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Antenna for Philco 39-40
#2

Well there are two answer to your question. The simple answer is yes there is. The longest highest free from near by buildings and power lines.
The more accurate answer is yes it should be resonant to the frequency that you are tuned to. What you will need to do is convert your frequency from kc or mc to meters. The formula is wavelength in meters is equal to 300,000 over frequency in kc or Wavelength in meters in equal to 300 over frequency in mc.
If you do the math an antenna resonant at the low end of the bc band say 550kc is about 500 meters long. That's pretty long! when you get up to say 6mc it's about 50 meters long.
I took a glance at the diagram of your set. It's a nice one with a rf amp and a real phase inverter something not seen on many Philco's of that vintage. Have you got it working? and working well?
Terry

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry


Messages In This Thread
Antenna for Philco 39-40 - by Sourbone - 06-08-2010, 09:55 AM
Re: Antenna for Philco 39-40 - by 7estatdef - 06-08-2010, 09:23 PM
Re: Antenna for Philco 39-40 - by mgutierres - 06-09-2010, 02:47 PM
Re: Antenna for Philco 39-40 - by Ron Ramirez - 06-10-2010, 08:21 AM
Re: Antenna for Philco 39-40 - by denver - 06-10-2010, 02:11 PM
Re: Antenna for Philco 39-40 - by exray - 06-10-2010, 07:19 PM



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