[Elecraft] K1 Future Improvements to VFO D3, R17, R18 any one tried??

[Lambs, Dick & Judy]

There is one very simple solution to greatly improve the stability of  
any VFO:  blowing air over the equipment case. It's not obvious, but  
by keeping the case cool, you keep air inside the case close to  
ambient temperature.   The stability gain can be incredible--around  
an order of magnitude.  I like to think it also reduces the chance of  
component failure due to to heat.

You can place the fan on a stand behind or next to the transceiver to  
blow over the top.  I place the fan right on the top, horizontally,  
raised with spacers in each of the fan's mounting holes.  (No holes  
in the case--just gravity holding the fan.)  I drop the voltage to  
the fan to about 50% to 75% to keep it quiet.

I've not tried this with a K1, but it sure works with other  
transceivers.

73
Dick, K0KK

On Dec 19, 2005, at 4:31 PM, Mike Morrow wrote:
>
> But returning back to the original question, I'd say that if anyone  
> finds something simple that improves the already excellent  
> stability of the K1 VFO, I'd certainly be interested in hearing  
> about it.  Happy experimenting!
>
> 73,
> Mike / KK5F
>
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