Hi Brad,
I too had that same buzzing problem after I replaced a quad antenna with
a yagi. (What the change had to do with the antenna swap still baffles
me.)
Anyway, I solved the buzz by isolating ("floating") the ground connection
for the BRAKE
power in the TailTwister control box. (Consult your manual that has the
schematic.)
Buzz fixed!...and it's a simple fix to try...might work for you as well.
73,
Charlie, N0TT
On Fri, 8 Feb 2019 15:53:29 +0000 Brad Anbro <n9en@live.com> writes:
> ?Hello all,
>
>
> I have a problem which has me completely baffled. I am attempting to
> use
>
> a Bencher "XZ-2" audio filter, in conjunction with my early-model
> Yaesu
>
> FT-1000MP. When I move my HF antennas with the control box that
> powers
>
> a Tailtwister rotator, I get a very loud 60-Hz hum in my headphones.
> Even
>
> when I only depress the brake release lever on the control box, it
> still
>
> produces a hum.
>
>
> So far, I have tried electrically isolating the grounds for both the
> rotator
>
> control box and the Astron DC power supply, which supplies DC power
> to
>
> the audio filter (and other devices). None of this has helped.
>
>
> I have found that if I plug my headphones directly into the
> headphone jack
>
> of the HF rig, there is no hum whatsoever. I am guessing that the 60
> Hz
>
> AC is coming into the audio filter through the DC power supply cord.
> If
>
> this is actually the case, I don't know what to do about it to solve
> the
>
> problem.
>
>
> Any ideas or help with my problem would be most welcome. Thank you!
>
>
> 73,
>
> Brad Anbro, N9EN
>
> Bluff City, Tennessee
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|