On 2024-03-12 09:13, Jerry Kessler wrote:
What is the name/description, manufacturer, and part number of these
coaxial connectors?
*** I'm guessing they're made by the Unobtanium corporation.
In my radio, I mostly have trouble with the outer ground clip, which gets
loosy-goosy on cables that get plugged and unplugged. Especially the
cable that comes through that hole in the DR7.
- Jerry, KF6VB
Also, what is the particular coaxial cable or cables that are
compatible with these connectors?
Thanks/73,
Jerry, N4JL
FROM: [email protected] <[email protected]> ON BEHALF OF Glenn
Hetchler WB0DKT
SENT: Tuesday, March 12, 2024 12:01 AM
TO: [email protected]
SUBJECT: [DRAKE-RADIO] Item to check on TR7 plug-in coax connections
A friend who is a new ham and I have taken on a project TR7 in hopes
of getting it on the air for him. I have enjoyed mine for 40 years.
As we were doing inspection of the plug-in boards (well aware of the
many and varied connector issues) we came across an issue with a
plug-in coax that I cannot remember seeing discussed before (or at
least recently), so I thought I would warn others. It happened to be
on the noise blanker filler board, but could have been on any of them.
That board looked untouched from the factory, so I have to believe it
was built that way. The coax connector had the ground assembly that
the cable plugs into, but I was stunned to see that there was no
female socket for the coax center wire to plug into. It seems that
because the coax was pushed at an angle from being in the shield cage,
that the side force on the wire is all that made the center conductor
touch the (unsoldered) plated through hole on the circuit board. There
was no indication that any repair soldering (or unsoldering) had been
done in that area.
Very luckily a friend who had been winding down his Drake collection a
while back had offered me a few of the connector parts that he had
acquired during his years of working on TR7s, as he knew I was trying
to keep mine (OK, more than just one TR7 :) going. So I had exactly
the center wire socket for us to push into the circuit board with a
tweezers through the center of the ground connector, hold against the
board with a small screwdriver and then apply solder on the bottom
side. I have no idea where those connector parts could be obtained
these days. If anyone does know of a supplier, please reply to this
thread.
So now when inspecting the boards and their connectors, make sure the
coax connectors have all their parts. If Drake forgot to install it on
one board, there may be other ones out there with the same issue. It
was by luck that I saw it when unplugging the coax; it would have been
easy to miss.
73,
-Glenn/ WB0DKT
Links:
------
[1] /g/DRAKE-RADIO/message/76670
[2] /mt/104879045/243852
[3] /g/DRAKE-RADIO/post
[4] /g/DRAKE-RADIO/editsub/243852
[5] /g/DRAKE-RADIO/leave/12260778/243852/767576506/xyzzy
