[R-390] Xtal Set/Antenna Follow-Up

[Michael Murphy]

Harry,

Take the flagpole and drive it into the ground until about 6 inches is
exposed. This will be our ground. Next...

Mike WB2UID

----- Original Message -----
From: "Harry Joel" <hcjoel at direcpc.com>
To: <r-390 at mailman.qth.net>
Sent: Wednesday, July 21, 2004 2:11 PM
Subject: [R-390] Xtal Set/Antenna Follow-Up


> This is an follow-up to my July 10 story about my longwave antenna
installation for my crystal set.
> The designers of quality crystal sets, without the benefit of modern
circuit theories, applied features to get the most 'output' to the
headphones with no amplification. To mind comes the use of 'honey-comb'
wound tuning coils (often the plug-in type). After installing my flagpole
long wire, I realized that a good ground connection of the antenna tuned
circuit was mandatory. But alas, my beside set was too far from any metal
water pipe. AC outlets were the two wire type with no ground. In an
experimenters magazine I came across the expression 'counter point'  to
replace a ground connection. On a hunch I made a good connection to the
steel spring frame under the mattress and it worked like a champ. My theory
is not up to snuff on this. It seems that the counter-point was the third
element in the series connection of longwire-tuned circuit-counterpoise. Any
ideas from the gurus?
>
> My music teacher (organist at a church two blocks from his apartment) used
a no longer used private phone line to the church office as a super-duper
long wire. He picked up a really strong signal. Glued a large seashell to
this earphone and the volume was good enough for listening across the room!
Being a radio afficionado he also had build a superheterdyne receiver.
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