[ARC5] T-17 Switch

[Mark K3MSB]

 Hi Bob

I need the SW-109 assembly. This morning I assumed that the contacts (which
I called the relay section) were just attached to the black Bakelite part
of SW-109. This afternoon I realized those attachment screws go completely
through the contact wafers. So, maybe the contact parts are available, but
I suspect I'll need the entire SW-109 assembly. Please see the attached
photo. Let me know if it doesn't make it through the reflector.

The shell of my mic says “Microphone T-17 14684-PHILIA-44”. The side is
stamped “SC5849A”. There is no other model information on the mic.

73 Mark K3MSB


On Sat, Aug 11, 2018 at 2:54 PM, Robert Downs <wa5cab at cs.com> wrote:

> Mark,
>
>
>
> All T-17’s are functionally interchangeable.  But there are several
> different models, that I know of
>
>
>
> T-17 (no suffix letter)
>
> T-17-B
>
> T-17-C (maybe)
>
> T-17-D
>
> T-17-E
>
> T-17-F
>
>
>
> Plus most were built on multiple Signal Corps Orders between at least 1929
> and 1954, with most being between 1941 (late 1940 Calendar Year) and June
> 1945.
>
>
>
> Those with the same model letter and Order Number can be counted on to
> have interchangeable parts.  Those with the same model letter but different
> Order Numbers usually have interchangeable parts.  Those with different
> model letters generally do not.
>
>
>
> Some were also built by the French on NATO contracts.  Parts from them are
> mostly not interchangeable with any of the US built ones.
>
>
>
> At any rate, if you want a part, you need to give the rest of the ID
> info.  And as there are no relays in a T-17, it isn’t clear at least to me
> what part you broke.
>
>
>
> Robert Downs
>
>
>
>
>
>
>
> Robert Downs
>
>
>
> *From:* arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net]
> *On Behalf Of *Mark K3MSB
> *Sent:* Saturday, August 11, 2018 10:50
> *To:* List Milsurplus; ARC5
> *Subject:* [ARC5] T-17 Switch
>
>
>
> I had never taken a T-17 microphone apart and thought the switch/relay
> assembly was a friction fit assembly.    As I gently tried to pry the relay
> section up, the Bakelite portion broke.
>
>
>
> So after it's busted I see how the switch is screwed in....
>
>
>
> By chance,  anybody have a spare button/relay (for 3 conductor cables)
> they'd care to sell?   A bust up mic with a good switch/relay would work
> too.
>
>
>
> Since the switch pushes against the relay arms,  I'm not sure just using
> JB Weld or similar would fix the break.   Anybody every do this
> successfully?
>
>
>
> Crud.......
>
>
>
> 73 Mark K3MSB
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20180811/d616d2f4/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: T17.jpg
Type: image/jpeg
Size: 130914 bytes
Desc: not available
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20180811/d616d2f4/attachment-0001.jpg>