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In Reply to: RE: Which tube integrated to keep forever? Pilot or Sherwood? posted by Michael Samra on December 02, 2014 at 19:27:21
I have a pair of the SA3600 (I think that's the model#) power amps which use 4x6bq5's and I know they built a preamp as well because I missed buying one about 15 years ago. It looked pretty much like one of their integrateds.
The power amps are very nice, although like many of the pieces I've got in the stash, I haven't fired them up in a number of years. They show up on eBay maybe once every year or two, so I guess you could say they are not common pieces.
Follow Ups:
I thought I mentioned it but I didn't... What I wanted to say was thar Sherwood built mostly integrated amps and receivers and they were the best at it.That's what late night posting does to me.The didn't build a stand alone preamp.
"
Edits: 12/03/14 12/03/14
I rebuilt a pair of those for a customer a couple of years ago. They were the S360 amps. They were very good. Tube rectified and then a PPP quad of 7189/EL84 tubes. Used a 7199 as the AF amp and phase inverter. Sounded quite good. I remember adding a pot to dial the bias supply up and down a bit to match a particular quad of tubes....
As to the original question, I would keep the S5000
cheers,
Don
I changed the 12AX7 driver to a 12AT7 per Jim Mcshane and it worked nicely.
"
Those amps (I think they're called the SA-360?) are quite rare. It seems they were only sold during the changeover from mono to stereo. Sherwood sold a model (S-4400, I believe. I've got one somewhere.) which had a mono amp section with a stereo preamp. This allowed the buyer - who, perhaps, couldn't afford stereo or was unsure if it would take hold in the marketplace, to upgrade to stereo later by purchasing the S-360 power amp. I don't think Sherwood ever intended for the S-360 to be sold in pairs since, to the best of my knowledge, they never made a stand-alone stereo tube preamp. After stereo was better established, they only offered stereo integrateds and receivers.
. . . Charlie
Yes, this is correct. The S-4400 was basically an S-5000 with only one output transformer, which was beefier, and wired for PPP operation. The preamp was the same. The S-360 was the upgrade to complete the rig and make it stereo. IIRC, the S-5000 was $189 without case, and the S-4400 was $159. The S-360 was $59 I think.... So, you can see their strategy. And yes, the S-360 is as rare as rocking horse shit, but not as rare as the S-1060, which I've never seen. I just managed to finally get my hands on an S-360 after years of looking for one in good shape and with the original cover. I paid more for it than I've ever paid for any Sherwood amp.
I would LOVE to see an S-1060, 6x7189 output in PPP operation for 60 watts. Must be friggin' awseome.
You got me curious so I pulled a couple of pics off the web.
The S-1060 looks as if there are only two tubes in the preamp section, two drivers/phase inverters, and six 7189 output tubes for a total of 10 (no tube rectifier? ). The S-5000 with big iron and 7189 outputs has five preamp tubes, two drivers/phase inverters, four 7189 outputs, and a GZ34 rectifier for a total of 12 tubes.
Judging purely from a parts selection perspective (having never heard a S-1060) I would bet the S-5000 betters it sonically within its power rating.
Doesn't matter, I'm keeping my Samra'd S-5000 F-O-R-E-V-E-R............
Or at least until I'm deaf or horizontal.
Meat; It's the right thing to do. Romans 14:2
Sounds like they started with a mono version of the S5500 preamp.
Don Brian Levy, J.D.
Toronto ON Canada
He offered it to me for, I think $300, but that was back in the mid 90's and I thought that was way too much. Of course it's been a while so I guess it's possible that it was a preamp with a mono amp on the same chassis. Anyway, since I didn't get the amps until a few years later there was no pressing need for the preamp, although it looked pretty cool with the faux leather faceplate.And yes S-360 is correct because it's on the Radiomuseum website. I couldn't recall the exact model number. There are also a few threads about the amp here if you search this forum.
Edits: 12/03/14 12/03/14
With that faceplate it would likely be from their earliest days and mono.
Don Brian Levy, J.D.
Toronto ON Canada
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