An interesting old Coil

[pwdrive]

Alan, have you figured out the wiring yet for the one you have?

Lawrence.

[AlanBeckett]

No Lawrence. I don't think I can get any further without disconnecting Wires which I'm reluctant to do.
I'm thinking of chucking some Wire out of the window and trying a Crystal Set.

Alan

[AlanBeckett]

As promised I've chucked some Wire out of the Window and hung it from the Guttering. I've also banged a length of 15mm Copper Pipe into the Ground in front of the Window to use as an earth. I then lashed up a simple Crystal Set with an OA91 (CV7130), the British General Coil and an ancient Tuning Capacitor feeding a pair of 4,000R Headphones.

   

And it works

Well, a bit. I can get The Light Programme on Long Wave and something on Medium. It's very noisy - Acoustically - in here at the moment so I'll have to try again later when it's quieter. One interesting thing is that it works better with the 'Aperiodic Switch' in the AG position, so probably Lawrence is right and it means Aerial to Grid.

Alan

[pwdrive]

Early wireless...Spot on Alan.

I'm hoping to get back to doing some radio work at some point, had to flog all my kit to fund another property purchase, that's why I've been so tied up as it were of late with one thing and another, stress all the way, businesses don't seem to have much joined up thinking within their business structures these days, either that or I'm getting past it, pile of hassle with the banks etc.....Here's a rub....Banks offer a Faster Payments Service for largish amounts, supposed to be 2 hrs for transfer and no charge, indeed it is, however....So far as I know there is an industry standard maximum limit, well over 100k I think it is, but...different banks set different limits and those limits also vary between online account management, telephone banking or going into the branch in person.

I went to a bank the other day to do a Faster Payment Service transfer (which is free, eg: no charge)....."Sorry Mr, can't transfer that amount using the Faster Payment Service 'ere"....."So what's to do do then?"..."No worries we can do it by CHAPS"..."Is that free"...."No" In other words they purposely set the limit low to increase the number of chargeable CHAPS that they can rake in....

What a rip off, how much does it cost to press a button?...someone no doubt will give me a full explanation where BS baffles brains, but I still think it's a rip off, anyways I'm all calmed down now m'dears.

Lawrence.

[AlanBeckett]

Despite all the flack I'm actually impressed with Natwest's on-line Transfers. If the Recipient has an Account anywhere in the group it's instant. Others take a day or so. Charges? Not for me.

Alan

[pwdrive]

In my case it was a transfer to an external account and to a different bank, anyways all done now so I'm trying to chill out as it were...Such is life.

Lawrence.

[pwdrive]

I'm trying to put together some links from WW on working with ebonite....It might or might not happen...

Lawrence.

[pwdrive]

The British General coil shown in the link in post#117 looks like this one, circa 1928....Picture at bottom right of WW magazine page 402...Brief description starts at bottom left of WW magazine page 404 and continues at the top of the next column:

http://www.americanradiohistory.com/Arch...928-09.pdf

Lawrence.

[AlanBeckett]

Splendid! What an odd place to put the Text. It's just as well you told me where it was otherwise I'd have given up before Page 404.
'Mine', for want of a better description, doesn't have a 'Reversible Cover Plate' although the design is similar. I also fancy that mine covers a much grater range - the 'Short Wave' Windings really are short and fat

You'll have to slow down finding these interesting Articles as I'm running out of Disc space

Alan

[pwdrive]

This is a WW magazine review for a British General coil, I think it might be for the coil in post#128, it gives a bit more information.....not a lot, but it does confirm the 10 position switch plus tuning range etc.....WW magazine page 318 :

http://www.americanradiohistory.com/Arch...929-03.pdf

Alan, your coil might be a later one, I'm gradually trawling the WW magazines, it might show up with a bit of luck.

Lawrence.