........................................................................... ..... Ideally these transmissions should be in the 'test' area of the agreed band plan below 136.0. Tut tut Walter, you are
Some of you may recall that I promised to put a digest of past technical stuff from the LF reflector before it evaporated through passage of time. This went on hold during the production of the Amate
Hi Martin In Peter Dodd's book LF experiments page 55 a drawing is shown of a loading coil arrangment. The the coil inductance is adjusted by shorting turns on the coil. Is this right? Yes. If you lo
Hi John Of course, there's a lot to be gained by narrowing the BW, so I ran ARGO at 60 sec/dot, and had to crank in another 13 dB to kill HBG. There's a considerable time lag in making such measureme
Hello Dick, I used this method and two other ones to measure the Q of my loading coil. The coil can be seen on page 62 and on the cover of the LF Handbook (the caption of Fig. 4.17 at page 62 describ
Hi Dexter & Bob I lost all signal from the 73.3 kHz RTTY station by 0100 UT last evening. QRN was very high so the signal could have been just below my noise level. Relative signal strength logged ar
Well, I guess it had to end. Absolutely nothing was visible from Laurie or Jim on 72 kHz last night. I kept the screen on 120 sec dots, which precluded being able to see Peter. A CME is due to arriv
Hi Jim and LF Group My 136kHz coil is a rewound Decca coil with two layers of coil and the original variometer, which was also rewound. This gives a coil with an inductance variation of 1.7mH to 2.2m
nice signals from your transatlantic triumvirate: BMU and AQC about equal strength here, LDO some 2 dB weaker around midnight UTC. Yesterday, QRN was lower and signals were quite audible beating aga
I will transmit with more power but for a shorter period (2300 until 0100) for the reasons described earlier. I will transmit QRSS 60 second dots on 72.3994kHz The transmission has been on since 2300
Hi John et al, My wife has reminded me of a social obligation tonight. If anyone is running, I will start the recording before >we leave, and hopefully can check it by 0200. The wx forecast is fine f
From G3JKV G3AQC 72 401.3 1 Hz shift -9.3 dB G3LDO 72 399.45 -10.0 dB Only 0.7 dB difference here so if one is seen the other should be as well. Many thanks to those who sent signal level and frequen
Hi John, That's 72.399, correct? Yes my typo, 72.399kHz Not seeing anything there yet, but appear to be in the middle of Laurie's first "G". That shows conditions are reasonable Regards, Peter, G3LDO
Hello Peter and All, Some QRN. Good luck. 73 Walter DJ2LF Many thanks for the report and the frequency check Regards, Peter, G3LDO Web <http://web.ukonline.co.uk/g3ldo>
Up and running on 72.339kHz on QRSS, 30 sec dots right now 2130UTC Thursday. No problems except for the usual one on 73kHz - no matter how many turns you put on a coil former you never seem to have e
Hi Laurie and John and all You were visible last night from my start at 2300 to about 0500. The best period of copy was the second one that I posted, roughly centered on 0100, and there were "ups and
I have been out all day and have missed all the excitement! I did copy Laurie's 72.401 kHz transmission last night, with parts of the signal being visible from 2330 to 0700 Z. There were half hour pe
Recently I described some experiments with multilayer coils based on a Decca coil. The resultant coil is now similar to that shown in the LF book, page 13 (See the second coil back) except my coil ha
I'm finally QRV to listen(look) again. I feel more comfortable at first on 139.9 kHz. I wonder could some transmit on 135.9 es others on 73 whatever. That way I could gain confidence in my receiving
YES we have, but haven't done much about it yet! :-) As you probably know, we (AMRAD/DARC/RSGB) awarded the 1st "over the Atlantic" Peter Bobek Awards last month for a two-way communication that took
