Hi Stewart,
I think on the TS-690 (as well as the TS-850) the RIT affects the
digital synthesizer. Especially because the current RIT position is
displayed in decimal numeric form on the display. The A/D converter
won't be very impressed by a higher voltage from the RIT pot ;-)
But in the meantime, I built a small active antenna with a high-Q
preselector (L/C tank, and FET source follower) which seems to work
reasonably well. But the indoor QRM is still terrible.
73,
Wolf DL4YHF .
Stewart Bryant schrieb:
MIKE REID wrote:
Wolf,
Try setting the rig to 499.99kc and use the RIT to go up into the
501kc band. No more attenuator!!! That�s what we do on 505-510kc here
in the US.
Is the RIT control a stable input to the frequency synthesizer?
In some rigs it is a pot either directly driving an oscillator, or it
is an ADC on the control processor where it is used as a poor mans
digital input.
RIT was originally intended to provide SSB offset, not the 1Hz class
stability that is needed for QRSS.
73
Stewart G3YSX
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