[Boatanchors] Viking II audio

[mac]

Larry,

Not sure which one of the multitudes of Viking-2 audio mods you're  
undertaking but be advised that the stock driver transformer (Plate to  
PP grids)  is not up to handling anything more than the original  
triode connected 6AU6 driver was able to put out.  If you are trying  
to drive the 807 modulators harder you will need to upgrade the  
transformer as well and if you're really trying to run the 807s AB-2  
you'll need something like a 6AQ5 with negative feedback and a  
transformer rated at 5 watts or so to do the job.

Dennis D.  W7QHO
Glendale, CA

****************
On Jun 5, 2013, at 3:46 PM, bcarling at cfl.rr.com wrote:

> I have all of the parts available for Johnson Viking II  
> Transmitters, Including the Transformers.
>
> Email me off the list for pricing and details please.
>
> Bry Carling
>
>
> ----- Reply message -----
> From: telegrapher at q.com
> To: "Boatanchors" <boatanchors at mailman.qth.net>
> Subject: [Boatanchors] Viking II audio
> Date: Wed, Jun 5, 2013 5:52 pm
>
>
> Well in preparation to modifying the Viking II audio, removing the  
> 6AU6 tubes, enlarging the sockets to accommodate 9 pin types and  
> using a 12AX7 to drive a 12BH7, i discovered the reason for my  
> squeaky audio.  The primary of the driver transformer was open.   
> While in conversation with a couple local hams today on 40 AM, that  
> topic came up.  One fellow said that it seemed to be a natural thing  
> in not only the Johnson rigs but Elmac as well that for some reason  
> those transformers would open up.  It happened to me!  Now to find a  
> replacement and get on with the mods.  This was a pretty good reason  
> for me not to have much modulator current, ya think?
>
> This could be more fun than i want to have.  Focusing the eyes in  
> areas like this is getting to be more of a problem every day.  Its  
> the golden years that are causing it i'm sure!
>
> Larry
> W0OGH
>