Geoff -
Yes, you need a jumper cable if the 5-NB isn't installed.
It should be shielded wire or small coax, with Pin 2 the shield and Pin
4 the center conductor at both ends. Length isn't critical.
Those plugs can be very difficult to find. If you have an old octal
tube base, you could steal a couple of pins and make a patch cable with
just pins on each end, no shells, and fit it in place. I don't have a
connector handy, and the pins may be smaller than an octal pin. If so,
a short piece of brass tubing the correct diameter from the hobby shop
could be used.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
geoffrey mendelson wrote:
My SPR-4 has neither a noise blanker nor a jumper cable in it's place.
From what I can see it looks like it never had either of them. Is it
necessary?
If it is where do I get one? Can I just replace it with a length of
plastic insulated unshielded wire? Does it have to be shielded? Is the
lenght important?
TIA,
Geoff.
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