spritzer

My post reference was aimed at complin and not you. Now what we really could need at some good new Stax amps. The p-p figure is easy to determine based on the plate voltage and the tube parameters (Rp mostly) but that said, it doesn't really tell the whole story. Most of these amps can't be adjusted for max voltage swing for the particular tubes installed so it can be a ways off. Speaking of whacky Stax amps... I've been cooking up a plan for a while now to make a tiny one. Just got some boxes and they are 150x90x45mm (D, W, H) and I'm going to try and cram an Egmont in there... Transformer and tubes on top but the rest has to be crammed in there. XLR's are too big so this has to be RCA only...

Check out post 8317... The SS is stator to stator so pretty much p-p. That thing has to be pretty much the same circuit as the M-20 and I posted it some pages back. Not a bad circuit but 2400€? Ehhh... no....

I prefer to use a hammer but yeah, that is possible. The problem with the Mk1 pads was the foam as it just didn't last long enough. It would get too soft and then the pads were useless. My Mk2 pads are fine after 5 years now though so a proper improvement for one from Stax.

Aren't the brown pads just the same stuff as they sold for the Mk1? If they come in a nice EP-007 box then it is something different but otherwise it's just the same old pads.

Only thing I'm concerned about with Kerry's boards are the STN9310 temp given what I'm seeing in the onboard amp. Might need to add some more area for heatsinking but only actual tests will verify that. Give me through hole parts anyday so I very much doubt this is going to happen.

Yup, better replace everything.

No, makes very little difference.

Depends on where you buy it and what specs you ask for.

Exorcism?

Yes, good photos and you checking the soldering a few times to make sure everything is ok.

To drop the 20V use a 13.5K series resistor, a 390K to ground after that and then the 5M ballast resistor.

That is just odd. You could always transformer couple the source but that is maybe going a bit too far...

Have you quadruple checked all the parts? Same fault on both boards is either PSU related or the wrong part on both boards.

The new HVk PSU board? It is 6.92" by 6.56 and the distance from the back of the transistor to the edge is 0.563014" give or take... So both boards are like this?

Using the BH transformer requirements would be a good idea with this one. I will be using one of my spare BH transformers so only +/-400V but for 450V use a ca. 400VAC transformer.

Glad this was sorted.

Happy Birthday!!

There should be a schematic in the "now for something different thread" or I could just be imagining things. I'm sure Kevin sent me a link to it at some time or I can try and find the simulation files...

So no more Analickus? Such a shame... How will we find out more about the plankton?

Yes that's how the rating works. I believe Belden also rate their wires when you bundle them and then they are 1000V+ for the 600V PTFE.

They claim 450V but who knows what the drivers will actually handle.

Who let the HF shortbus in?

283-2.0-RC should work just fine.

You are talking about the production amp here then? Doesn't matter really as it is the same case with all amps that feature multiple outputs, there are just two channels in the amp so power will be shared. Matching is better but it should work just fine with no matching at all.

Try them on Pro bias and report back. They should be just fine unless you given them the full volume of the BH.