[AMRadio] Globe Champion

[Brian Carling]

Fascinating that you are having the EXACT same problem I did with taming a p-p 
pair of V70D finals in your GK just like I did in my old GK400. This must be a very 
common problem!

On 4 Jun 2002 at 6:04, Sara & Wayne Steiner wrote:

> Re the GK275
> 
> I also have a GK275 which I found about 15 years ago and just
> renovated it about two years ago, Actually it is kind of a hybrid or
> mixed up GK. It has a 275 rf deck and an early 500 mod deck.  When I
> found it, it was in the middle of a modification with a 5 prong socket
> where the 2E26 goes and an 807 in it's place and a bunch of wires
> hanging loose.  After determining it was a 275, I put it all back
> orig. as a 275.
> 
> Here are my problems. I don't think the 2E26 has enough power 
> although it works ok on 75.  I see why the upgrade to an 807,really no
> problem here. The real problem is instability.  After neutralizing ,
> all it takes is a bump on the table , lift the lid, close the lid,
> BREATH on it, and it takes off like a shot. I have neutralized other
> P-P amps and have never had this much trouble.  I notice that this
> early GK275 has a skimpy grid coil shield (does not wrap around the
> coil).  There is a line of sight between the neut. caps and the coil. 
> I don't see this skimpy shield on other V70-D GKs. I think I'll
> experiment with a bigger shield when  get some other projects out of
> the way.
> 
> Anyone have any ideas on this.  Brian's post kind of hit home on this.
> 
> 73
> Wayne, N0TE
> 
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