Tubes Asylum

RE: ARC D 70 II - Yes

172.11.32.65

Chip647

In Reply to: RE: ARC D 70 II posted by dgaapc7 on August 08, 2024 at 09:35:28

The "5th" tube is just a pass element for the regulator section.
It just has to be a properly functioning tube of the 6550/KT88 family.
It does not have to match the others.

Follow Ups:

RE: ARC D 70 II - Yes - dgaapc7 13:38:24 08/08/24 (1)
Thanks for the info. I'm listening to it right now, delivered two hours ago. Just biased with 6550's. The 6550s are labeled made in USA, but I can't seem to find a brand label.
Why did I ever sell the first one I had? The amp is terrific, with the trademark ARC way of making the music sound lively, full, and colorful.
LowIQ
- RE: ARC D 70 II - Yes - Akolegov88 02:12:52 08/14/24 (0)
  If the 6550 tubes are straight-bottle shape, they are most probably GE.

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