"Jim Shorney" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- On Sun, 10 Dec 2006 16:19:38 -0500, Chuck Wyatt wrote:
>Now that I've rewired the EV-630 switch to work with PTT, I'm getting a hum >through the speaker when I touch the mic body only when the mic is not >keyed. Problem seems to be that the on/off switch is SPST, one of the >element leads is grounded. If I contact the TR-3 ground to either element >lead it will key the rig. > >Any tips or tricks, before I go off and try and get lucky with a niche DPST >for this setup? Wire the mic element so it is "on" all the time, not running through the switch (will work with VOX this way). Use the switch only to switch the PTT to ground, there should be no connection to the mic element high. Mic ground, mic case/stand ground, and PTT ground should all be common. If this was a surplus PA mic there may not be enough wires in the cord and you will need a new cord - you should have, at minimum, a shielded wire for audio and an unshielded wire for PTT, possibly with another unshielded wire for PTT return that can be connected to common ground with the audio shield. Hope that makes at least a little sense.... 73 -Jim -- TR7/RV7, TR6/RV6, T4XC/R4C, L4B, NCL2000, SB104A, R390A, GT550A/RV550A - all vintage, all the time! ---------------------------------------------------------------------- Submissions: [email protected] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net ----------------------------------------------------------------------
