[DSP-10] DSP-10 with external Frequency Control

[Doug Bade]

         This brings up a question I have been meaning to ask.. I 
externalized the 3 connections through rg174 for the 10mhz osc switching. 
When I jumper loopback external to send 10 mhz back in, the oscillator 
jumps 1.24 khz off freq due to loading changes of the oscillator with a 14" 
loop of coax more or less...External input works great, but cannot warp 
oscillator that far to get on freq.
         Has anyone figured out a switch scheme to allow internal/external 
10 mhz from the panel? I am considering a mosfet shunted across internal 
pair on board or similar schemes.. Anyone have a working plan???
Doug KB8GVQ


At 04:21 PM 2/27/02 -0800, you wrote:
>Jimmy W7CQ and I made are first LHL7 Qs with 1 mw or less.
>
>We have both of our DSP-10s controlled by our external 10mhz - GPS 
>frequency standards. These standards use the Brooks Shera controller with 
>an HP 10544A crystal oven.
>
>If WX holds and I can get the antenna damage repaired this week end, after 
>our major wind storm here 3 weeks back, will be looking to try other weak 
>signal modes.
>
>73
>
>de KO7N   CN84ia
>
>Richard Ewing
>PNW VHF Society C-075
>http://home.teleport.com/~rewing
>
>
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