Uwe, According to my reference book the dielectric constant (permittivity) of PVC varies slightly with frequency. At 1khz the value is given as 3.1 and at 1Mhz as 2.88. I hope this helps ! 73, de Der
From Derek Atter After the very successful LF Forum at the RSGB Windsor HF Convention in the UK last October, it was suggested that there may be support for a similar follow-up session in about 6 mon
From Derek G3GRO Andy, I am pleased to hear that the Flight Refuelling Club are able to offer an alternative venue for the proposed LF Forum and I hope that the session will be well supported. We hop
Mike, Re your plan to try a loading coil with thinner Litz wire - CARC still have plenty of Litz in various thinner gauges if you need any. Regards - Derek Atter G3GRO Yet again, many thanks to Jim f
Dear Wolf, The Crawley Club have a quantity of "HF" Litz wire available with different diameters and number of separately insulated strands suitable for making high Q loops. Probably the best would b
From Derek Atter G3GRO, Many thanks for the many messages of support received via the LF Reflector and also for the support given at the well attended sessions of the LF Forum at the recent HF/LF Con
Thanks to all those who posted initial comments on the reflector re MB7LF. It will actually be Stewart G3YSX who will be presenting the short paper at Windsor on Saturday 13th October with some recor
From G3GRO/G3YSX Initial tests have begun to relay the whole of the 136kHz band from a remote receiving site located at IO91VC as an experiment. The relayed output will be initially on 144.9876Mhz US
From : Derek Atter, G3GRO, 6th Jan 2002 To users of MB7LF in the Surrey, Sussex, and Kent area, please note that as from today, the experimental remote 136kHz receiver relay on 144.985.7 Mhz to 144.9
Mike, I collected 4 spare IRF250 power Mosfets for the Decca TX from the Crawley Club at the meeting last night and will stick them in the post to you soonest. I was unable however to find among the
Dear LFers - Re a possible LF Round Table this year : The Crawley Amateur Radio Club have confirmed that it would be happy to host such a meeting at our Clubhouse. The club have a pretty full program
Herewith a reminder to UK LFers regarding the forthcoming LF gathering at the Crawley Club next Sunday 21st July. Doors open at about 10-00am. For more details see the programme page of the CARC webs
To UK users of the MB7LF remote LF receiver in the Crawley/Gatwick area : The large receiving loop forming part of the Loran canceller on the MB7LF system has recently suffered accidental damage so t
Hi all, Re Alan Melia's posting on E-field antennas (Aug. 25th), I confirm his comment that I did carry out a number of tests on two E-field active antennas each having roughly a 3m whip, one an ex-D
From Derek Atter G3GRO Re the earlier discussion on cross-band LF DX I have been off-line for a couple of weeks or so due to family visitors so my apologies for a belated response to David G0MRF's qu
Herewith a correction to my note re E-field antennas. The active antennas in fact both used approx 1m whip and not 3m as indicated in my note. ( I must have been thinking in feet and writing in metre
Hi Jim M0BMU/ Laurie G3AQC/ Dave G3YXM, Heard the three of you at good strength this morning on 73kHz but no sign of Ian GI0AYZ. 08-00 UTC G3AQC (RST589) in QSO with M0BMU (RST579) 08-25 UTC G3YXM (R
Hello Valerio, Many thanks for your call on PSK31 mode yesterday on 14Mhz. I had just completed my 1st QSO on PSK31 with a local station who was helping me to configure the system via a 2m talk-back
Hi All, Herewith further info re the planned LF expedition to Porthcurno, Cornwall next weekend. I am pleased to say that Jim Moritz M0BMU will also be taking part and we hope to be QRV on both 73Khz
To Simon GM4PLM Congratulations Simon on making the first GM-YU QSO on 136KHz also to Teo YU7AR for his part. - You really seem to have got the bit between the teeth on 136KHz since David's visit!! V
