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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only.

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Old 23rd Jun 2024, 9:33 am   #21
mole42uk
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Default Re: Pye 2010 Alignment?

I've also tried the loop at 770kHz and 1400kHz which gives a similarly successful result. Unfortunately the Marconi 2955 can't be set to provide a signal at 190kHz so I've not been able to check that low!
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Old 23rd Jun 2024, 9:55 am   #22
simpsons
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Default Re: Pye 2010 Alignment?

Hello Richard

An interesting exercise and given the unusual but specific frequencies specified, I wonder why they were chosen?

Converting the frequencies to Metres, unless there are markers on the dial are unseen by the camera, would make accurate front end alignment a little hit and miss.

On the subject of 190 kHz, 8kHz away is 198 Droitwich. Just saying!!

Chris
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Old 24th Jun 2024, 5:24 pm   #23
John10b
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Default Re: Pye 2010 Alignment?

I took a look through about ten different Radio Manufacturers service manuals dating from the late 30’s.
Not one made reference to “ search coil”, many, however, did refer to “Dummy Aerial “
John
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Old 24th Jun 2024, 5:32 pm   #24
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Default Re: Pye 2010 Alignment?

"Coupling coil" would have been a less confusing term.

David
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Old 24th Jun 2024, 9:10 pm   #25
mole42uk
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Default Re: Pye 2010 Alignment?

It's odd but the Pye service data suggest there is a datum on the dial which isn't on my set - but then who knows who's been at it? The reference is that with the tuning gang at 90 degrees open the pointer should be 1.45" from the datum, with the tuning gang at 165 degrees, the pointer should be at 2.67" from the datum.

On my set, the MW tuning appears quite accurate to the dial at 770 (390m) and 1400kHz (214m), but R4 isn't anywhere near 1500 on the LW scale....
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