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Re: [TenTec] Darth Vader sounds

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Darth Vader sounds
From: Kevin Purcell <kevinpurcell@pobox.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Fri, 27 Apr 2007 13:29:44 -0700
List-post: <mailto:tentec@contesting.com>
This is a very good point. I think it's mentioned in the manual too!

On my Argosy in a high RF environment (multiple TV TXs within 1 mile) you can hear the 60Hz frame buzz with volume just off zero when wearing headphones but it drops off rapidly when you turn up the volume (and the real signal takes over).

Are there any pre-made adaptors out there? Seems like a mono to stereo adaptor with a built in resistor would be one less bit to loose.

On Apr 27, 2007, at 12:21 PM, wa3fiy@radioadv.com wrote:

Probably a case of WAY too much headphone sensitivity.  Many audio
problems can be minimized by adjusting headphone sensitivity such that you
have comfortable audio level in the 'phones with the volume control at
around 12:00 position.  Low impedance phones driven by the low
impedance unattenuated output of the Argosy usually require volume
settings just a little higher than full off.  Not good!

This is not unique to the Argosy by the way. Any audio device that delivers
low impedance unattenuated output from a power stage to low impedance
'phones will have a poor signal to noise ratio.

You can reduce headphone sensitivity by putting a 220 ohm to 470 ohm
resistor in series with your phones. Use a 1/4 watt resistor and solder inside
the phone plug.

73,

-Lee-

WA3FIY


On 27 Apr 2007 at 12:20, larry sorrow wrote:

No response from my previous post. Maybe it got caught up in the mix. I own an Argosy II. When I xmit in SSB, I hear myself in the headphones (Kenwood HS-5) I hear myself in the headphones and it sounds like Darth Vader from Star Wars. Anyone with any ideas of what's causing this?
73
Larry KE4ITN



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Kevin Purcell
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