[Milsurplus] I-177 Tube Tester

[Henry Mei'l's]

Some years ago I found that some of the switch contacts were not making 
contact in my I-177.
I simply bent the contact reed into the correct position -- don't remember 
precisely which switch or what the
fault was before but I may have made a note of it. My unit also reads too 
low mu values but I think I know
where the fault lies.

Henry, OZ3O  N2NR

----- Original Message ----- 
From: <milsurplus-request at mailman.qth.net>
To: <milsurplus at mailman.qth.net>
Sent: Thursday, March 31, 2011 6:00 PM
Subject: Milsurplus Digest, Vol 83, Issue 42


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> Today's Topics:
>
>   1. FS: RU-16 Dynamotor (J ALLEN CALL)
>   2. Re: FS: RU-16 Dynamotor (WA5CAB at cs.com)
>   3. ELDICO transmitter update - Parts search - dual FT 243 socket
>      (Greg Mijal)
>   4. Re: Fixing up an I-177B tube tester (Ian Wilson)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 30 Mar 2011 21:41:34 +0000
> From: J ALLEN CALL <w7ksg at q.com>
> Subject: [Milsurplus] FS: RU-16 Dynamotor
> To: <milsurplus at mailman.qth.net>
> Message-ID: <SNT127-W302507D5DA3419E4D4B95FFBBC0 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
>
>
> A clean RU-16 dynamotor part of RU-16 a unit of  U.S. Navy Aircraft Radio 
> Receiver.  CW-21109A.  Comes with both input and
> output connectors. Cannot check it out.  Has mounting base with fasteners 
> .  AS IS $75.00 plus shipping.  It is heavy.
>
> J
> W7KSG
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 30 Mar 2011 18:42:37 EDT
> From: WA5CAB at cs.com
> Subject: Re: [Milsurplus] FS: RU-16 Dynamotor
> To: milsurplus at mailman.qth.net
> Message-ID: <d427e.25072a29.3ac50bdd at cs.com>
> Content-Type: text/plain; charset="US-ASCII"
>
> J forgot to add that this dynamotor also runs the associated GF-11.
>
> In a message dated 3/30/2011 4:41:37 PM Central Daylight Time, w7ksg at q.com
> writes:
>> A clean RU-16 dynamotor part of RU-16 a unit of  U.S. Navy Aircraft Radio
>> Receiver.  CW-21109A.  Comes with both input and
>> output connectors. Cannot check it out.  Has mounting base with fasteners
>> .  AS IS $75.00 plus shipping.  It is heavy.
>>
>> J
>> W7KSG
>
> Robert & Susan Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
>
>
> ------------------------------
>
> Message: 3
> Date: Wed, 30 Mar 2011 23:07:15 -0400
> From: "Greg Mijal" <bluebirdtele at embarqmail.com>
> Subject: [Milsurplus] ELDICO transmitter update - Parts search - dual
> FT 243 socket
> To: <boatanchors at mailman.qth.net>
> Cc: eldico at mailman.qth.net, milsurplus at mailman.qth.net
> Message-ID: <B8D2DD203A374F98BDCD6D9871B6947A at userdff40e0b99>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi:
> The Eldico TR??? transmitter I bought on Ebay arrived today.
> The seller did a good job packing and no damage found.
> I went into my Garage junk box and found the right 10x7 chassis cover 
> (shroud?).
> Tubes supplied with the rig are 5U4 6AG7 807
> I'm still not exactly sure which model transmitter I bought.
> Also, I am looking to buy or trade for a dual FT 243 chassis mount crystal 
> socket.
> Please emal me for a picture if you want to do the model ID.
> Thanks!
> Greg
> WA7LYO
> Kinston NC
>
> ------------------------------
>
> Message: 4
> Date: Thu, 31 Mar 2011 08:41:06 -0700
> From: Ian Wilson <ianmwilson73 at gmail.com>
> Subject: Re: [Milsurplus] Fixing up an I-177B tube tester
> To: milsurplus at mailman.qth.net
> Message-ID:
> <AANLkTikPOKWACnQuh=_BjwC934nQQk2g_uVVN++FMGYN at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> I cleaned the wafer switches with an aerosol switch cleaner.
> Now there is some life but still bad news:
>
> In Tube Test position, when I depress the AMPL switch, the
> Fuse light comes on brightly and the meter makes a loud buzzing
> noise. The average position of the needle is about 1/4 way up the red
> region.
>
> This happens whether I have a tube in the socket or not.
>
> I have things set up for testing a 12A6 (not that it makes any 
> difference).
>
> With power off, the resistances around the rectifier sections and the L/R
> pots
> all seem consistent with the schematic.
>
> Any ideas what to look for?
>
> 73, ian K3IMW
>
>
> ------------------------------
>
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> End of Milsurplus Digest, Vol 83, Issue 42
> ******************************************