[AMRadio] Globe Champion
Bob Peters
soundimp at pobox.com
Tue Jun 4 21:27:43 EDT 2002
I have been running my King 275 with V70D's for 6 months
and have never had a problem....Just purrs all the time..
Bob K1JNN/5
At 09:10 PM 6/4/02 -0400, you wrote:
>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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> > AMRadio at mailman.qth.net
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>
>
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