[TenTec] Have questions

[jamesmozzillo at aol.com]

Hi John (KB2HUK):
 
I do not agree with putting in an Inrad filter at the 1.8 position. I am assuming that the 1.8 position is the 1st intermediate frequency of the receiver. The reality is it is a trade off. By not limiting the bandwidth near the input of the radio, you are allowing your front end to be overloaded when a high power signal is nearby. To compensate for this, you can use a broad band roofing filter say for 6 or 8 KHz which is plenty wide and would minimally reduce sensitivity if at all. But if the ham "down the road" turns on his high power linear 300 Hz away from the signal you are working on CW a narrow roofing filter will prevent the front end of your receiver from overloading. Yes you have reduced your sensitivity a bit but you can probably dig the signal out just fine. If you put the filter in the next stage of the reciever, you will overload your fron end and your AGC will be overloaded and reduce your sensitivity anyway.
 
The engineers at TenTec have thought of this and designed the Orion accordingly. Now Icom and Yaesu have announced that they have put in roofing filters in the high priced rigs. Why? Think about this please.
 
Sincerely,
 
Jim
NC9J 
 
 
-----Original Message-----
From: brazos at rochester.rr.com
To: tentec at contesting.com
Sent: Sun, 22 Oct 2006 4:51 PM
Subject: [TenTec] Have questions


Hello , I am currently saving for a nice Orion 1 .  I am tiring to get a handle 
on what to look for on the used market.  I have heard that a radio with all the  
optional roofing filters installed actually desensitizes the radio and may not 
be any kind of an advantage , and that the slick operator puts in a Inrad filter 
at the 1.8 position and this allows closer in sensitivity ?  can you advise?  Am 
I close ?   soooooooo confused !   thanks  John kb2huk  
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