[Heathkit] HW100/101 final tank coil

[Dick KF4NS]

Ok guys, I just discovered something I had not noticed in the 38 years 
I have been using my HW100, servicing and modifying it.

There has always been a problem with poor power output on the 10M 
band. I exhausted all the possible causes long ago and followed all 
the steps recommended. I even squeezed and expanded the add-on 10M 
tank coil that sets on top.  Nothing worked so I just gave up until 
now.

I was working on the tank load capacitor which had gotten very tight 
over the years. The shaft is fine and so is the bearing, just hard to 
turn so I cleaned the thing with some CRC and then lubed it the best I 
could, short of the dreaded removing of the cage and tuning capacitor, 
and it has loosened up considerably. Enough for that.

Then I happened to notice that the last 3 turns (part of the 10M band 
switching section) of the tank coil on my original coil, are wound at 
an angle slanted toward the rear of the rig, out of the coil form 
grooves  and unevenly spaced. I wonder if this is the root of my 10M 
tuning problem.

I would greatly appreciate it if someone who has a final tank coil 
that they can look at, would check and compare it with my 
observations. This fine radio works as great as the day I built it in 
1970 except for the low 10M output (about 50-60W).

73, Dick KF4NS
St Petersburg, FL 33714 USA
Keep The Glow!