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I have been spending the last few hours trying to get DM780 to work with a COM port (RTS/DTS) keyer I built...

It works fine on 432, 144, 50, and 28Mhz... However When I dropped down to 21 and 14Mhz and Key up it locks in transmit...

NOTE: into a dummy load this does NOT happen

I have not tried it into other rigs for this purpose,

Also manually using the key does not lock into CW TX...

another thing to note: I have also tried doing a continuity test into my Digital Volt/ohm meter, it worked great and was REALLY funny to listen to @ 100WPM lol

This is the keyer I built

http://www.logger32.net/help/Logger32/Configuring Push To Talk.htm

The only way to stop the radio from keying if if gets locked is to unhook one of the leads coming off of the COM port keyer...

<blockquote data-quote="mr_fx" data-source="post: 504908" data-attributes="member: 22137">I have been spending the last few hours trying to get DM780 to work with a COM port (RTS/DTS) keyer I built...&nbsp; It works fine on 432, 144, 50, and 28Mhz...&nbsp;&nbsp; However When I dropped down to 21 and 14Mhz and Key up it locks in transmit...&nbsp; NOTE:&nbsp; into a dummy load this does NOT happenI have not tried it into other rigs for this purpose, Also manually using the key does not lock into CW TX...another thing to note:&nbsp; I have also tried doing a continuity test into my Digital Volt/ohm meter, it worked great and was REALLY funny to listen to @ 100WPM&nbsp;&nbsp; lolThis is the keyer I built<a href="http://www.logger32.net/help/Logger32/Configuring%20Push%20To%20Talk.htm" target="_blank">http://www.logger32.net/help/Logger32/Configuring Push To Talk.htm</a>The only way to stop the radio from keying if if gets locked is to unhook one of the leads coming off of the COM port keyer...</blockquote>

[QUOTE="mr_fx, post: 504908, member: 22137"] I have been spending the last few hours trying to get DM780 to work with a COM port (RTS/DTS) keyer I built... It works fine on 432, 144, 50, and 28Mhz... However When I dropped down to 21 and 14Mhz and Key up it locks in transmit... NOTE: into a dummy load this does NOT happen I have not tried it into other rigs for this purpose, Also manually using the key does not lock into CW TX... another thing to note: I have also tried doing a continuity test into my Digital Volt/ohm meter, it worked great and was REALLY funny to listen to @ 100WPM lol This is the keyer I built [url]http://www.logger32.net/help/Logger32/Configuring%20Push%20To%20Talk.htm[/url] The only way to stop the radio from keying if if gets locked is to unhook one of the leads coming off of the COM port keyer... [/QUOTE]

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