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[TenTec] Omni audio mod

To: tentec@contesting.com
Subject: [TenTec] Omni audio mod
From: "Rob Atkinson, K5UJ" <k5uj@hotmail.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Tue, 04 Jul 2006 02:19:07 +0000
List-post: <mailto:tentec@contesting.com>
If you go to the tentec list archive and enter "audio mod" you will get many many past posts on the inrad audio mod for the omni V and VI. go to http://lists.contesting.com and click on tentec and searchable archives

Depending on what is meant by "muffled" the mod may or may not help. for example, it may be said to be muffled because your carrier set points are wrong. Properly adjusting them may give you the clear audio you want. Or, it could be the microphone you are using.

The audio mod improves rx audio fidelity by widening the bandwidth from 2.4 khz to 2.8 khz and also by flattening the audio response curve across the rx passband.

There are two crystal IF filters involved: 6 and 9 MHz. The one that goes in the 9 MHz IF is also used to control the tx signal bandwidth, so if you use the 2.8 khz filter in that IF your tx bandwidth will be 2.8 KHz. Thanks for asking a question. I would like for more hams outside the U.S. to participate here. Perhaps list activity is low over on your side due to other priorities (W.C. hi hi). Here's an off topic question for the dx chasers--Is dx activity down due to the world cup?


rob / k5uj

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