Does anyone have schematics for either the Gold (balanced?) or the unbalanced version of these? I told a person I dealt with (diyaudio user) that I thought they might be available (and told him why bother), but his interest is just in the front end section as a preamp).

I saw what is available on the eservice info site, but can't remember my login there. The user says he has some incomplete schematics with pencil markings on them. I had the attached jpeg, but think this could be what he already has.

Thanks for anything you can find.

I'm pretty sure that these were available back in the day so someone must have them. I'll see if I can dig out an old external drive and search for it since I used to download stuff like this and save it but not sure I ever bothered with the Melos stuff. I'd wager @spritzer or @kevin gilmore are the most likely to have it at the ready.

Also wondered if you'd seen this - 

 

actually all I have is the original above. this thing is a real fucked up mess designed by an idiot on lots of really bad drugs.

using the tube filament as a load for the output transistor is all sorts of fucked up.

Thanks guys. The video was interesting, to say the least

I found a Grado HP-2 and now I wonder if anyone would want an updated SHA-1 😄

but also, could it be considered an update if it DID NOT use the tube filament as a load??

Kevin is now working on a new amp that uses 2 car batteries and a coat hanger as the load

We just call that a nipple stimulator in the gay world.

Edited March 15, 20233 yr by swt61