bias adjustment
What are those extra tube inputs for?
Hi folks,
I have an amp built on a Dynaco st 70 chassie. It is only 8wpc and uses el34's. The guy who built it said the he used all platinum connections in it's guts and chrome plated it. Saying that the only Dynaco thing about it was the chassie. It has these extra tube input holes in the front coming out horizontally. I havent the slightest idea what they are for. Should I stick some extra tubes in there?
I have an amp built on a Dynaco st 70 chassie. It is only 8wpc and uses el34's. The guy who built it said the he used all platinum connections in it's guts and chrome plated it. Saying that the only Dynaco thing about it was the chassie. It has these extra tube input holes in the front coming out horizontally. I havent the slightest idea what they are for. Should I stick some extra tubes in there?
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- 7 posts total
Eldartford is correct. The original ST70 amp contained front panel sockets that you could plug the preamp into. It also had one of the socket holes marked on each side to show where to insert a voltage meter probe to check the bias of the output tubes. Here is a link to a picture where you can see the original configuration: http://www.tnt-audio.com/ampli/dynaco2e.html |
- 7 posts total