[Milsurplus] Need a part for a HP-8553B plug-in

[Glenn Little WB4UIV]

I checked my inventory of spare parts modules and find that I have two 8553=
=20
chassis. One is missing the same connector that is needed here. This module=
=20
has a short jumper that would plug onto the input connector and goes to the=
=20
input attenuator. This jumper appears the correct length to connect the=20
input connector to the attenuator without being short. The other module=20
that I have has a 75 Ohm input. This looks like an instrumentation 75 Ohm=20
connector. There is an inline module between the 75 Ohm input connector and=
=20
the input attenuator. Possibly this is the impedance transformation.

Possibly this should be addressed to the test equipment reflector?

73
Glenn
WB4UIV


  At 09:37 AM 03/07/04 -0600, aGEnuine Ham wrote:
>Ed:
>
>The manual is confusing, and I have not had access to pull my 8553 out of
>the 141 to confirm any of this.  In any event, the connector appears to
>be a BNC to SMB, but there is a 3.9 =B5f blocking capacitor in there
>somewhere before the input filter, and it is very unclear exactly where
>it is physically located, except it is called module A12.
>
>While those BNC to SMB connectors are still around and were used in a lot
>of HP gear, they are nothing special, and any good panel BNC could be
>installed and connected to the pigtail which goes to the A12 module.
>With a top end of 110 MHz, it is pretty forgiving.
>
>The manuals appear regularly on that E place, BTW, although I hear some
>of the CDs are not of the best quality.
>
>Good luck!
>
>George
>W5VPQ
>
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