The "Sky King" Solid State Regen Radio

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At this time I decided to create the permanent front panel. It was a bit premature but I was impatient.
 
Cardboard and foil replaced with plywood and copper clad plastic. I would end up with an extra hole when the set was complete.

Another test, again with the Peebles antenna tuner.

Testing the RF amp. The switch in the middle of the panel was a "Broad/Narrow" tuning switch.
I couldn't get it to work right, and since the set has a fine tuning control I removed it.
 
The RF coil was ineffective so a new RF coil was made to go inside the main coil. It still didn't work very well. While deciding
whether or not to add more turns, I tried connecting the RF amp directly to the antenna tune control  and it worked very well that way.

The finished radio should have looked something like this, but after connecting the antenna tuner I found
that the coil and its switch weren't even needed. The tuner worked better with just the variable capacitor.

The mounts for the coil became binding posts.
The hole for the coil tap switch was filled in...
.... with a variable capacitor to the antenna.
This is actually in the schematic but I had left it out.

 
It's starting to look like a radio. Knobs are getting hard to find. These came from Mike Peebles.
 
The tickler coil had too many windings. I removed them one at a time, but took off one too many. A new tickler was wound
using red colored wire to make it "hotter". The main coil remained green because radio waves travel better through green wire.
 
After using the radio for a week or so, the silver mica capacitors I ordered for the grid leak came in the mail. (Maybe we should call it a "gate leak" since there's no grid in a transistor.) I cut out the grid leak and tried various values by clamping the parts together with small alligator clips. I settled on a 100pF silver mica and a 2.2 megohm resistor. I THINK it worked better.
 
Here is how it looked from the back  in March of 2015. Almost done!
Adding and removing parts once they are soldered in starts to make things look messy, but one cool trick I found was that because there are two unused taps on the "band switch", you can wind a coil, connect it to an unused tap, and drop it inside the main coil. The tickler coil doesn't care, as long as the coil winding is in the right direction.


By March 2015 it was time to give the radio a name, but not just any name. it had to be a COOL name like short wave radios had in the 1950s and 1960s. For example:

Eico - Space Ranger
Hallicrafters  -  Skybuddy, Sky Champion and Super Skyrider
Lafayette - Explore-air
Knight - Space Spanner and Ocean Hopper
Radio Shack - Globe Patrol
Weskit - Space Rambler

In keeping with the spirit of these names, the name of this radio would be the Sky King, Model # N5348A

Model number N5348A.

 
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