noise blankers that are 'plug-in' for collins are made by Wynn Works.
Perhaps they can be modified for the Drake.
David Goncalves
W1EUJ
On Sat, Jan 23, 2010 at 11:33 AM, Curt Nixon cptc...@flash.net wrote:
Is there a source for boards / cloning info for the 34PNB Noise Blanker for
the TR4?
OK and thanks to all. I just got back home and am going to try the T4Xb
troubleshooting again this weekend. Will pull the finals and see if that is
what is pulling the 250 B+ down. The R3 was in the AC4 sorry for not noting
this before. I looked at the old one and the schematic and was reading
Have good bias (-55 adjustable up - or down - to -75V) at rear plug - and on PS
sub board, but nothing getting to finals - any good ideas where to look first?
Michael
W7HUT
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Paul -
Couple of things. One, be careful using a larger fuse than the 8 Amp
original. That fuse is to protect the wiring harness in case of a
filament short. Melted harness = parts radio. The early units used a
piece of #30 wire instead of a fuse.
There aren't many places in the
Michael -
Shorted V1, shorted C63.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs
www.k4oah.com
Michael Ditmore wrote:
Have good bias (-55 adjustable up - or down - to -75V) at rear plug - and on PS
sub board, but nothing getting to finals - any good
Paul -
I realized I used the wrong number for the fuse wire. I actually use a single strand of 18-2 ZIP
cord, which I think is #33.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs
www.k4oah.com
Paul Gerhardt wrote:
OK and thanks to all. I just got
I have an interesting problem to present to the group.
I'm in the process of restoring a later model R-4C that has a peculiar audio
problem. The receiver is working fine with excellent sensitivity on all bands,
except that on 80m when I turn on the crystal calibrator, I hear what appear to
be
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