[Antennas] Bencher model hf6x vertical

[K7lay at aol.com]

Hi All,
 
I recently purchased from an estate sale a Bencher Model Hf6x  vertical which 
has the 12/17 mods along with the cpk counterpoise kit  installed.
 
I plan to ground mount this antenna using radials instead of  the cpk kit.
 

The coil part Q (base matching/grounding coil is missing
The cpk kit used 35 feet of rg-11 75 ohm coax as a matching line.  The  
ground mounted vertical uses a "short" matching line but the parts list doesn't  
show its length.  Do any of you know the length of this short  version?  I can 
easily make one out of the 35 ft length used with the  cpk.
 
Finally do any of you know the base/matching, grounding coil dimensions  i.e. 
coil diameter, number of turns, wire type/gauge etc for the missing  coil?
 
Thanks in advance.
 
Bob K7lay  email is k7lay at aol.com