No ! This is a completely different matter altogether. The 'near field' here relates to arrays and antennas much larger than a wavelength and refers to the point where the wavefront is planar, and tr
I think it would probably help - make the powers-that-be realise more than just one individual wants to play here. Question to Andy: Would it help or hinder your case if others were also to apply for
I did follow Lauries advice and deleted that file before reading the follow up messages about it being a hoax. Subsequent rebooting the computer gave no problem. That file was residing in the WINDOWS
Tnx for reports on this test signal, it does seem to penetrate. Interesting that both pictures of the received signal were decoded using lower sideband, and many others on this reflector in the past
PROBLEM ! I have a problem with the high power Tx which means the test message sent with this mode has to be restarted every so often. The DDS module integral to my Tx locks up sometimes when it is b
Just started the 7FSK test transmission at 400 W. Frequency is 137790.000 and tone spacing has been reduced to 0.15Hz at Laurie's suggestion. The transmission was started on the dot of 1500.00z so ch
OK, you're probably right, but as I've practically never operated CW in my life outside of microwaves, and only occasionally on SSB (then mostly just in the occasional VHF contest), the use of Q code
This is one of the arguments that have appeared on this reflector from time to time. Producing the tones in a coherent manner as you suggest would have athe advantages you mention for ultra narrow de
Update to previous message. The S/W worked first time I connected it to the DDS source, and there is now a 5 Watt test transmission going out on 137790.00 Hz which will continue the rest of this even
Yes, possibly. But reception of MSF here is marred by local interference which kills the ability to keep to much better than 10^-9 even with a very narrow PLL. Trying to use the 1PPS output, which re
Yes please. I haven't got round to using any of my '628s yet, but had heard a few vibes that things were not as they seem Andy 'JNT I will send any and all who ask a copy of this ASM file, which I ha
I think it's time for you to replace the batteries in your calculator. That's neat! But I make it 0.0083333 Hz resolution, I make it 0.00083333 Hz = 10.0000 mHz / 12. Both are submultiples of 1Hz...
Spot on Jim - It will be going again tonight - and this time I've put on a CW ident at 15 minute (+ the ID itself) intervals to keep some people happy :-) Andy G4JNT From M0BMU - I copied the G4JNT P
Change of plan - Tonight's transmission is 15 bits long, starting on the hour, so it repeats every 7.5 minutes with 30 second symbols. Again the starting bit of the sequence is a '0'. Frequency 13671
Sorry, its only the low power Tx. Various probelms with configuration / EMC stop me using the big jobbie for these tests - anyway, it wouldn't be fair would it, jamming all that wide band CW traffic
The GPS locked 30s element PSK transmission on 136718.75 was going all last night. Bill de Carle VE2IQ got part of the sequence and could definitely make out that there were two phase states, but unf
OOPS Sorry, Typing error The exact frequency is 136718.75 Hz for the low power BPSK test transmission (not .25 as stated earlier) The frequency is exactly equal to 7 / 256 * 5 MHz Andy G4JNT
I will be radiating a low power (about 4 watts RF, 1mW ERP) test transmission this evening (Saturday) using 30s BPSK with the transitions locked to GPS plus a few microseconds. The data sequence is 8
I've made a few mods to the GPS locked source after finally calculating the PLL parameters rather than relying on guesswork, sorry should read experimental determination, so the residual phase jitter
