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Old 21st Feb 2018, 6:22 pm   #11
David Simpson
Nonode
 
Join Date: Mar 2008
Location: Aberdeen, UK.
Posts: 2,838
Default Re: Tottenham Wireless Society

Bit more progress :- Thought I'd try & replicate one of the 1926 calibration graphs using coil A's original graph. The wee hand-held Watson Freq. Counter was tried first, but the digital display would just not lock on to a frequency long enough to read. Only managed to get one decent reading with the Condenser dial set at midway - (50), which came in at approx. 910KHz. (Close to the Lowe's result).
Then tried using my wee hand-held GDM - a Lowe FX-1 in wavemeter mode. More success, but that tiny edge meter was a sod to read. Anyway, the results more or less followed the old graph, but neither the Lowe's 'A' or 'B' plug-in coils gave any readable results at the higher freq. end. Coupling issues, I suspect.
The heffing buzzer didn't help, would run at a constant buzz for 3 or 4 seconds, then stutters for a bit. ( Bit like a WAAF I used to know).

Regards, David
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