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In Reply to: RE: Attention all Sherwood S5000 Owners posted by Eli Duttman on April 20, 2015 at 11:51:00
Yeah, the 7199 issue is definitely a concern with these. I have a stock of 4 strong ones in addition to what I have running in the amp right now. Couldn't hurt to stock up on some equivalents in case I need them. The 6gh8a's look to be plentiful and inexpensive...for now.
Follow Ups:
I have 4 strong 7199's as well as these nifty little adapters.
There is no need to rewire your amp to accommodate the 6GH8A or 6U8A. Just plug 'em in and play music.
Meat; It's the right thing to do. Romans 14:2
... and while I guess you could say they "worked," the results were FAR from good. Nothing wrong with the new tubes or the adapters that I can find, so it was probably just that use that was inappropriate. I have an S-5000 that is waiting on some transformer work, so I've got time and space to do any rewires, but I may wait and try the adapters before committing to a new tube config. I've been laying up 7199s here and there for a few years, I have 3-4 sets of NOS, but I believe the Sherwood runs them pretty hard, so I'm keeping an eye out for alternatives in case I get tired of shelling out $20+ per tube, like the last set.
you didn't make them yourself? Thanks.
I picked mine up on Ebay.
Just search 7199 adapters.
Meat; It's the right thing to do. Romans 14:2
nt
Very nice! Also have an S-2200, but without the MPX adaptor. I recapped it last year and replaced the dual-concentric volume pot with individual pots. Mine was so corroded that repeated DeOxit treatments couldn't bring it back. All original Sherwood brand tubes in mine!
Before I get scolded for stacking--I'm using two PC fans connected to a wall wart to exhaust hot air from the S-5000's power tube chimney and from the case. The amp stays cool to the touch and the tuner doesn't seem to suffer from any drift.
No MPX adapter = no or very little problem. :> ) DIYer extraordinaire S. Bench has provided us with a nice IC based design. The only potential real trouble is the drive capability of the discriminator and a JFET buffer will dispose of that.
Eli D.
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