spritzer

Never call me that!!!!

I just wouldn't dare running mains through the same umbilical as the other wires. It's just so Eddie Current and so much fail waiting to happen. Call me paranoid...

What monster 12AU7's are those?

Are you sure that the channel is dead and it is not a switch issue? Measure the top of the large resistors for DC voltage. You should have roughly 0VDC between them and each one relative to ground is +290VDC. Replacement parts for the output devices are all but impossible to source. You need low Cob which is the truly hard part.

Mine will feature a double mains wiring with a separate voltage selector in the amp chassis. Only way to do it properly. Yup, Supremes.

While on the subject, the new Megatron board just arrived: Look Ma!!! Boutique caps!! Well that and a 12V filament for the front end, it's smaller and the ground plane is on both sides.

We should do a layout for this. Well that and the B10. SRPP magic or something like that...

It's been discussed but why bother. The 300V line is already regulated.

SRPP with a 300V tube...

If you want to try and fix anything...then there is this: Jecklin Float amp.... Epic clusterfuck.

It can be improved but why bother, just build a KGST.

Bypass the Elma and see what happens. Those switches are notorious for corrosion and connection issues after a few years.

Yup, that is correct.

Yes but the heatsinks are extra...

No info just yet...

Self-destruct....

If you aren't scratching your head wondering how this will all fit then DIY is just too easy. On that note, a mini Carbon is in the works...

It hasn't shipped yet which is good for me.

Good point. A KGST psu and transformer could be used with the +15V just driving the power LED. A bit more opulence just for the fun of it...

It would also be easy to use the PSU built on the KGST boards. Just use a LM7918 and use a diode to lift up the ground for -19V or so.

The Bourns 3590S are excellent and not too expensive.

Mine came from RS components. They have a huge stock so just find one which is the closest size to your preferred IEC.

Wire is almost always rated for AC. My plan for this was always to use two umbilicals, one which carries DC and the heaters (which are mostly DC anyway) and then a regular powercable to feed the amp box transformers.

I think most caps should be ok due to the rubber pad they sit on. The snap in caps don't have this but still be careful. I think you might run into some problems with seven transformers inside the amp section. Ideally you should have two of them, each with two 6.3V windings just for the CCS tubes. The rest should be in the PSU box. Also EI cores are the worst when it comes to magnetic fields which is why I'm looking into R or O cores for this.

I'm not expecting any profound difference, it's mostly that we can do away with the current limiting and that the amp will be mostly SiC fet. Including the rectifiers...