[Boatanchors] Hallicrafters SX-28 S-meter

[rrkrr]

I have 2 SX-28s.  Both have this problem.  In fact, every SX-28 I've 
ever seen has this problem.  It looks like the meter exploded.  It's 
clearly from stress fractures in the brass.  Evidently the meter 
manufacturer was too busy turning out their quota during the war to take 
time to anneal the brass cylinder after forming it - and for that matter 
who can blame them?  Hose clamps and pieces of large diameter black heat 
shrink tubing cured mine.

Bob K4ERR
> Yes, it did crack on its own.  I think the actual mechanism was "stress
> corrosion cracking" due to internal stresses as Drew mentioned.  Deep
> drawing causes extreme stresses, it's not uncommon.  Most SX-28 meters I've
> ever seen were that way, plus some others.
> 73,
> Al, W8UT
> (many yrs in the aluminum production/manufacturing industry)
>
> ----- Original Message -----
> From: "david knepper" <collinsradio at adelphia.net>>
> OK, tell me that the metal split on its own!
>   
>> Dave, W3ST/W3CRA
>>     
>>> Drew Papanek wrote:
>>>       
>>>> Hi All,
>>>>
>>>> I have a Hallicrafters SX-28 whose S meter housing has split open,
>>>> looking like the staves on a barrel. Evidently the brass was not
>>>>         
> annealed
>   
>>>> sufficiently at manufacture and internal stresses took over......
>>>>
>>>>         
>
>
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