From: "Don and Diana Cunningham" 
Subject: Re: [drakelist] DRAKE TR-7 TROUBLESHOOTING HELP NEEDED


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Paul,
For the lost audio, look at the coax you plugged into the filter board =
(on the left side, looking from the front of the rig).  I've had that =
coax center lead short to the metal partition when I inserted it wrong =
and that definitely kills the audio. =20
73,
Don, WB5HAK
  ----- Original Message -----=20
  From: K3PZ - PAUL=20
  To: drakelist{at}zerobeat.net=20
  Sent: Monday, March 15, 2004 9:04 PM
  Subject: [drakelist] DRAKE TR-7 TROUBLESHOOTING HELP NEEDED


  I had a perfectly functioning Drake TR-7.  I removed the NB-7 & Filter =
board to put in to another TR-7. I then installed a NB dummy card and =
filter board with stock filters back in to the original TR-7. When I =
powered it back on, it would not work properly. I think I may have been =
off 1 pin when I inserted the NB dummy card.
  The symptoms are: No audio at all, it is completely dead. On bands 160 =
- 20 meters the display cycles at approximately 17Mhz and will not lock. =
On bands 15 - 10 meters the display will cycle at approximately 33Mhz =
and will not lock. When I key the radio up in CW mode, the output seems =
fine 100 watts+ on all bands. I'm not sure exactly where to check =
voltages but on the bottom of the parent boad, the +10v seems OK. The =
+5v also seems OK.  There is also a +10T and a +10R which are both close =
to 0V. Not sure where to go next with this.  Any help would be greatly =
appreciated. Thanks in advance.

  Paul
  K3PZ
  k3pz{at}adelphia.net



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Paul,
For the lost audio, look at the coax =
you plugged=20
into the filter board (on the left side, looking from the front of the=20
rig).  I've had that coax center lead short to the metal partition =
when I=20
inserted it wrong and that definitely kills the audio.  =

73,
Don, WB5HAK

  ----- Original Message
----- 
  From:=20
  K3PZ">mailto:k3pz{at}adelphia.net">K3PZ - =
PAUL=20
  
  To: drakelist{at}zerobeat.net">mailto:drakelist{at}zerobeat.net">drakelist{at}zerobeat.net
=

  Sent:
Monday, March 15, 2004 =
9:04=20
PM
  
Subject: [drakelist] DRAKE TR-7 =

  TROUBLESHOOTING HELP NEEDED
  
  I had a perfectly functioning Drake =
TR-7.  I=20
  removed the NB-7 & Filter board to put in to another TR-7. I then=20
  installed a NB dummy card and filter board with stock filters =
back in=20
  to the original TR-7. When I powered it back on, it would not =
work=20
  properly. I think I may have been off 1 pin when I inserted the NB =
dummy=20
  card.
  The symptoms are: No audio
at all, it =
is=20
  completely dead. On bands 160 - 20 meters the display cycles at=20

---