[Collins] re zener diodge mod re pto on kwm2

Dr. Gerald N. Johnson geraldj at weather.net
Thu Jan 27 11:48:03 EST 2011


Is the PTO supply voltage or the shift voltage? or the BFO shifting. 
ASAB1004 talks about some capacitor changes in the BFO to make it more 
stable.

The PTO regulation mod is posted at: 
http://www.angelfire.com/de/vk3kcm/drift.html which says it was in SB11B 
which
isn't on the usual site.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association

On 1/27/2011 9:43 AM, Fern wrote:
>
>
>     I've finally fired up my latest kwm-2 acquisition. However, I've got a
> problem where the transmit and receive frequency is off enough that I need
> to do the mod to stabilize the voltage to the pto with a zener diode. I've
> done a google search for this without any results. Any help with this would
> be greatly appreciated.
>     73 from Fern
>
>


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