That's not bad for a free-running VFO.
I used my '520S for nearly 30 years of very satisfactory hamming,
including PSK31 and CW. Zero firmware updates or system crashes! It
is still my backup rig in case of EMP or who-knows-what.
How many of today's rigs will be running in 30 years?
73 Martin AA6E
On 2/25/06, John Nason / NA9U <email@example.com> wrote:
> I know we have had a bit discussion on frequency
> stability. I was reading the old brochure from my
> Kenwood TS-520S a very populare mid-range priced rig
> in its day (1977).
> "Frequency Stability - Withing +/- 1 KHz during one
> hour after warm up and within 100 Hz during any 30
> minute period thereafter."
> I would say the there has been a slight improvement as
> well as expectation of that specifiation:)
> John NA9U
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