[Milsurplus] [ARC5] Wire
J. Forster
jfor at quikus.com
Fri Sep 16 09:18:42 EDT 2011
Errrr...
These radios were used for war against the Germans and Japanese. Why do we
need to comply with our adversaries' standards??
:))
-John
==============
> These days you need to read much more than that... that's just the start.
> The
> USA is pretty straightforward but when you get to the EU, China, Japan,
> etc it
> gets really crazy with different "standards" sometimes even conflicting
> each other.
>
>
>
> On 9/15/2011 10:14 PM, J. Forster wrote:
>>> The outer coat is to reduce friction for pulling through conduit.
>> Yes.
>>
>> I've seen 16 and 18 AWG, but yeah, we get it 10,000 feet at a time on
>> big
>> spools.
>>
>> MTW may be available.
>>
>> Yes,
>>> printed with rating, it is required by the inspectors. If you are
>>> having
>>> trouble
>>> getting to sleep you can have a conversation about what the rating
>>> means
>>> with my
>>> safety and compliance guy.
>> Nah. I just read the NEC.
>>
>> -John
>>
>> ================
>>>
>>> On 9/15/2011 9:35 PM, J. Forster wrote:
>>>> Yes and no. It can be either nylon coated or not. Look at the spools
>>>> of
>>>> THHN at Home Depot or a similar place. THHN is mostly a temperature
>>>> spec.
>>>>
>>>> There are other options like MTW.
>>>>
>>>> Also, THHN in sizes smaller than #14 is hard to get. It may be
>>>> available
>>>> through an electronics supplier, but you probably have to buy 1000'
>>>> minimum.
>>>>
>>>> Finally, modern THHN is printed along its length. WW II wire was
>>>> generally
>>>> not, or if it was, it had circuit numbers on it.
>>>>
>>>> Best,
>>>>
>>>> -John
>>>>
>>>> ================
>>>>
>>>>
>>>>> Nylon coated PVC sounds like THHN electrical conduit wire.
>>>>>
>>>>>
>>>>>
>>>>> On 9/15/2011 9:12 PM, J. Forster wrote:
>>>>>> YW. It looks OK for chassis wiring, but, sadly, not for cables. I'm
>>>>>> not
>>>> sure there are any good alternatives to stranded Teflon in Expando
>>>>>> for cables. The nylon coated PVC seems to be very hard to get.
>>>>>> -John
>>>>>> ===============
>>>>>>> It may not be cheap but it's a heck of a lot easier. Thanks, John!
>>>> Best regards,
>>>>>>> Michael, WH7HG ex-K3MXO, ex-KN3MXO, WPE3ARS, BL01xh ex-Mensa A&P PP
>>>> BGI
>>>>>>> I am me. I’m the only one who’s qualified.
>>>>>>> http://www.nationalmssociety.org/chapters/NTH/index.aspx
>>>>>>> http://wh7hg.blogspot.com/
>>>>>>> http://kludges-other-blog.blogspot.com
>>>>>>> Hiki Nô!
>>>>>>> -----Original Message-----
>>>>>>> From: J. Forster [mailto:jfor at quikus.com]
>>>>>>> Sent: Thursday, 15 September, 2011 14:50
>>>>>>> To: h Kludge
>>>>>>> Cc: arc5 at mailman.qth.net; milsurplus at mailman.qth.net
>>>>>>> Subject: Re: [ARC5] Wire
>>>>>>> Not cheap, but:
>>>>>>> http://tubesandmore.com/Catalog/page_084_085.php
>>>>>>> -John
>>>>>>> ===========
>>>>>>>> In looking at the fabric over rubber wiring used way back when,
>>>>>>>> there
>>>> seem
>>>>>>>> to be two different flavors, one that has the fabric kind of loose
>>>> and
>>>>>>>> easily frayed and the other has the fabric somehow bonded to the
>>>>>>>> rubber
>>>>>>>> which reduces fraying and makes for neater work. Since I’m going
>>>>>>>> to
>>>>>>>> try
>>>>>>>> my
>>>>>>>> hand at making fabric over something wire in an attempt at making
>>>>>>>> things
>>>>>>>> appear even more authentic*, it would be nice to know how it was
>>>>>>>> done
>>>> originally. “Something” may wind up plastic, vinyl or Teflon
>>>> dependent
>>>>>>>> on
>>>>>>>> what I can get that looks right as to overall bulk.
