As it turns out, the source I found on the internet for “Dit duration” was inaccurate so my quick and dirty calculations were out by a factor of ten.
What I know know is the correct formula for calculating a “Dit duration” is 1200/WPM (this is just the on-time, not including the trailing inter-element pause). So at 20 WPM the on-time for a DIT is 60ms not 6 ms as I had originally thought. At 30WPM it is 40ms. Usually I send in about the range of 20 to 25 so I am looking at about 50ms for a DIT. If I truncate the leading DIT by 10ms because of the 10ms PTT Out Delay I have set in PowerSDR, I suspect that it will still sound like a DIT as it is only being shortened by 1/5. I am now thinking that this is likely a non-issue. Michael VE3WMB On Jan 22, 2014, at 7:58 PM, Michael Babineau <mbabin...@magma.ca> wrote: > I just recently acquired a Tokyo Hy-Power HL45B for use with my Flex-1500. I > also have an interface cable to > allow me to key the amp from the Flexwire I/O connector on the rear of the > rig. > > From what I have read, Tokyo Hy-Power recommends using a TX Out Delay of 10MS > after keying the Amplifier > and before applying RF. > > https://groups.yahoo.com/neo/groups/FlexRadio/conversations/messages/10435 > > This shouldn’t be an issue on SSB but if I am operating CW, according to my > rough calculations the on-time for a DIT will be <10ms in > duration for code speeds in the range of 20 to 30WPM so I think that this > means that I will be losing the first DIT on any > CW transmission. > > Has anyone noticed this issue using the HL45B with a Flex-1500 on CW ? > > I think that my WINkeyer USB may be able to compensate for this but a good > question to ask is does the Flex-1500 internal keyer take this > into account when Antenna>FlexWire PTT Out Enabled [ON], Delay [10ms] is > set, and perhaps compensate for it .. or am I asking for too much ? > > Michael VE3WMB _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
