[1000mp] More info on MkV blown front end.

lhlousek [email protected]
Sat, 6 Sep 2003 19:32:49 -0700 

Hi Hans,

Good to hear from you!  I'm working in the San Jose, California area now =
so am away from home all week.  I had to put troubleshooting my MkV =
aside until I returned home for the weekend.  As you can see by the =
email I posted to the 1000MP reflector, I have it fixed now.  It was a =
lot of work to get into that part of the rig and put it back together.  =
It would be good if I could come up with some sort of protection scheme =
that would prevent that from happing again.  If I do come up with =
something I'll post it on the reflector.

Hope to CU on the air again.

Lou W7HV
  ----- Original Message -----=20
  From: [email protected]=20
  To: [email protected]=20
  Sent: Sunday, August 31, 2003 9:58 PM
  Subject: Re: [1000mp] More info on MkV blown front end.


  Hello Lou,

  Very interesting and kind of you to inform us about this malfunction! =
It may
  happen with other MkV's as well.

  Good luck in finding and fixing it.

  Looking forward to another CW QSO with you!


  73, Hans Remeeus.
  Ham Radio: PA1HR
  www.remeeus.nl

  Communication is about people, the rest is technology.


  ----- Original Message -----
  From: "lhlousek" <[email protected]>
  To: "1000mp list" <[email protected]>
  Sent: Monday, September 01, 2003 6:08 AM
  Subject: [1000mp] More info on MkV blown front end.


  I did some troubleshooting.  There is a T/R circuit at the antenna =
input to
  the rig that employs three transistors, a pin diode switch,  and a =
relay.
  The relay isn't being activated. I can make the relay work by =
supplying 12V
  to it and the rigs receives fine.  The PNP transistor that operates =
the
  relay is either blown or isn't getting the correct input to switch the
  relay. I need to do some more signal tracing to see if I can figure =
out
  what's going on.

  Lou W7HV


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