Tnx Ken.
In your example with the transverter, it would be multiplied.
I guess it would make a big difference then.
But I don't do that either.
I just use my rig on the shortwave bands.
What about the older rigs like Omni VI+?
Are they stable enough for PSK31?
Ken I am interested in having good enough stability, but I am not going
to worry about chasing something unnecessary, just for the sake of being
as good as technology permits. Since I have never operated any of these
modes requiring such stability, I am simply not in the picture. Time
for me to catch up, I guess.
In my ham world, contesting, most QSOs last only a few seconds and the
other station rarely hits my exact frequency anyway.
Even the old VFO rigs were good enough for that!
I guess my attitude can be defined as, "I want my rig to be good enough,
but I don't need to be holier than the pope." (hi)
73
Rick
Ken N9VV wrote:
Sorry Rick, I don't have the spec for PSK31, but common practice
requires that your signal vary only a few Hz (if at all). In fairness,
there are instabilities in sound cards that can cause drift too.
Another benchmark is to speak with the ESSB guys on 3615 or 14.178. I
believe you will hear from them that any drift greater than a few Hz is
immediately noticeable from their perspectives and trained HiFi ears.
Alan Davis K2WS offers an OCXO upgrade for the Flex-Radio SDR-1000 for
just that reason: http://www.n9vv.com/K2WS-OCXO.html
How about if you are transmitting into a TRANSVERTER that gets you from
10M to 10Ghz. I wonder what the 50hz drift could be, when multiplied by
the Ghz equipment?
Ken
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