Hell many of the CW ops can't zero beat a signal and get onto frequency when answering my CW what makes us think that SSB ops are going to be any better about it?
On Thu, 2008-08-14 at 16:41 -0700, O. Johns wrote: > Folks, > > I read the web pages about ESSB, after seeing on the reflector that > the K3 now supports it. It struck me that even ESSB doesn't solve one > big issue with voice transmission: PITCH. Tuning the SSB receiver > changes the overall pitch of the received voice. Unless you have met > the sending ham or at least talked to him/her on the phone (or on > AM!!), you have no real idea how high- or low-pitched the voice really > is. One can only guess, and get a sort of feel for what a reasonable > tuning is. > > One way to solve this may seem a joke, but it isn't. Everyone should > buy a little 440 Hz pitch pipe, the kind used to tune musical > instruments. Then, say, the net control could blow his pitch pipe at > the start of the net and all the listeners could blow their little > pitch pipes while listening to net control. They would all then > adjust their receiver tunings until the pitches matched. Like a > shortwave orchestra tuning up. (Of course, this might violate the FCC > rule against music on ham radio, but maybe not if the pitch pipe was > near a pure sine wave. Then the signal transmitted by net control > would be just an ordinary CW signal, but at 440 Hz from the net > control's suppressed carrier.) > > A refinement would be to build a pure 440 Hz tone generator into the > microphone preamps of radios. Net control pushes a button while > transmitting and it goes out over the air. The net members push > another button while receiving to produce a 440 Hz tone in their > speakers along with the received signal from net control. Then the > receiving operators adjust their receiver tuning until the pitches > coincide. For the tone challenged among us, the receiver tuning could > even be automated, much like the K3 already does for sidetone on CW. > > This scheme came to me when I was adjusting the audio parameters on my > K2. I had the K2 running into a dummy load, and was listening to it > on headphones plugged into a TenTec RX320D across the room. Since the > K2 was on a dummy load, I tried whistling and was surprised and > pleased to find that the PITCH of my whistle didn't match the one I > was hearing on the phones. But I could adjust the RX320D tuning until > they did match. Guarantee of zero beat and realistic pitch in voice > reception. > > Doesn't seem that this would be too hard to do. Maybe the K3 could > even do it in firmware? > > > 73, > > Oliver Johns W6ODJ > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
