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Title: RF bypassing panel meters Post by: KK7UV on December 21, 2022, 05:25:19 PM I am wiring up the meter panel on my 813 build and got to wondering about what capacitor value to use for RF bypassing. I don't remember why I wrote .01µF on my plan. I see commercial and homebrew examples with values anywhere from 0.1µF to .001µF.
In addition, some rigs use a combination of series chokes and shunt caps, and some add a pair of cross-connected diodes across the meter studs. Any thoughts? Title: Re: RF bypassing panel meters Post by: W7TFO on December 21, 2022, 09:58:14 PM Regular DC mA & V meters should be bypassed with a .01 mica across the studs, leads as close as possible.
AC meters usually have micas from both studs to ground, at times shielded as well. 73DG Title: Re: RF bypassing panel meters Post by: ki4nr on December 22, 2022, 11:14:44 AM Also put diodes back to back across the meters to protect them. Depending on the voltage, you may need two in series.
Title: Re: RF bypassing panel meters Post by: KK7UV on December 23, 2022, 09:14:26 AM Dennis - thanks! completed the mica cap installs yesterday. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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