[TowerTalk] HF6V choke coil

[Stephen Lee]

  Greetings to all,

For the Butternut HF coil, check DX Engineering's Butternut parts web 
page.  There's a good picture of the coil.  On that picture I count 17 
coil turns along the top.  I'm holding an older Butternut coil in my 
hand here in the identical position and count 18 turns across the top of 
this coil. On mine, there are no crimped on wire terminals. The coil 
wire is simply stripped and looped at each end with both loops being 
solder coated.

Holding the coil just like in the web picture and slipping a tape 
measure vertically in amongst the coils I measure exactly 1-1/2 inches 
across the outside to outside diameter of the coils. The coil wire 
itself has a transparent red coating just as the picture indicates. The 
overall diameter of the thinly insulated copper wire is 85 thousandths 
of an inch and that includes the insulation.

Coil length is variable. According to the manual, one simply spreads it 
apart to effect a very narrow window of bandwidth within the 75 to 80 
meter band. That coil should only effect the 75/80 meter band so it is 
possible to dial-in the antenna for use with the other bands. I've 
operated my Butternut without the coil; simply avoid transmitting on 
75/80 meters.

The Butternut HF series of verticals shipped with a piece of 75 ohm coax 
to be used in series with the feedline. Was that included with your 
Butternut vertical, and if so, could you send the end-to-end measurement 
of that piece of coax please?
Enjoy!    Stephen Lee    N7RV

On 9/13/2016 7:09 AM, Frank Davis wrote:
> I have an HF6V that is missing the coil at the base…the one that bypasses the base to ground.   Can some one send me the dimensions ( length and diameter)  and number of turns in that coil so I can make one.     Thanks     Frank       VO1HP