The nice thing about switched serial caps (if same values) for tuning
upwards from a low resonance is the voltages are all the same. Plus caps
and appropriate relays are cheap, easy, and small.
Rick, I think you might have suggested this to me, and my implementation
was published in QEX May/June 2019.
Grant KZ1W
On 2/28/2021 07:10, Richard (Rick) Karlquist wrote:
On 2/27/2021 2:23 PM, Artek Manuals wrote:
Rick et all
he feed, The taps are relay selected . Taps selected for a dip
at 1816, 1840 , 1860, 1880, 1900 and 1920. SWR 1.3:1 from 1.8 to 19.5
which the my KPA1500 and Alpha 9500 both love.
Dave
NR1DX
manuals@artekmanuals.com
Thanks for posting this suggestion. Perfectly reasonable design.
I use an alternative design using switched mica capacitors.
I also use a 2.25:1 matching transformer, but the "windings"
are implemented using coax. Not sure if Sevick does this.
73
Rick N6RK
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