Sound Technology 1700B

Propeller Head Plaza

Technical and scientific discussion of amps, cables and other topics.

Well, it's been a few years. My 1700B has decided to cease operation, so it really is time for a repair and full rebuild. Here's what I am planning:

* Replace all electrolytic caps in the unit. One of the main filter caps is dead, so it's time to do the lot.
* Replace all the carbon composition resistors. A quick check on half a dozen has shown a 15 ~ 25% upward drift. Why did ST use CC resistors? I've been using cracked carbon since the 1960s.
* I was going to replace the OP amps with LME49710 OP amps, but, well, you know. NLA. AD797s look like the best (as suggested many years ago by John Curl), available option. Any other suggestions?
* Replace all the opto couplers.

I welcome any input.
Trevor

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Michael Percy Audio

Topic - Sound Technology 1700B - Trevor Wilson 14:58:53 01/02/22 (2)

RE: Sound Technology 1700B - stellavox 12:27:10 04/16/22 (1)

RE: Sound Technology 1700B - stellavox 05:28:20 04/17/22 (0)

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