"John A. Stringer" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- Garey. Thank you for your helpful posting. I will investigate. John. GI3KDR
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Garey Barrell Sent: 09 June 2008 15:41 To: drakelist@zerobeat.net Subject: Re: FW: [drakelist] Drake TR7A with Acom 1ooo Linear Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- John - The TR-7 T/R switch is a fairly large mechanical relay, similar to the one in the T/TR-4 series. It's a 4PDT relay, and one contact controls the linear and another switches the Antenna from the receiver input to the PA output just after/before the Low Pass Filter module. So the T/R and Key functions are done by the same relay albeit by different contact sets. I suppose it's possible that the PA contact is "making" a little faster than the Linear contact. It might be possible to slightly bend the relay "arms" of the two sets of contacts to ensure that the Linear hits first, but ... The relay unplugs and is easy to open. You could see if the arms are already distorted the "wrong" way to cause the problem. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs <www.k4oah.com> John A. Stringer wrote: > "John A. Stringer" <[EMAIL PROTECTED]> made an utterance to the drakelist gang > ---------------------------------------------------------------------- > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of John A. Stringer > Sent: 05 June 2008 11:23 > To: drakelist@zerobeat.net > Subject: [drakelist] Drake TR7A with Acom 1ooo Linear > > > "John A. Stringer" <[EMAIL PROTECTED]> made an utterance to the > drakelist gang > ---------------------------------------------------------------------- > When I try using together the linear cuts out to protect it from hot > switching. Is there a modification anywhere to speed up the TR7 T/R switch > to overcome the problem? John GI3KDR > > > ---------------------------------------------------------------------- Submissions: drakelist@zerobeat.net 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 ---------------------------------------------------------------------- ---------------------------------------------------------------------- Submissions: drakelist@zerobeat.net 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 ----------------------------------------------------------------------
