How to Figure out your transmit range

They used VERY LOW frequencies in fact much WW2 surplus was in the 100 - 1500 KHZ range. Your down flyer transmitters ran on 500KHZ.
The BC-348 receivers carried in bombers worked below 18MHZ and the navy ship board radios 2 common ones were the RBL ( 50 - 1500 khz ) and RBM ( 1500 - 18000 khz )

You can see in these photos Center in 1968 a BC-348 and in 1969 top left a RBM I used them as IF's on 14 mhz for my 2 meter stations.

LOW frequencies over water and VERY VERY low frequencies ( under 100khz ) under water is how you talk to a sub .......

 

Are you a " lowfer " Bruce????

Is there skip as in skywave that low in the spectrum? I had always assumed it was all surfacewave and directwave.:smt102:smt102

 

YES I have played on 170 khz but right now don't have the station working. What I found was VERY LONG GROUND WAVE.

 

The 1400 foot wip on your 18 wheeler

No kidding a 1/4 wave antenna on 170 khz is almost 1/4 MILE tall.
Noise is VERY high but with any luck you can work very long distances.
There are few active stations however on the new 500KHZ experimental band the ARRL/FCC is working on that band as a ( MAYBE ) new ham band.

160 to 109 KHZ does not require a license.

 

Strict antenna regulations

anyone know if amateurs in the UK still have 73 KHz for amateur use?

 

(160 to 109 KHZ does not require a license.)

OOPS THAT SHOULD BE 160 to 190 KHZ

 

And not good for gas milage either

 

102" Geeeez That must look strange..