Do you mean that it starts high and then a few seconds later it drops ?
Or do you mean that the higher the frequency = lower output ?
With 3x BS170 @ 9v you will typically see:-
1.1w to 24Mhz
650mw @ 21Mhz
250mw @ 28Mhz (50mw @ 5v ?)
This is normal.
73 de Andy
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--- In QRPLabs@..., "cecco.delprete" <hb9afz@...> wrote:
To forum, help me please.
Have a question.
I notice that on 20m the power output drops dramatically (~50%).
Necessary fine-tune the LP filter?
Or are other problems: eg. DDS-VFO?
TKS Francesco, HB9AFZ
