I understood your explanations Chuck.
I will do this today, and I will return with the result.
With much hope of being something simple, like bad contact.
In this case, the hybrid is the U500, correct?
From: Chuck Harris
Sent: Wednesday, February 26, 2020 2:54 PM
Subject: Re: [TekScopes] Tektronix 2467B Auto Measure Faulty?
It doesn't take much care to work with the
"finned" hybrids. They each have 4, #4-40 nuts,
with captive star lock washers, that hold them
to the socket. Some of the hybrids use a hex
standoff as one of the nuts...
To remove the nuts, either use a finger to
press the middle of the hybrid, and just spin
the nuts off, or if that is too many hands,
remove two diagonal nuts, and then loosen the
remaining two diagonal nuts 3 or 4 turns at a
To put the hybrids back, you will need to use
both hands. One to arrange, and press the
hybrid into the socket, so its aluminum fins
contact the board on all sides.. and at the
same time, put on a diagonal pair of nuts to
finger tight. I use a plastic nut starter to
make this easier. The nut starter stretches to
fit the nut snugly, when you press it onto a nut
that is laying on your bench...
Then the other diagonal pair, and then tighten
all 4 nuts to just 1/4 turn past contact.
The only danger to the hybrids is if you tighten
the nuts when one side is hung up... that will break
the ceramic substrate. That is why you hold the
hybrid down against the board before you put on
a diagonal pair of nuts.
leandro.lindemann via Groups.Io wrote: