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Title: Harvey Wells TBS-50 T/R Switching Question Post by: W1UJR on May 29, 2006, 06:41:41 PM Maybe I have overlooked something, but how does one go about switching a 110VAC Dow-Key off this transmitter?
I can't seem to find a switched series of terminals on the unit. Am I looking at the wrong schematic, or is there another simpler means? Tnx - Bruce W1UJR Title: Re: Harvey Wells TBS-50 T/R Switching Question Post by: ve6pg on May 30, 2006, 01:02:41 AM ...BRUCE,TIM HERE IN TORONTO....SEND AN EMAIL TO CHRIS,
va3nth@sympatico.ca ...HE'S WERKING ON ONE,AND HAS 2 AS A MATTER OF FACT....TIM....SK.. Title: Re: Harvey Wells TBS-50 T/R Switching Question Post by: Pete, WA2CWA on May 30, 2006, 02:39:46 PM Page 24 and page 25 of the manual gives tips and circuit info for push-to-talk operation. Also Bulletin #10 has info on PTT. AC switching is not recommended.
Title: Re: Harvey Wells TBS-50 T/R Switching Question Post by: W1UJR on May 30, 2006, 05:33:06 PM Page 24 and page 25 of the manual gives tips and circuit info for push-to-talk operation. Also Bulletin #10 has info on PTT. AC switching is not recommended. So is it suggested to use a low voltage DC relay? Guess I could use a DC relay to run the Dow-Key. Tnx - Bruce Title: Re: Harvey Wells TBS-50 T/R Switching Question Post by: Pete, WA2CWA on May 30, 2006, 05:42:44 PM Page 24 and page 25 of the manual gives tips and circuit info for push-to-talk operation. Also Bulletin #10 has info on PTT. AC switching is not recommended. So is it suggested to use a low voltage DC relay? Guess I could use a DC relay to run the Dow-Key. Tnx - Bruce Bruce: Why don't you just go to the BAMA site and get the manual. It sounds like you don't have it. I didn't spend a lot of time reading the text when I looked at it. You could also use electronic T/R switching. One tube, adds a little gain for the receiver, voltage derieved from the power supply, noiseless. Ye old knife switch also works great if you're into manual. |