[MRCG] Clatternet

[Mark J. Blair]

> On Nov 17, 2014, at 09:13 , boatanchor at martasystems.com wrote:
> 
> BTW, on the MD-203 FSK modulator, I have disconnected the crystal ovens (which helps) but it's internal LOs still drift around. I check its output and adjust the TX input LO (a synthesizer) before transmitting to try to remain close to net freq. Wonder how it performed in the field when it was new?

I think it ought to be plenty stable with the ovens on, so I suspect something is wrong. Maybe the thermostats are bad, or at the wrong temperature, or the crystals have become damaged so their optimum temperature point has moved, etc.


-- 
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/