In a message dated 6/10/2007 6:32:57 PM Central Daylight Time, [EMAIL PROTECTED] writes:
> PS: I'd really like some ideas on simple PTT circuits for this thing. > On my BC-1T I took out the latching jumper on the plate relay (shown on the diagram as going from #7 of the plate relay to TB-9), and used the normal external plate switch terminals TB1-8 and -9 for the for the contacts of my remote control relay. I run the remote relay on 24 volts via the PTT switch at the operating position. Another set of contacts on this relay also keys the antenna switching coaxial relay on the top of the rig. I am thinking, however, of using a backwards 120v/12v transformer in parallel with the 240 VAC primary of the plate supply to feed the antenna relay coil - that way it would switch when I press the front panel play lever as well. Might not be as good, my present set-up gives a slight sequential timingadvantage: antenna first, then plates on. For the PTT switch that keys the remote relay I used an ordinary SPST wall switch as used in household wiring. I mounted it in an outlet box under the front lip of the operating desk, and added a red light to the cover plate so I can see it is on. Steve WD8DAS ************************************** See what's free at http://www.aol.com. ______________________________________________________________ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
