Maybe triode electronics? Looks like there is the initials np on the board and they had a guy name Ned doing the circuit design I think.
Hello, thanks for taking a look. Could be. The NP marking is actually ' inside' the layers of board material itself- not silkscreened on. Its a nice board- substantial tracks, plated through holes, soldered well. I'm considering trying it out in a build and would like to know, if possible 'what it is'.
Yeah, NP is the maker of the board laminate material. I see it on boards we have done at work. I'm looking at one as I write this, and I assure you, it has never been near Triode Electronics...
I don't know who made it but it's just a STOCK replacement ST-70 board. Now go to Triode, Tubes4hifi, or Dynakit to see if they make stock replacement boards. Ned Carlson was the guy at Triode but I don't think he did stock boards.
Craig
Craig
Ned used to be at Triode, but he's been gone for nearly a decade now. He had a three tube board that was designed by a guy who I believe died about 15 years ago. After the fire at Triode, the board and artwork were lost and I supplied the new boards for them. Before ned got back on his feet I asked if I could re-layout his board for my own use. After that he bought them from me. I didn't design it, but rather just re-created the original design.
I don't believe Triode ever had a two tube driver board, but they might now.
Sheldon
I don't believe Triode ever had a two tube driver board, but they might now.
Sheldon
I've had it 5 years, and the guy I got from had it a while as well. I dont see anything at triode or the other big dynaco sites that looks like this. I'm aware it's just a copy of the stock dynaco- I was just hoping someone could say "yeah, that is so & so's board from around 1990" or something similar. Thanks for looking.
It came with a couple of tubes the guy said are 7199's- but they have NO markings on them at all- been rubbed off I suppose. I have wondered how to tell if they are even 7199's.
It came with a couple of tubes the guy said are 7199's- but they have NO markings on them at all- been rubbed off I suppose. I have wondered how to tell if they are even 7199's.
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Follow the pins ! 7199 has a unique pin-out, so by examining the socket connections and comarig with the schamatics will tell which tubes that fits.
You are right it is the 7199 🙂
Here is the schematic, as far as I can make of it from the photos
.Mona
Attachments
Thanks a bunch for the schematic. A populated, but never installed Curcio quad cap board was also included in the box of parts. I think I will try to build an old chassis I have and use this driver board and the quad cap. I was going to go with a VTA board, but lately, have been considering building what I already have first.
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