[aprssig] Re Net28
g0jxn.jim at ntlworld.com
Sun Jun 13 09:29:13 CDT 2010
Stephen, I am of course aware that USB is used for phone above 10MHz but was
under the impression, perhaps wrongly, that data was specified as a LSB
frequency. But no problem, the 300bd KAM tones are 1,600 and 1,800 Hz, so
centre frequency 1,700 Hz. For USB move the dial setting down twice that
28.140 MHz - 3,400 Hz = 28.136,600 MHz.
For PK-232 (AGWPE, the free one) subtract 510 Hz, i.e. 28.136,090 MHz.
> Stephen, WA8LMF Wrote:-
> I think you should consider expressing the frequency in question in
> terms of it's USB equivalent.
> * LSB operation is almost unheard of on 10 meters (at least in North
> * All radios default to USB mode on this band. Many require multiple
> button pushes or menu levels to switch to the non-default LSB.
> * Nearly all commercial, marine, and military-surplus SSB radios
> (that hams sometimes acquire second hand) ONLY operate on USB.
> Or better yet, specify the actual RF mark/space freqs so that users with
> devices that have odd tone pairs such as the TigerTronics TigerTrack
> (1100/1300 Hz audio tones), or fully variable tones (such as the MixW
> soft modem on packet), can calculate what RF freq [USB or LSB] to use.
> Note further that the paid-for "Pro" version of AGWpe can use standard
> KAM tones (1600/1800).
> Stephen H. Smith wa8lmf (at) aol.com
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