[ICOM] New IC-7700 Dual Watch and CW pitch

David J. Ring, Jr. n1ea at arrl.net
Sat May 19 01:04:20 EDT 2007


Unfortunately, the IC-756PRO that I have had dual watch, but the audio 
goes to both ears - the audio amplifer is a mixed single channel (not 
stereo) signal.

Also I wish the audio control was adjustable in 10 Hz steps!  My ears 
love 780 Hz CW audio - not 750 or 800 - I'm always a wee bit off 
frequency when targeting my favorite pitch (perhaps the '756PRO goes 
750, 775, 800, 825 etc. but I'm not at the radio and I don't remember.

I spent many years with "Split Phones" one receiver in one ear, another 
in the other ear - and most often several receivers on different 
frequencies outside the earphones on loud speakers.  Military people 
will know the difference between a WATCH (one speaker or a headphone) 
and COVER (one frequency that was in a room of multiple radios) and a 
split-phone watch - which was nearly as good as a WATCH - except when 
you wer copying traffic!  But most of us didn't miss a call when copying 
traffic on the "other" ear - it might have taken us 20 minutes to 
respond if it was a routine call, but the SOS calls caused the traffic 
to be stopped, and both ears to go on to the SOS frequency!

Two audio signals is my way to do dual watch.
73

David N1EA

On 5/19/07, Anders Janis SM4RNA <sm4rna at telia.com> wrote:
 > A reflection on the DW discussions. It seems that it is common that 
when a
 > new radio is released, there is considered to always be a feature 
from the
 > next level radio missing. On the other hand I think I saw somwhere 
that the
 > 7700 is intended for the 765 and 775- owners. In that case there 
could be an
 > idea to include the features of those radios.
 >
 >
 >
 > Another interesting thing about DW is, that so many has bee complaining
 > about that ICOM's  DW that has one channel each for each ear. Of 
course the
 > demand top receiver preformace, but on the other hand they will 
accept a sub
 > receiver with performance and design similar to a entry level radio.
 >
 >
 >
 > On the picture of the 7700 I notice that there is a knob to adjust the
 > CW-pitch. That adjustment is sometime in a meny or on the front of the
 > radio. I choose the pitch to my personal liking. 440Hz fits my ears just
 > perfect. As I use the same ears all the time I see no reason to 
adjust the
 > pitch. Also it is good to know the exact pitch if one use external LF
 > filters or want to use the PC to analyse the signals as I easily can find
 > the correct QRG. I do not know if it is possible to see what pitch is 
chosen
 > on the display, but if not, it's not so good. Wonder if ICOM had some 
left
 > over space or if there is a idea behind putting the the pitch control 
on the
 > front?
 >
 >
 >
 > De Anders SM4RNA
 >
 > ----
 > Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
 > Icom Users Net: Sundays, 1700Z, 14.316 MHz
 > Icom FAQ: http://www.qsl.net/icom/
 >



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