Hello Don, The transverter uses one relay contact (K1) to disconnect the antenna input from the Q3 input transistor during TX. I understand there will be a small delay before the full 20W output power is available on the RX/TX relay to the antenna. Still I doubt it is capable of doing full break-in (tx-rx delay menu set at 0) with dots at 20wpm and not suffer from any timing issue. The antenna was correctly connected. But then again I can and will certainly not try to repeat this error.
73 Mark, PA5MW ----- Original Message ----- From: "W3FPR - Don Wilhelm" <[EMAIL PROTECTED]> To: "Mark_van_Wijk" <[EMAIL PROTECTED]>; <[email protected]> Sent: Friday, July 15, 2005 22:05 Subject: RE: [Elecraft] Front end FET of transverter blown with CW configured K2 > Mark, > > Either you did not correctly describe the situation, but that transverter > must work in CW mode too, and yes, it makes no difference whether the CW dot > paddle or the PTT switch is presses when in CW mode, a string of dots should > emerge. > > The XV50 transverter should be able to follow the T/R switching of the K2 > with no problem and no damage to the transverter, unless you have some > strange connection on the antenna side of the transverter. > > 73, > Don W3FPR > > > -----Original Message----- > > > > > OK, guess Murphy forced me to screw up twice this week :)) > > So another mistake I would like to share with you all. > > > > Observation: > > 20dB lost in receiver performance at your transverter, no C1 adjustment > > possible (Elecraft XV50 kit) > > > > Cause: > > Q3 PHEMT ATF34143 defective > > > > How did I manage that: > > K2 configured in CW , with no RX delay and Iambic keyer set in the menu. > > The PTT line from your mic is also the 'dot' line for your internal keyer. > > When pressing the mic's PTT in CW mode, the K2 starts sending dots in full > > BK. > > Your transverter will try to follow the quick TX/RX switching , but since > > there is also little or no RX delay, the front end FET will go to heaven. > > Normally you would not press the mic while in CW mode, but trying > > to locate > > my other mistake (max ALC reading in SSB) I > > Both my A and B version K2's do this. > > Again human error here, but we're learning :)) > > > > '73 Mark, PA5MW > > > -- > No virus found in this outgoing message. > Checked by AVG Anti-Virus. > Version: 7.0.323 / Virus Database: 267.8.15/49 - Release Date: 7/14/2005 > > > __________ NOD32 1.1170 (20050715) Information __________ > > This message was checked by NOD32 antivirus system. > http://www.eset.com > > _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
