[Lowfer] down and out low down

Eric Smith [email protected]
Wed, 23 Apr 2003 20:08:37 -0500 (CDT)


While the audio final has been out in my GT-550, I've been able to use a 
crystal earphone :)

Now, RF is out.  I don't know if it is the front-end or the finals, but 
the S-meter doesn't even move when I tune around.  Dead as a doornail.

There are about two $500 expenditures I need to make before I'd feel very 
good about spending $500 on a radio.

In about 15 minutes I can build a radio that will pick up the AM broadcast 
band with an oatbox, a length of wire, a resistor, a 1N34, and my trusty 
crystal earphone.  Of course, those stations are 50,000 watts :)

But it looks like I could build a more complex circuit (with some RF 
amplification and better selectivity) that would work BELOW 500 kc, 
without going to the complexity of a synthesized tuner.

I have plenty of 365pf air variables :) and thousands of feet of telephone 
wire.

Do any of you know where I might find such a circuit?  Point me to a 
schematic, and I'll build it!

Thank you,
Eric, KD5UWL, hurting BAD in EM25