10-01-2016, 09:51 AM
Yes, I suspect mine is a later one. As far as I can tell the 'Rotating Coil' method went out of fashion.
Keep at it, I've still got some Disc space
Alan
Keep at it, I've still got some Disc space
Alan
|
An interesting old Coil
|
|
10-01-2016, 10:34 AM
WW Sept. '29, looks an update regarding modifications to the coil in previous links...No Pics....WW magazine page 315, bottom left:
http://www.americanradiohistory.com/Arch...929-09.pdf Nothing in 1930's editions of WW in that archive, at least half the editions are missing for 1930. WW Sept. '31, British General 10 Khz Bandpass Unit, WW magazine page 332: http://www.americanradiohistory.com/Arch...931-09.pdf Lawrence.
10-01-2016, 10:53 AM
They certainly churned out a wide variety of different designs.
I guess there must have been Catalogues back in the day, now long gone. Alan
10-01-2016, 11:38 AM
WW Aug. '32....BG Radios, WW magazine page 189:
http://www.americanradiohistory.com/Arch...932-08.pdf Same mag....BG bandpass filters, WW page 190. Lawrence.
10-01-2016, 12:20 PM
More BG stuff, WW April '33 WW magazine page 276:
http://www.americanradiohistory.com/Arch...933-04.pdf I've a feeling the coil we need is in the missing editions of 1930, I'll finish off 1933, there's only one 1934, that coil is unlikely to be after that. Lawrence.
10-01-2016, 01:06 PM
(10-01-2016, 12:20 PM)pwdrive Wrote: I've a feeling the coil we need is in the missing editions of 1930, I'll finish off 1933, there's only one 1934, that coil is unlikely to be after that. I fear you may well be right. By 1934 it looks as though things were becoming simpler, with a straightforward L and M Winding, much like some of the other Coils I have. Alan
10-01-2016, 01:19 PM
I might have asked this before.....Is it possible to reverse engineer it circuit wise?
Lawrence.
10-01-2016, 03:19 PM
You did, see Post #122, but don't worry about it.
I keep pondering on how I might achieve same. Alan
21-01-2016, 11:12 AM
Alan, scroll down once link is opened, no schematic but a genuine advert:
http://www.vintage-radio.net/forum/showt...p?p=815856&posted=1#post815856 Lawrence.
22-01-2016, 11:39 AM
Unbelievably, I’ve had a day to myself. I’ve got an allwave and two other British General coils – one is in circuit and works well. The one you have is the all wave and my one is broken – ie the selector has snapped off. If you want I could post it to you so you could take it apart (reverse engineer) and play?
I have also looked through the missing editions of 1930 and can’t see it. There is one that is along similar lines though. |
| Users browsing this thread: |
| 1 Guest(s) |