[TenTec] Inrad Mods/ Reply to Ken Brown

[Ken Brown]

Hi Al and all,

The point I was trying to make is that in an Omni VI your SSB transmit 
bandwidth is limited only by the "roofing" filter and the Narrow 9 MHz 
IF filter is cascaded with it for receiving ONLY. If someone decides to 
widen their TX bandwidth by changing the standard Ten-Tec 2.4 kHz filter 
for a wider one, they should be aware of the fact that their SSB TX 
bandwidth will always be the as wide as that filter regardless of which 
narrow filter they have selected (or not) in either the 9 MHz IF or the 
6.3 MHz IF. Is the difference between 2.4 kHz and 2.8 kHz a big deal? 
That depends on band conditions and what kind of operation you are 
doing. Once the wider filter is installed, you're stuck with it for your 
transmit bandwidth, on that radio, until you change it back. That might 
be okay for some people. Maybe they only operate when the bands are 
fairly lightly loaded, or maybe they use another radio for contest 
operation or DXing, or maybe they don't care if they unnecessarily QRM 
others. Best that they understand what they are doing though. I also 
asked whether the same is true of the OMNI VI +, that only the one 
filter is ever in the transmit signal path. Never got an answer on that. 
I expect that is the case. Newer radios with transmit bandwidth 
controls? Yes that is great, especially if the operators understand how 
to use them. Is wider more natural TX bandwidth nice, and more natural 
sounding? Yes absolutely, I like it too. Should we use our radios that 
way in all conditions? Absolutely not! And that is why I don't think it 
is generally a good idea to make a radio work that way all the time.

DE N6KB