[Boatanchors] Viking II Modulation Problem

[Al Parker]

Hi Carl, et al,
    Here's a cupl between Dick & me-- (I corrected some typos)
-----------------
hi Dick,
    Interesting, I just ckd V-I & V-II skems, they both use 6AU6's, the V-II
doesn't byass the screen, maybe cuz it gets tied to the plate.  The V-I has
reduced voltage on the screen & bypasses it.  The Valiant uses triodes
there.  Maybe they figure the V-II's connection makes it act like a triode.
Your bypass would tend to reduce the HF audio component I'd think.  If so
you could drop the voltage some with a resistor from B+, to isolate the
bypass from the plate/signal line some.  The V-I put 375v on that screen.
73,
Al

----- Original Message ----- 
From: "Richard W. Solomon" <w1ksz at earthlink.net>
To: "Al Parker" <anchor at ec.rr.com>
Sent: Saturday, October 10, 2009 1:08 PM
Subject: Re: [Boatanchors] Viking II Modulation Problem


> The first one is, the second is not.
> I stuck a 0.5 mFD on it and killed the
> oscillation.
>
> 73, Dick, W1KSZ

-----------------------
----- Original Message ----- 
From: "Carl" <km1h at jeremy.mv.com>
To: "Al Parker" <anchor at ec.rr.com>; "Richard W. Solomon" 
<w1ksz at earthlink.net>; <boatanchors at mailman.qth.net>
Sent: Saturday, October 10, 2009 1:53 PM
Subject: Re: [Boatanchors] Viking II Modulation Problem


> If it was factory built it has a chance of being correct and unhacked. If 
> it
> was a kit than anything is posible.
>
> Carl
> KM1H
>