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Title: Valiant PTT Mod Post by: W1KSZ on February 21, 2014, 12:27:15 PM I have a Valiant that has a number of mods done to it.
One was to replace (or add) a Kenwood 4 pin mike connector on the rear apron. One pin is marked PTT, but grounding it does nothing (yes, I am in AM mode). Anyone have any links to a PPT mod for the Valiant I can look at to see what may have been done ? Tnx, Dick, W1KSZ Title: Re: Valiant PTT Mod Post by: N8ETQ on February 21, 2014, 12:46:09 PM Hey Dick, Look here: http://www.amwindow.org/tech/htm/viking2ptt.htm /Dan Title: Re: Valiant PTT Mod Post by: WQ9E on February 21, 2014, 12:58:09 PM Dick,
The Valiant has factory PTT so no mod was necessary to add it. Maybe someone didn't like having the roughly 175 volt DC potential used for the plate relay applied directly to the mike switch and added an additional relay and low voltage source. Make sure the VR tubes are in place and seated, the PTT is looped through the safety connecting line built into the VR tubes. Title: Re: Valiant PTT Mod Post by: W1KSZ on February 21, 2014, 02:44:42 PM That was dumb, I should have looked at the schematic !! AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
Anyway, the reason it didn't work was the lead going to the PTT pin on the KW mike connector was not soldered !! Grrrrrrrrr !! OK, onward and upward. Tnx for the reply, 73, Dick, W1KSZ |