[NJARC] speaking of microscopes......

[Bill Zukowski]

 From April QST.

Bill Zukowski

On 3/22/2017 7:40 PM, Pete O via NJARC wrote:
> Just remember
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
>
>
> It's been my experience that the break in those Philco coils is where 
> the outer winding makes a 90 degree bend and then down to the solder 
> lug.  If it is this outer winding, carefully lift it up out of the wax 
> until you get to the bend. It's part of the coil winding process that 
> puts strain on the bend. Removing that one turn won't hurt anything. A 
> stereo microscope really helps along with some dental tools.
>
> If you are really desperate, you can send the coil to me and I'll 
> check it out under the microscope. No guarantees though.
>
> Pete Olin
>
>
> ------------------------------------------------------------------------
> *From:* TrainBee via NJARC <njarc at mailman.qth.net>
> *To:* njarc at mailman.qth.net
> *Sent:* Wednesday, March 22, 2017 5:28 PM
> *Subject:* [NJARC] Philco 60 Antenna Coil - Open
>
> Does anyone have any experience with rewinding an Antenna Coil (IF) 
> for a Philco 60? How about another Philco of similar vintage? I have 
> one that has an open winding between terminals 2 and 3.  If not, have 
> you ever rewound a coil and could give some advise?  I'm pretty sure I 
> have the problem narrowed down.  There is no signal generated by the 
> LO and no voltage readings from either terminal 2 or 3.  The ohms 
> readings between the top lug and # 4 isn't close, but at least there 
> is something.  I'm also getting a reading between terminals 1 and 6. 
> Once again, it's not close to the schematic.
>
> I'd prefer to not rewind the entire coil.  But, if in your experience, 
> this is what's needed, then I'll give it a try.  I've seen the info on 
> Ron Ramirez's site and I'm hoping I can get some more shared 
> experience from our members.  The Philco 60 I am working on is from 
> the Sept. 1934 production run.  It incorporated quite a few of the 
> improvements that Philco had for this radio.
>
> Thanks in advance for your help.
>
> Joe Devonshire
>
>
> Just remember
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
> ______________________________________________________________
> NJARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/njarc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:NJARC at mailman.qth.net <mailto:NJARC at mailman.qth.net>
>
> This list hosted by: http://www.qsl.net <http://www.qsl.net/>
> Please help support this email list: http://www.qsl.net/donate.html
>
>
>
> ______________________________________________________________
> NJARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/njarc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:NJARC at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/mailman/private/njarc/attachments/20170322/9ef1e23c/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: QST microscope.docx
Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
Size: 548541 bytes
Desc: not available
URL: <http://mailman.qth.net/mailman/private/njarc/attachments/20170322/9ef1e23c/attachment-0001.docx>