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 Philco 46-250

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slammed87d21

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PostSubject: Philco 46-250   Thu Oct 21, 2010 3:41 pm

Just had it playing here on the bench as I donwnload another OS, and I noticed something. When I place my finger on the antenna through a hole on the back, the signal increases. Ok, I know that my finger on the antenna increases capacitance, so could I not add a capacitor between the tuning cap and the antenna to do the same, but permanently?

Just curious...
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Aaron

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PostSubject: Re: Philco 46-250   Thu Oct 21, 2010 4:39 pm

I thought that, by touching the antenna, your body is inductively coupling with the set's existing antenna to create a larger, better antenna.

I'd love to hear what the experts have to say about this. Smile

Aaron
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Reece

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PostSubject: Re: Philco 46-250   Thu Oct 21, 2010 5:57 pm

Aaron is right. It's common to have the signal increase when you put anything conductive near a loop antenna, a length of wire the end of which is formed into a loop, or your hand, part of your very conductive self. You're an antenna. If the radio's been aligned and the signal isn't enough on weak stations, turning the radio about on the table will swing the loop antenna to be able to find the strongest signal. If that's not enough, often there's a connection for an external wire. Ten or twenty feet can make a big difference. Some radios may work better with the end of that length of wire formed into a two turn loop and taped to the back of the rear cover/loop antenna with no direct connection.
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Aaron

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PostSubject: Re: Philco 46-250   Thu Oct 21, 2010 6:34 pm

Reece wrote:
If that's not enough, often there's a connection for an external wire. Ten or twenty feet can make a big difference.

If I want to attach 10 or 20 feet of wire, how should the wire be arranged? Does it need to be straight? Can it be wrapped up into a loop (so it takes up less space)? Can I just attach a big spool of wire? Smile

Aaron
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slammed87d21

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PostSubject: Re: Philco 46-250   Thu Oct 21, 2010 7:58 pm

Aaron, there's not really any special way to have a long wire of that length. When I had my Atwater Kent model 84 in my bedroom, I just draped 10 foot or so if wire in a "J" shape and used a thumb tack to hold the end up. Across the floor worked well too.
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