[HBR] 24-5P Molded Coil Forms

[William Wood]

Here’s at least a start to the SW 3 info gathering
73 fer now
Bill  KE9XQ

http://www.antiqueradios.org/gazette/SWevol.htm



On Nov 8, 2016, at 11:07 AM, Rob <roomberg at ptd.net> wrote:

> Can you point to any magazine article that shows how to build this SW-3?
> 
> On 11/08/2016 11:46 AM, Jim Hill wrote:
>> At 07:32 AM 11/3/2016, Paul Dulaff wrote:
>> If additional coil sales would reduce startup costs, I suggest you also look into manufacturing National SW-3 coil forms.  The SW-3 was a regenerative receiver sold in the early 30's, and is currently a very desirable item.  It uses a 6-pin coil form with normal pin diameters, but with different pin spacing (since the receiver was designed and originally sold before 6-pin tubes were available).  If you are interested, I'll provide details.
>> Jim
>> 
>> At 07:32 AM 11/3/2016, Paul Dulaff wrote:
>>> All
>>> Looking at the potential for tooling up, in a low cost way, the HBR coil form. This would be an exact piece, injection molded clear styrene with 5 pins, ti