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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
[EMAIL PROTECTED]
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- RE: [drakelist] DRAKE TR-7 TROUBLESHOOTING HELP N... K3PZ - PAUL
- RE: [drakelist] DRAKE TR-7 TROUBLESHOOTING H... Paul Rubin
- [drakelist] TR-7 Board Extraction Tool Joe Mann
- Re: [drakelist] TR-7 Board Extractio... Bob W7AVK
- RE: [drakelist] TR-7 Board Extra... Jammy
- Re: [drakelist] TR-7 Board ... Don and Diana Cunningham
- [drakelist] Help concerning SW-4... Jammy
- Re: [drakelist] TR-7 Board Extractio... James True N5ARW
- Re: [drakelist] DRAKE TR-7 TROUBLESHOOTING H... Don and Diana Cunningham

