SET Asylum

What??!

24.27.41.140

Triode_Kingdom

In Reply to: RE: I bet nobody here had a set amp before me ...... posted by trioderob on October 06, 2022 at 13:11:37

Many thousands of people had SETs in the'50s and '60s. Most portable turntables were equipped with amps using a single ended 6AQ5, 50C5 or similar in each channel.

Follow Ups:

True but - Steve O 12:59:02 10/15/22 (3)
Both 6AQ5 and 50C5 are (were?) beam tetrodes, not triodes. "SET" usually signifies Single Ended Triode. Although it's certainly possible to triode strap these tetrodes for SET operation, I've never seen them used as anything other than tetrodes in consumer equipment. And there'd be a significant increase in drive voltage reqmt and a power output reduction compared to tetrode operation. Or maybe SET now stands for either Single Ended Tetrode or Single Ended Triode.
- No one still alive was the first - Triode_Kingdom 13:47:59 10/15/22 (2)
  OK, you got me, but it wasn't intended to be all that serious. None of those things I mentioned were hi-fi. Technically speaking though, no one still alive was the first to build a SET. SE triode amps using the 2A3 in communications amps and modulators were not uncommon in the '40s and '50s. And I remember friends whose fathers had similar designs for mono hi-fi when I was a kid. So, I didn't have a SET with an actual triode before the OP, but others certainly did. :)
  
  Edits: 10/15/22
  - No intention of a "gotcha" - Steve O 05:41:27 10/16/22 (1)
    Just that I found your reference to tetrodes in a triode thread curious. But yeah, single ended triodes, tetrodes and pentodes for audio output goes back to the early days of radio/electronics and is nothing new . . .
    - RE: No intention of a "gotcha" - sony6060 06:15:48 11/01/22 (0)
      There were many common SE amps in the 1960s and 1970s.

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