[TenTec] New roofing filter in Omni VI- Opt. 1

[Clark Savage Turner]

As I grow older my ability to differentiate signal from noise is 
changing in different frequency bands.  Though it takes more 
concentration, I find now (I turned 50 last year) that I often listen 
below 500 Hz whenever I can.  I can use the 600 Hz offset OK, but it 
doesn't work well for me if the signal is weak and next to the noise.

In fact, I find that during long CW QSO's, I like to have the RIT 
engaged so that I can vary the tone I listen to, it seems to keep my 
concentration up.  I don't go above 600 Hz very much, just occasionally 
for a change.  It is just plain hard on my ears :-)

Clark
WA3JPG

On Jan 12, 2005, at 8:23 AM, John L Merrill wrote:

> Bill:
> I wonder how many do use an offset that low?
>
> John N1JM
>
> -----Original Message-----
> From: tentec-bounces at contesting.com
> [mailto:tentec-bounces at contesting.com]On Behalf Of Bill Tippett
> Sent: Wednesday, January 12, 2005 8:28 AM
> To: tentec at contesting.com
> Subject: Re: [TenTec] New roofing filter in Omni VI- Opt. 1
>
>
> NI0C wrote:
>
>> The roofing filter is designed for a CW offset of 700
> Hz, and works fine with the slightly different offset (600 Hz) of the 
> 753.
> I suspect that Inrad chose 700 Hz as a compromise offset so that it 
> would
> work equally well with their 600 Hz offset filter and the standard Ten 
> Tec
> 750 Hz offset.
>
>          Wow!  Is that right?  I NEVER listen with CW pitch higher
> than 450 Hz and normally use 270 Hz for really weak signals.  The
> ability to set Orion to a pitch below 300 Hz is one of its major
> benefits IMHO.