spritzer

Stax and serial numbers mean nothing so it could very well have been brand new. The first Mk2's were SZ2 but there were reports of SZ3 in the mix as well. The new ones should be SZ3 but who knows what they are up to now.

Yes, the drivers were glued to the baffle on all my sets. No pics as I didn't take any but as soon as you open them up there should be a very dried out adhesive ring.

The input on that KGSS is so fucked that it might be better to just take the pot off the board and just wire it all from the beginning. You should have a 100R input resistor and 500K shunt to ground. That's it... Be sure to replace the adhesive rings in front of the drivers or they will sound pretty wonky...

Exactly what I though. The Schottkys would be even worse...

You need to use the OPA445 on this one or it will die very soon.

Good that it works and I'd add some solder to the tube pins (helps take the strain when inserting tubes) and clean off the flux.

First thing I'd check is a cold solder joint or something like that. Then measure the pots and see what they are doing when you turn them.

It's hard to say really, the old Stax is hit and miss but if they were never exposed to direct sun and never arced then they should be just fine.

Must try that sometime. Use a transformer way past its rating but only use one winding... Yup quality stuff.

For hum I'd look at the rectifiers and caps. they are all probably well past their prime. I would swap them all out regardless just to be on the safe side.

Ahh yes, the old acetate failure... must have been the same problem as with the 12.6V transformer used in the Extreme's...

Hangikjöt is delicious but I don't touch any of the other shit. My GF does like svið which is kinda revolting...

Aluminum or some alloy of it as it is anodized. Since this was bumped, these have been placed in the 'stat storage and I don't see any need to use them. They are ok but need a lot of work until they are finished. They do remind me a lot of the insanity of the old HE Audio garbage, thinking that super high resistance on the diaphragms would somehow make them not noisy from the lack of dust covers or using a coating that absorbs moisture is somehow a good idea. It's such fun to be listening and having to take the phones off your head after 20 minutes so the built up moisture can dissipate and the diaphragms can be charged up again. Such design... I also love the fucktard on HF claiming the Orpheus clones they have are some sort of upgraded model from these. First off...I got them not two months ago and second...you can just pick which version you like. The builder claims these are the more accurate ones so let's just go with that. I actually specified dust covers but they clearly impact the SQ... Next up will be the Ether 'stats which might be problematic with a 0.58mm DS gap.

Most of the parts in the T1's can be found but yeah, anybody with any sense would never mod these for other people. The PCB's aren't of good quality and easy enough to damage something beyond repair. For us it is just fun to muck around with this stuff... I for one find it to be cathartic to fix some of the older stuff even if it can try to kill you from time to time. Looks at the naughty SRA-3S in the corner...

Having a T1S sitting idle here I decided to have some fun with it. Drew up a small CCS board, a scrap heatsink and voila...an improved amp is born. Bias supply fixed, all caps replaced and output resistors fitted. I ran it a bit hotter than stock so I had to modify the tail resistor on the output cathodes down to 1.5K but that is easy.

Don't go dragging logic into this!! These are musical instruments!!!!!

The single tube seems to be similar BS as the Woo WES phase splitter. High noise and barely works. Those Stax emblems look like they were pulled off headphone stands...

Some more Italian fuckery... http://www.giancarlomassa.altervista.org/ This is so bad that it isn't even funny. Love the PSU in the transformer box...

Be sure to vote for her on that Facebook page. She managed to get out so all is good.

I do this as a public service...

Look at the input wiring, the XLR's go to the attenuator but the RCA's (I assume they are RCA's on the right) go directly to the middle tube. So this is a pretty horrible clusterfuck of an amp... Edit: Yup, those are RCA's on the right: http://www.megahertzaudio.it/guerra.htm

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Blonde pole fitness instructor...

Yeah, funny that the pics don't match at all. Also, why 6 triodes to drive the output tubes balanced? You can do it with 8 but 6? I very much doubt it... Well unless the middle tube is a phase splitter and it's just a two section amp?

I was just reading HF and came across this "gem". It's not an amp...it's a "musical instrument"!! Yeah...what the fuck is it with Italian amps being garbage? Rudistor and now Megahertz... Bask in the glory of this hand built masterpiece: As soon as I saw this it was eerily familiar... So back in 1968 Stax released two schematics, the SRX and a simpler two tube design with grounded cathodes. Back in 2013 I released a schematic of a balanced take of that amp and built one unit. It was ok for a cheapo amp but yeah...nothing that sets the world on fire. Here is the schematic: Ok so let's look into this. Two 9 pin tubes so ECC83 input (pretty much has to be for enough gain) and any of the high power dual triode noval tubes. 6CG7 would work... So we clearly have a resistor loaded output stage with a grounded cathode and output caps (the big ones) and high value resistors after the cap to ground. The input is clearly balanced and not many versions of that possible with interstage caps. Electrolytic cathode bypass caps for higher gain and those silver things might be the input caps. Sure as shit there are four of them... Now for the PSU and just the parts quality... this sure as shit doesn't look regulated or filled with quality parts at all. I guess that and the mediocre circuitry makes this worth 1/2 of what Woo ask for the WES and a "musical instrument".