Mark,
Just add 100 ohm resistors in series with the headphones.
You can do this right in the headphone jack of the headphones.
Carl Moreschi N4PY
----- Original Message -----
From: "Mark Erbaugh" <mark@microenh.com>
To: <tentec@contesting.com>
Sent: Monday, March 25, 2002 9:14 AM
Subject: [TenTec] Omni V vs. Headphones
> Recently, I connected my Kenwood HS-5 headphones to my Omni V. There is a
> noticeable rumble in the audio. The level of this rumble seems to be
> independent of the AF Gain setting. In fact, with the AF gain at minimum,
> the rumble is still present. If I partially remove the headphone plug, so
> that the speaker is again active, but there is still audio in the
> headphones, the rumble completely disappears.
>
> I tried a Heil ProSet Plus headset. It does not exhibit the rumble, even
> when the speaker is muted.
>
> I suspect that this is an impedance issue. The impedance of the Kenwood
> headset is 8 ohms. The Heil is 200 ohms.
>
> Is there a simple fix that could be made into an adapter cable that would
> allow the Kenwood headset to be used?
>
> 73,
> Mark
>
>
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