[HBR] Thoughts on the Jackson Drive

[LeeCraner at aol.com]

Hello fellow list members:
 
The Jackson Bros. dial cited incorporates the somewhat famous Jackson dual  
6:1/36:1 ball drive (used in many commercial ham rigs of the 70's) and a 
dial  reminiscent of the old National dials originally used by Ted Crosby on 
his  HBR's.  The drive itself (w/o the dial) is available, new, through 
Surplus  Sales of Nebraska.
 
This is the drive that I used on my HBR-16, though I combined it with the  
National ICN lighted dial (replacing the National Velvet Vernier drive).   
This is a great drive, though there is a lack of torque capability in the 
36:1  range.  This means that you need to make sure that your tuning cap is  
perfectly square to the drive and is well lubricated.  If you can  accomplish 
this, this Jackson drive is THE drive to use, in my opinion.
 
If anyone would like to see how I mounted the Jackson Drive in the National 
 ICN, drop me your email address and I'll send you some pictures.
 
As to the placement of the drive, Ted always used the left side, rather  
than center, for mechanical rigidity, and thus better frequency  stability.  
The C in HBR-13C indicated center placement of the dial, but  the HBR-13C was 
not Ted's construction.
 
73
Lee WB6SSW