The issue does not arise with 'modern' rigs where the vfo is one part of a mixer system, and other elements of that are turned on only on tx. 'Back in the day' where the vfo was directly on, or a sub multiple of, the tx frequency it was common practice in simple designs? to mute the vfo in receive mode (not good for stability!) and to be able turn it on briefly in receive mode when a 'netting' signal was required. This arrangement would still be useful when using the QRP Labs VFO as a basis for a 'vintage' AM/CW TX.
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-------- Original message --------
From: Alan G4ZFQ <alan4alan@...>
Date: 18/12/2021 08:58 (GMT+00:00)
To:
[email protected] Subject: Re: [QRPLabs] how to disable output when going from tx to recieve
> the lack of a facility to be able to mute the output or switch off
> the vfo and remember it's set frequency is a serious flaw
?John,
You may think so but not many rigs turn off the VFO or even change its
frequency for TX. Maybe I've missed it but I do not remember having seen
that as a feature of VFO designs, which ones do?
I expect Hans will sometime provide some facility as a few have asked
him for it.
73 Alan G4ZFQ