>>>>>>>> * I may even try lacing in the tracers which would probably not be
>>>>>>>> good
>>>>>>>> therapy when they take me back to psych lockdown as a result of
>>>>>>>> this
>>>> activity. Nor would basket weaving. :-)
>>>>>>>> The way I think this will work is to use white older type flat
>>>> shoelaces,
>>>>>>>> wet them and force them over forms (read as: dowels) while they
>>>>>>>> dry
>>>> to
>>>>>>>> reduce or take out the creases. (This may also require a bit of
>>>> ironing.)
>>>>>>>> After that, introduce them to some RIT dye to get the right base
>>>>>>>> colors
>>>>>>>> for
>>>>>>>> color coded wiring and put them back over the forms to dry.
>>>>>>>> Assuming
>>>> (and
>>>>>>>> we all know what that word means) this works as planned, I may
>>>>>>>> actually
>>>>>>>> try
>>>>>>>> lacing in the tracers although it would be insanely time& labor
>>>> intensive
>>>>>>>> and only a few people would actually realize that the tracers are
>>>> supposed
>>>>>>>> to be there. I think all of them are in these lists. Anyway, a
>>>>>>>> little
>>>>>>>> yellow varnish to give it the official MFP look and I should have
>>>> wire
>>>>>>>> good
>>>>>>>> for open cables.
>>>>>>>> If the basic project goes well – i.e., the part about using
>>>>>>>> shoelaces to
>>>>>>>> make a reasonable facsimile of WW II cloth covered wire – the next
>>>>>>>> step
>>>>>>>> would be to use the same basic technique to make vinyl over white
>>>>>>>> woven
>>>>>>>> fabric over vinyl wiring used in later aircraft. I’m not sure I
>>>>>>>> know
>>>> what
>>>>>>>> to seal the fabric with but after that’s done the top coat can be
>>>>>>>> a
>>>>>>>> dip
>>>>>>>> in
>>>>>>>> Dip-It clear vinyl. If this works as I think it will, this will
>>>> solve
>>>>>>>> the
>>>>>>>> problem of wiring up the Type 12 equipment with more or less
>>>>>>>> period
>>>> appropriate open wire.
>>>>>>>> Using shoelaces presents two problems right off. First, the
>>>>>>>> prices
>>>> of
>>>>>>>> good
>>>>>>>> ones that don’t have the funky seams on each edge and are small
>>>> enough
>>>>>>>> have
>>>>>>>> gone out of sight. Second, it limits the size of any given run to
>>>> the
>>>>>>>> length of the longest laces I can find. On the other hand, for
>>>> everything
>>>>>>>> except the SCR-A*-183 I’ll be using open wiring as much as
>>>>>>>> possible,
>>>> mostly
>>>>>>>> because I like it but also because a good number of my connectors
>>>>>>>> are
>>>> for
>>>>>>>> open wiring and it’s easier to convert the ones that aren’t to
>>>>>>>> that
>>>>>>>> than
>>>>>>>> it
>>>>>>>> is the ones for open wiring to shielded cable.
>>>>>>>> So there it is. Thoughts?
>>>>>>>> Best regards,
>>>>>>>> Michael, WH7HG ex-K3MXO, ex-KN3MXO, WPE3ARS, BL01xh ex-Mensa A&P
>>>>>>>> PP
>>>>>>>> BGI
>>>>>>>> I am me. I’m the only one who’s qualified.
>>>>>>>> <http://www.nationalmssociety.org/chapters/NTH/index.aspx>
>>>>>>>> http://www.nationalmssociety.org/chapters/NTH/index.aspx
>>>>>>>> <http://wh7hg.blogspot.com/> http://wh7hg.blogspot.com/
>>>>>>>> <http://kludges-other-blog.blogspot.com/>
>>>>>>>> http://kludges-other-blog.blogspot.com
>>>>>>>> Hiki Nô!
>>>>>>>> ______________________________________________________________
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