[TenTec] Omni V vs. Headphones

[Mike Hyder -N4NT-]

Yours is a better plan but mine is cheaper (if it works).

Mike

----- Original Message -----
From: "Ham" <KD5NWA@mbayona.com>
To: "Mike Hyder -N4NT-" <N4NT@chartertn.net>
Sent: Monday, March 25, 2002 10:18 AM
Subject: Re: [TenTec] Omni V vs. Headphones


| Radio Shack have small impedance matching transformers, I recall a one
that
| would transform 500 Ohms to 8 Ohms, that unit will reduce the loading
on the
| Headset amplifier and stop the rumbling. If they don't have it a 5:1
small
| audio transformer will transform 200 Ohms into 8 Ohms, the 5 side goes
to
| the jack on the Radio, the 1 side goes to the headphones.
|
| Cecil
| KD5NWA
| `
| ----- Original Message -----
| From: "Mike Hyder -N4NT-" <N4NT@chartertn.net>
| To: <tentec@contesting.com>
| Sent: Monday, March 25, 2002 8:39 AM
| Subject: Re: [TenTec] Omni V vs. Headphones
|
|
| > Put a 192 ohm resistor in series with your headphones?
| >
| > Mike N4NT
| >
| > ----- 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