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Re: [TenTec] Model 540/544 Question

To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] Model 540/544 Question
From: "Mike Hyder -N4NT-" <Mike_N4NT@charter.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Mon, 19 Nov 2012 20:55:13 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
But on reflection, with an SSB signal, you'd just hear one or the other sidebands but only the bottom 1.2 kHz of the audio spectrum would fall within the 2.4 kHz filter centered on 9.0 MHz. With CW, you'd hear tones on both sides of zero beat for twice the QRM.

----- Original Message ----- From: "Mike Hyder -N4NT-" <Mike_N4NT@charter.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Monday, November 19, 2012 10:15
Subject: Re: [TenTec] Model 540/544 Question


If the IF's center frequency is 9.0 MHz and your filter was centered at 9.0 MHz, then you would hear the bottom half of the audio from both sidebands at the same time, I'd think. If you wanted to work SSB, I'd think the 1.700 kHz offset would be about right.

Smarter minds than I always find fault with my logic so stand by.

73, Mike N4NT

----- Original Message ----- From: "N6QW" <n6qw@jessystems.com>
To: "TenTec Users" <tentec@contesting.com>
Sent: Sunday, November 18, 2012 11:44
Subject: [TenTec] Model 540/544 Question


What is the exact frequency of the 8 pole crystal filter used in these radios? While it is described as 9.0 MHz the service data seems to indicate the center frequency is around 9001.700 KHz.

Thanks
Pete N6QW

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