开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育

Ultimate QRSS filter components


"ferrymanr"
 

As the Ultimate QRSS should work on all bands up to 17M I wonder if a set of component values for the output filter has been calculated for bands other than the three bands listed. I built a 20M version of the filter section on Veroboard to temporarily convert my 30M board to 20M but used guesstimate values. The only other change was a 14.060MHz crystal. It would be nice if there was a chart of calculated values for all bands.
Dick G4BBH


Stephen Farthing
 

Hi Dick,

Thanks for the note. In his design Hans used the standard GQRP club output filters which are described here??. I have 14.000,000 xtals in stock if you want to get in the QRSS band. I do plan to do some 20 meter kits in the next run of kits which should be ready by next Monday.?

73s Steve


"ferrymanr"
 

Thanks for the link Steve. I had not been aware of that.
I obtained a couple of 14.060MHz crystals recently. Not really high enough for WSPR but these can be pulled a bit. I doubt if they will go up by 30 kHz though.
How about a fully synthed Ultimate QRSS kit (for under 20 quid)??
Dick G4BBH

--- In QRPLabs@..., Stephen Farthing <squirrox@...> wrote:

Hi Dick,

Thanks for the note. In his design Hans used the standard GQRP club output
filters which are described here output
filters<> .
I have 14.000,000 xtals in stock if you want to get in the QRSS band. I do
plan to do some 20 meter kits in the next run of kits which should be ready
by next Monday.

73s Steve