[Milsurplus] Unsoldered joints...

George Babits gbabits at custertel.net
Mon May 15 13:33:33 EDT 2017


well, at least there was some semblence of quality control.  It is non 
existant today.

73,
George
W7HDL


----- Original Message ----- 
From: "Glenn Little WB4UIV" <glennmaillist at bellsouth.net>
To: <milsurplus at mailman.qth.net>
Sent: Monday, May 15, 2017 11:23 AM
Subject: Re: [Milsurplus] Unsoldered joints...


> Many years ago, I got a very beat up KWM-2 chassis from the scrap yard.
> I had thoughts of making it work again.
> That never happened.
> While removing usable parts from the chassis, I found the reason it made 
> it to the scrap yard.
> A wire was looped through a tube socket pin and crimped.
> No solder, but, there was red paint on where the solder should be showing 
> that it was inspected.
> So much for QC, I guess it really means Quick Check.
>
> 73
> Glenn
> WB4UIV
>
>
> On 5/15/2017 11:44 AM, w4thq at cox.net wrote:
>> During the 1960's, NASA issued a Soldering Spec. that eliminated twisting 
>> wires around terminals.  The requirement for making solder joints that 
>> depended only on the solder making the connection allowed bad 
>> terminations to be readily identified.
>> John  W4THQ
>>
>>
>>
>> ---- "Kenneth G. Gordon" <kgordon2006 at frontier.com> wrote:
>>
>> =============
>> On 15 May 2017 at 7:25, George Babits wrote:
>>
>>> Un-soldered joints happened all the time.  Nothing unique to surplus, or 
>>> any
>>> specific radio.  I had a Collins 32S-1 with an un-findable intermittent.
>>> Finally found that one connection INSIDE one of the IF transformers had
>>> never been soldered.
>>
>> When I was working as an electronic tech at the University of Montana, 
>> one of our professors
>> had a very, very expensive Phillips research X-ray machine which would 
>> intermittantly shut
>> down.
>>
>> That thing had something like 90 tubes in it.
>>
>> After a long night of digging into it, I found a no-solder joint on a 
>> filament connection to a
>> critical tube socket in the power supply section buried at the very 
>> bottom of the unit, under at
>> least 4 layers of wiring.
>>
>> I was pissed and the professor was pleased.
>>
>> Ken W7EKB
>>
>> ---
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>
> -- 
> -----------------------------------------------------------------------
> Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
> Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
> QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE ARRL TAPR
> "It is not the class of license that the Amateur holds but the class
> of the Amateur that holds the license"
> ---------------------------------------------------------------------------
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