Bob -
No, the KEY jack is the "standard" 0.25" dia PHONE jack. MUCH easier
connector to find, Radio Shack almost certainly still has them.
Grid Block keying means that your key has to switch a NEGATIVE voltage
to ground, which means either a relay contact or typically a PNP
transistor. Most "modern" rigs have a POSITIVE voltage on the key jack,
and most keyers have provision for both, usually with an internal
jumper. Some have separate output jacks, one for positive keying, the
other for negative.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
<www.k4oah.com>
AD5VJ Bob wrote:
I was able to come up with an orignal .210 inch connector for the mic plug on
my TR-3. I am looking in the manual and it doesn't say
if the same (Switchcraft S-230) .210 inch diameter type of connector is used
for the cw key or not.
Does anyone know if they are both the same type of connector? Also, I may end
up using an automatic keyer that I built out of a kit
with it, but have not seen anything in the manual on my kit concerning 'grid
block keying'. Is there a special kind of keyer I have
to use with this rig?
Bob AD5VJ
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