spritzer

Why would anybody do business with Headphile?

RTFM!!!!

Purrfect!! You are not the first one to make that mistake though.

I just told Enrique by PM but I should point out that the above is 100% the wrong way of using the PCB. The pot goes on top of it with the shaft pointing where "front" is written.

Looks good. The only thing I'd change is to use male XLR's for the loopout so that is conforms to the XLR standard.

Good point.

That I truly don't get.

I know, see my post above.

That's how Pass does in on the F amps. Makes sense if neutral and live were swapped.

I use 2AT (slow blow) on 230V but I never tried anything else. No thermistors either. How are you using just one thermistor on 117V? I'd put one on each leg just to be safe. Using one on 230V works as it's in series with the windings.

A third series of Luther is due this year...

Never had it either, even on PSU's I fucked up in the design phase and had to fix, exposing the ground next to the pads. That was at 700V...

You can add insulation to the board with tape or something like that. Nail polish works very well to to mask exposed traces.

Just connect a wire to the nearest part on the same trace. Does the same thing... Edit: One thing, try to use just enough solder when soldering the caps and not drown the joint in solder. Just enough to bridge it and there shouldn't be any issues.

Not really as I bought just over one thousand of them off ebay some years back and they were custom made for some company by S+M.

It's all tube so transportable would be a better description. The heaters are hungry...

There was a card sized KGSS back in the day intended for portable use. The circuit is very linear in terms of bias current so it is certainly possible to make it portable. We are working on something else though, an all tube "portable" miniature amp for Stax.

Some news, the new prototype mini boards have shown up. Spent a couple of hours stuffing the amp boards but we'll see what happens when I turn them on... Don't know how we missed the huge mounting holes on the PSU board... The new SMD fet is just a bit too fucking tiny though.

Only the input fets need to be matched, the rest just needs to be from the same class.

Happy Birthday little one...

We should get him to model the new Kings Sound headphones...

Well my T2 transformers would beg to differ... I've never had imbalance issues with the 100 or so Alpha pots I've used but this could be one of the broken ones. A few of the pots I got in my first shipment had some sections reversed so they wouldn't work correctly. If you can feel a notch when turning it then it would be one of these. I thought I had found them all and returned them to Alpha but I could have missed one. Regardless, just PM me your address and I'll send you a new pot. We can't have an imbalanced amp.

It's easy to bend the metal arcs to get the perfect fit.

Yeah, sounds like a blown transistor.

People are free to do group buys but I'm only buying boards for my own testing.