[Boatanchors] Gonset GSB-201 Info

[Greg Mijal]

Hi Rock:
The 3340 is the identity number for a specific model Gonset product.

There are at least two versions of the GSB 201 style amp.  The original 
version is 4x 811A's and will have "GSB 201"  just below the meter on the 
right hand side.
The other amp is the same package but runs 572B's I think and is rated 
higher in power output.  Cabinet and FP is a bit more modern looking.
All my manuals are packed for my house move at the end of the month so I 
can't help anymore than this.
My GSB 201 runs 811A's and works well with Chinese tubes in it. Excited with 
an Eldico SSB 100F transmitter it is a reliable amplifier here. Not only is 
the amp deceptively heavy it also runs hot but will make a really nice light 
show as the 811A's glow thru the small holes in the cabinet. If you want to 
get a positive ID you will have to get the part number off the power 
transformer and compare it with the manual (BAMA)
The most significant modification for the GSB 201 is removal of the external 
blocking bias.  This is an improvement of the circuit and there is no 
downside to the mod.
The amp is well worth the effort.
Have fun, you got a keeper!
73's
Greg
WA7LYO
in sunny Feenix
----- Original Message ----- 
From: <N1UDI at att.net>
To: <Boatanchors at mailman.qth.net>
Sent: Sunday, March 18, 2007 2:44 PM
Subject: [Boatanchors] Gonset GSB-201 Info


> Gents
>
> I would like you input and info regarding the Gonset GSB-201 Linear amp. I 
> picked up one at a tag sale, and when I say picked it up I had to put my 
> back and legs into it. A lot of weight for a small package. I recall the 
> Gonset Corp when I was a teenager as a SWLer, but that's it. This one says 
> it's a model # 3340 on the manual cover what does that imply to? I see 
> that there are four 811A's installed in it. Looks like the last owner now 
> an SK wrote in the manual in the spec's section for the tubes 572B's? I 
> asked  his son if dad had been running this amp whit that config befor? 
> He was not shure sense he (the son) was not a ham.
>
> Were there different models of the GSB-201? Any mod's that came up through 
> the years? I see some yellow wires added looks like a mod of some sort. I 
> was advised by the son that this amp may  have been out service for close 
> to ten years, about the time his dad took ill. Too bad I got to the tag 
> late, 15 mins after the opening bell. I looked around and saw what was be 
> a National  radio whit the red emblem on it. The guy standing next to it 
> avised me it was sold!   A closer  look and it was a Gonset GSB-101 whit 
> the those big 866's sitting in the back cover was MIA.  I asked what was 
> his call sign, stated he was not a ham??? Looked liked all the good stuff 
> was taken.  I was walking out and saw this GSB-201 laying on it's side 
> whit the top cover off under a bench. The price was shure right!
>
> What should I look for so I don't let the smoke out the schematic looks 
> stright forward.
>
> Regards' Rock
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