elekit unit I built had smaller DPDT toggles, they didn't look like anything high voltage/heavy duty.
3. Is there an issue with using transformer mounting screws as ground points? I don't see it done so assume it may be bad form.
4. In regards to heater wiring, is there anything wrong with crossing between pins to permit twisted wires up to as close to termination as possible (please see pic)? I'll be coming from a transformer right next to the right-most socket, hence the wiring path, I was going for minimizing length and avoiding input signal path.
1. I have some output transformers left over from a kit, they have a 46% UL tap. Schematic and built notes I'm using suggest 43%. Is that enough of a difference to require correction?
2. I'd like to include a Triode/UL switch. Given the voltages present (350ish dc), would it be ok to use a standard 250 VAC switch, so long as the switching is done with the amplifier turned off? The last Elekit unit I built had smaller DPDT toggles, they didn't look like anything high voltage/heavy duty.
3. Is there an issue with using transformer mounting screws as ground points? I don't see it done so assume it may be bad form.
4. In regards to heater wiring, is there anything wrong with crossing between pins to permit twisted wires up to as close to termination as possible (please see pic)? I'll be coming from a transformer right next to the right-most socket, hence the wiring path, I was going for minimizing length and avoiding input signal path.
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The 46% taps will be adequate. The 250VAC rating has 350V peak, so it will be ok,
but never switch it with the power on. Don't use the transformer bolts as ground points,
keep those all separate. Check the lead dress in this original Dyna manual for good practice.
https://hafler.com/pdf/dynaco/Dyna-ST70.pdf
but never switch it with the power on. Don't use the transformer bolts as ground points,
keep those all separate. Check the lead dress in this original Dyna manual for good practice.
https://hafler.com/pdf/dynaco/Dyna-ST70.pdf
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appreciate the input, sometimes the obvious "don't do this" stuff overshadows the "it's not the best idea" concepts.