Darrell and all, My Collins 310B, which qualifies as a vintage transmitter (c. 1947) has a phase shift sidetone oscillator. However, when I've used it, I've use a Johnson TR switch so I can hear my transmitted signal. It makes for great QSK operation if you're not working split. My TR7A of course has a sidetone, but I've never owned Drake separates, so I have no experience using them for CW.
73, Bob AD3K -----Original Message----- From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net] On Behalf Of Darrell Bellerive Sent: Friday, June 17, 2011 3:16 PM To: drakelist@zerobeat.net Subject: Re: [Drakelist] Ten-Tec and Drake Compared I notice the use of sidetones, and receiver muting does not seem to be commonly used in separate operation on the same frequency. Obviously sidetone would be needed when operating on different transmit and receive frequencies. I have often wondered about the lack of sidetone circuits in vintage transmitters. I have always had transcievers and sidetone, so it all just seems odd to me. :-) 73, Darrell Bellerive Amateur Radio Station VA7TO On 06/17/11 10:18, Paul Christensen wrote: > The beauty of this system is that the PIN diode switch allows just > enough Tx to Rx leakage for one to get about a 10 dB over S9 signal on > the receiver while transmitting in CW. So, you're listing to your own > signal in real time and switching is so fast that your own signal is > heard as just another signal on the band. The Tx and Rx VFOs are > free-running and do not have the handicap of needing to switch by the > amount of the CW offset between T/R excursions. > > Paul, W9AC _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist