[Premium-Rx] Ten-Tec RX-340 - Amateur Use

[w3jn]

First, as I mentioned, making a narrow filter at high frequencies is not 
trivial.  You think paying $100 for a typical 9 MHz xtal filter is bad... 
try and price a 40.455 3 KHz xtal filter!

And I can think of many receivers costing much more than the TenTec that 
don't have them either.

73 John

----- Original Message ----- 
From: "Walter (Volodya) Salmaniw" <salmaniw at shaw.ca>
To: <premium-rx at ml.skirrow.org>
Sent: Tuesday, February 08, 2005 12:23 PM
Subject: Re: [Premium-Rx] Ten-Tec RX-340 - Amateur Use


> At 08:57 AM 2/8/2005, w3jn wrote:
>>Therefore, roofing filters of 10, 6, 3, or even 1 KHz switchable are 
>>highly desireable, but not necessarily easy to accomplish at the low VHF 
>>region with crystals.
>
> Tell me then, why don't all high end HF rigs have this capability?  The 
> Ten Tec 340 roofing filter mod looked pretty straight forward and 
> inexpensive (using a KIWA 4 kc filter).  Others have done this mod and are 
> happy, but I wasn't due to the loss of fidelity.  Guy Atkins and I had 
> problems when we tried added a switch to the mod.  Somewhere along the 
> line we lost a lot of signal strength, which was not the case if the 
> filter was wired in permanently.  I've been wondering about this problem 
> for quite a while.  I don't understand why a $4k receiver (ie the 340) 
> wouldn't have such a capability.  I re-iterate again that the Ten Tec is a 
> bit of a dog on MW in it's unaltered state.......Walt.
>
>
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