[GreenKeys] M19 Selector Magnet - magic smoke?

[Jim Cooper]

On 3 Aug 2021 at 8:04, John W9DDD wrote:

> Wondering where you read 550?



Page 2-11 of Bulletin 1082B Parts, Typing Reperforator 
(Model 14)  ©1957  August 1957


> Also one finds older literature for the 207M shows 92, newer shows
> 100 ohms.  Perhaps they decided to add a few turns, but kept the
> same P/N.  I also find it strange that coils seems to be the only
> part that kept a letter as part of the P/N.  Now that I think of it,
> bare wire will have a color suffix. 
> 
> John, W9DDD
> 
> 
> > On Aug 2, 2021, at 4:48 PM, Jim Cooper <jim.w2jc at gmail.com>
> wrote:
> > 
> >> On 2 Aug 2021 at 13:39, John W9DDD wrote:
> >> 
> >> M207 and 207M should be the same
> >> part.  The resistance difference can
> >> be a combination typos and whether
> >> it's measured installed in parallel
> >> with another.
> > 
> > I can understand the pre- and post- numbering.
> > 
> >> Our friendly navy-radio chart for
> >> coils says a single 207M is 100 ohms.
> >> Two in parallel would be 50.  
> > 
> > But the specs clearly specify "per coil" ... 
> > and 550 ohms is an awkward typo to explain 
> > compared to either 105 ohms or 92 ohms. 
> > Something is amiss ...  
> > 
> > Dare I offer the M-14 FPR  207M coil(s) 
> > as replacement for the M-15  M-207 coils? 
> > 
> > If so, John -- contact me by email -- you can 
> > have either the whole 'junk' reperf for parts, 
> > or just the selector magnets ... for just the 
> > postage.  
> > 
> > Jim  w2jc 
> > 
> > 
> > 
> 


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20210803/bd608c32/attachment-0001.html>
-------------- next part --------------
The following section of this message contains a file attachment
prepared for transmission using the Internet MIME message format.
If you are using Pegasus Mail, or any other MIME-compliant system,
you should be able to save it or view it from within your mailer.
If you cannot, please ask your system administrator for assistance.

   ---- File information -----------
     File:  hts_1.PNG
     Date:  3 Aug 2021, 11:50
     Size:  118663 bytes.
     Type:  Unknown
-------------- next part --------------
A non-text attachment was scrubbed...
Name: hts_1.PNG
Type: application/octet-stream
Size: 118663 bytes
Desc: not available
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20210803/bd608c32/attachment-0001.obj>