KC9KEP - A work in progress

 

 

  Homebrew Radio Projects - ARRL 1941 Superhet

click for larger images
ARRL original
Big Nick version
ARRL original
Big Nick version
ARRL original
Big Nick version
ARRL original
Big Nick version
 

Hello all!

I'm not sure what has compelled my addiction of building these 1940's ARRL radios, but I'm hooked!

This model is the unit that Lindsay had used as a model to fashion his "Impoverished Radio Experimenter" volume that featured a homebrewed superhet receiver, complete with homebrew I.F. transformers.

Well, I had to build the "original" to see what how it handled.

What a totally cool design!  The "sophistication" of this unit brings it even closer to handling like a real store-bought unit.

I had to come up with my own BFO coil.  And, I could not locate the 1600 kHz I.F. permeability tuned transformers, but was lucky enough to find some nice high-quality Millen capacitive-tuned ones.

To replicate the original ARRL layout, I blew-up the top-view from the ARRL handbook, and taped it to my chassis to transfer component location.

I do not know why my front panel didn't have the enough "room" for the various band designations.

Their panel was 6" X 10".  I've increased my height to 7" X 10".  The chassis is the same dimension.  Maybe the ARRL original had smaller knobs?

This unit really brings back cherished memories of what electronics first was to me.  Only, this time, I get to understand it, conquer it, and afford it, let alone, build it from scratch!