[Test-Equipment] HP141T

Thu, 17 Jul 2003 15:04:46 -0500

Andreas: I've been through this recently and have found all of them but one.
The connectors that
I never found were the ones for the preselector. I ended up making them by
removing the appropriate pins from a D connector. I drilled the connector to
accept the coaxial pins and epoxied them into place. It works like a champ.
The sources for the others are contained in a previous email to someone. I
cut and pasted it below:

 The between connector (between the if and rf section) came from Newark. The
following is a cut and paste  from the invoice.

 Newark Part Number: 97F9281
 Manufacturer Part Number: DDM-43W2PT1
  Manufacturer Name: CINCH
Description: 1 SERIES 0.109'' (2.77) DENSITY D-SUB COAXIAL/SOLDER CUP
COMBINATION LAYOUT CONN
Quantity Units: EA1
Comment:
Quantity: 1
Unit-Price: $10.12
Extension: $10.12

Newark Part Number: 97F9282
Manufacturer Part Number: DDM-43W2ST
Manufacturer Name: CINCH
Description: 1 SERIES 0.109'' (2.77) DENSITY D-SUB COAXIAL/SOLDER CUP
COMBINATION LAYOUT CONN
Quantity Units: EA1
Comment:
Quantity: 1
Unit-Pricek: $15.66
Extension: $15.66
>
 I had already purchased contacts from Mouser. They were the crimp type but
they soldered up just fine.

The big blue ones are called McMurdo connectors, also known as "26
series". Newark carries them but they are a bit costly. The Newark part
number is
42FX184 and 42FX188 for the male and female. They are manufactured by WPI.
The WPI numbers are 26-4100-24P and 26-4200-24S. Cost is $23.86 and
$28.15!

!! !!! You should probably look for a junk 140 series oscilloscopes to get
 these. I found one for a dollar at a local ham auction. I might have
already
 told you about that. I got the damn thing working and then didn't have the
heart to junk it for parts. I just got lucky and found what I needed
elsewheres.

I found one two males and one female at a local surplus shop and found the
last one in my junk box after looking all over the world for one. You really
only need one of these cables. It is unlikely that you will have to have the
if and rf sections out at the same time.

 There are some folks that sell these cables already made up. Check out
http://www.glkinst.com/ . I might have to resort to them to get the
preselector cable.

Mouser had the 8W8's needed for the 8443 tracking generator. They are part
numbers 152-FM8W8P and 152-FM8W8S. Mouser doesn't tell the manufacturer or
give the manufacturer's part number. The ones I got were made by FCT, a
German company.

The 8444 tracking generator uses BNC cables with the 8554 rf section. One of
these signals is not present with the 8555. The signal is picked off one of
the D connectors on the back of the 141. I forget which one. I've used mine
only with the 8554 and don't intend on using it with the 8555.

Newark had the one for the storage normalizer. Newark part number is
93F8913. It is manufactured by Cannon/ITT and their part number is
DDM24W7PK87. You only need a male. The spectrum analyzer end gets BNC's.

Now if I could only find a source for 17W5's for the preselector  .........
>

----- Original Message ----- 
From: "Andreas Troschka - IK2WQI" <[email protected]>
To: <[email protected]>
Sent: Thursday, July 17, 2003 10:01 AM
Subject: [Test-Equipment] HP141T

> Hello folks,
> I've acquired a couple of HP141T Spectrum Analyzer Mainframes and a bunch
of
> plugins and accessories.
> The bad news are:
> a) some of the mainframe's 24 pin female connectors (that accepting the
> plug-ins connections) have irreparable damages;
> b) I couldn't find any connection cable for the external units.
>
> The connectors in a) should be part #HP1251-0054 as from service manual.
> The cables in b) are:
> .Tracking generator's; don't know the model # for this cables I'm still
> looking for the service manuals
> .HP8750A Storage normalizer cable model should be #HP08750-60034
>
> Anybody out there can help me?
>
> -- 
>
>
> Cheers.
>
> Andreas Troschka - IK2WQI - JN45OL
>
> --
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