[ARC5] 75-LF Converter Install and Test

[David Stinson]

I've cleaned-up the simple converter and mounted it in 
a cute little "Ranger" model 120 multiband light aircraft set.
http://home.netcom.com/~arc5/RNGR120.JPG

Here is the converter build:.  
http://home.netcom.com/~arc5/CNVTRII.JPG
The coils are mounted in opposite directions to minimize 
coupling.  The little cap is sticking off the board because 
there are two busses there to "tack in" different values 
of coupling cap between the two tuned circuits.  
I settled on 6 pFd, but wasn't much better than 12 pFd.
The Input and Output shielded leads are marked
with Morse "I" and "O" respectively.  

I don't have large heat shrink tubing at the moment, 
so carefully wrapped the circuit in some wide tape
until I can get some tubing from Tanners to encase the board.

Hooked it up, tuned it up and then tucked it under the chassis
in series with the antenna lead:
http://home.netcom.com/~arc5/CNVTRINSTL.JPG
Will look better when I get that heat shrink.
Yes- it needs some cleaning.  Later ;-).

The radio has no BFO;  it is designed for AM and that 
is my intended use.  Despite tuning "backwards" because
of the "high-end" mix crystal, I'm happy with it and 
it sounds excellent on 75 mtr AM signals.  
Sensitivity and image rejection are good.
Going to pair it with a "Ranger" aircraft transmitter.

Got to build a few more of these.... 
160-80-40 in front of my big Navy Longwave receivers, 
maybe....fun!

73 DE Dave AB5S