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[AMPS] Re: Amps Digest V1 #164

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Subject: [AMPS] Re: Amps Digest V1 #164
From: pgerba@crl.com (Peter Gerba)
Date: Thu, 7 Aug 1997 22:57:35 -0700 (PDT)
Hi Phil;

Ya, with all the hair pulling it's hard to get a free education on here.

Send me some non public mail and tell me how your amp is comming.

cu phil

pete

Peter Gerba
pgerba@crl.com

On Thu, 7 Aug 1997, Phil Clements wrote:

> At 09:26 AM 8/7/97 -0700, you wrote:
> >Hi Phil;
> >
> >On the 77 grid trip.. I don't know about the "all". There seem to be many 
> >flavors of the 77. From my manual (model 77, no D) "Alpha 77's grid 
> >overcurrent relay system will not permit the amplifier to be grossly 
> >overdriven.."  I've tripped the relay; it's in there.
> 
> Thanks, Peter, I stand corrected on the grid-trip on the 77. I have only
> seen 1 
> or 2 at flea markets, and never a manual. Too bad they did not continue the
> circuit in the 77DX/SX models.
> 
> All this arguing about grid dissipation is moot. Grid-trip circuits work on
> current, not watts. The important thing is that a single 8877 grid be limited
> to 70-90 ma at all times, and as Tom said, be a very fast acting circuit.
> This will protect the tube in case of loss of load or light loading.
> 
> I never cease to continue my education here on the reflector....thanks!
> 
> (((73)))
> Phil, K5PC
> 

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