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Author Topic: HF9V HELP!!  (Read 962 times)
AC2Q
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Posts: 348




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« on: July 22, 2012, 05:32:34 AM »

I was recently given an HF9V that the previous owner stated he could never get to tune properly.

It APPEARS he had the 80 and 40 m coils swapped, but I was hoping someone there could tell me the ACTUAL TURNS of each  of the coils?

Any Help Appreciated.

Mike AC2Q
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AC2Q
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Posts: 348




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« Reply #1 on: July 22, 2012, 06:04:32 AM »

.
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K5LXP
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« Reply #2 on: July 22, 2012, 07:33:52 AM »

You wouldn't need to count the turns, the 80M coil is 2x as big as the 40M coil.  You can download the doc's at the Bencher site.


Mark K5LXP
Albuquerque, NM
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K5KNE
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« Reply #3 on: July 22, 2012, 01:39:37 PM »

Good advice - the 80 meter trap is twice as long as the 40 meter trap usually.

The number of turns varies because it is dependent on the diameter of the coils, spacing of the turns and the size of the capicator making it resonant on a given band.  If both traps are made by the same company - the shorter one is for 40M and the long one is for 80M. The 40 meter trap is placed closest to the feedpoint at about 32 feet. The 80M trap is placed farther away from the feedpoint. Adding some more wire the antenna can work on 80M, 40M, and 160M.

Walter K5KNE

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K3VAT
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« Reply #4 on: July 22, 2012, 01:55:07 PM »

...  The 40 meter trap is placed closest to the feedpoint at about 32 feet. Walter K5KNE

Not sure what Butternut HF9V that you are referring to in the post as the entire antenna is only 26' tall.


Adding some more wire the antenna can work on 80M, 40M, and 160M.

Walter, believe that you are thinking about another antenna.  One doesn't have to add any wire to operate 40M and 80M with the HF9V.

Rich, K3VAT
« Last Edit: July 22, 2012, 01:58:38 PM by K3VAT » Logged
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