Dear LF Group, The WOLF 20 beacon is running again (from 2230utc) on 503.800kHz with 100mW ERP. Any reports would be welcome. Cheers, Jim Moritz 73 de M0BMU
Dear LF Group, The WOLF 20 beacon is running again (from 2235utc) on 503.800kHz with 100mW ERP. Any reports would be very welcome. Cheers, Jim Moritz 73 de M0BMU
Dear LF Group, It seems that I can only make postings to the LF reflector from one of the two PCs I have connected to the broadband modem. The one that works is an old machine with Win98 - the one th
Dear Rik, LF Group, The IR2110 delivers only a little more gate drive than a TC4426/7. Recently I have been uprating my 10W EER transverter to 100W - driving the Mosfet gates is about 3.7 times more
Dear John, LF Group, In principle, either method ought to work. To relate the current in the "sensing" loop to the induced EMF (and therefore the flux) in the main loop, you need to know the mutual i
Dear Mal, LF Group, I'm afraid there isn't much chance of getting the 136kHz Loran problem sorted due to potential interference to commercial users - The main users of this part of the spectrum seem
Dear Graham, LF Group, Re: noise generation with class D amplifiers - this is not really a problem with the amplifier, but has more to do with the way the signal is produced. If you apply an FSK or P
Dear LF Group, I have been trying to D/F the "VVV TEST" signal on 500.5kHz for the past few days. The SNR here has not been good enough to get an accurate null using the loop antenna, but the bearing
Dear Malcom, LF Group, I have PSK31, and capability for other "linear" modes, on 500k. The rig here is an IC718 operating at HF with my EER transverter, now uprated to 100W PEP, which is enough to re
Dear LF Group, I had the RX on monitoring the mystery "VVV TEST" signal to see if it would get strong enough to get a better bearing with the loop, when around 2230utc I noticed that there seemed to
Dear John, LF Group, There is no strict limit on the frequency range of a particular type of ferrite, rather there is an optimum frequency range depending on the application. All ferrites have losses
Dear John, LF Group, First, many thanks for your continued efforts in getting us access to these out-of-the-way, but interesting, bits of spectrum, and I certainly look forward to an extension to my
Dear LF Group, I intend to operate the WSPR mode beacon on 503.50kHz +/- again tonight, hopefully QRV from around 2300utc for at least a few hours. Any reports would be very welcome. Cheers, Jim Mori
Dear LF Group, Just saw first decode this evening of WE2XGR at 2348. Also, a couple of spots of M0BMU by PE0MGB have just appeared on the WSPRnet database. Cheers, Jim Moritz 73 de M0BMU
Dear LF Group, Will be watching out for XGR/2 from 2200utc. In the meantime, I am transmitting CQs in JT65A on 500kHz, with 502.00kHz "dial" frequency, in case anyone over here would like a stronger
Dear Uwe, LF Group, I downloaded the WSPR software last night and attempted to receive your beacon - but not until after 2300utc, at which time I could not see your sigs at my QTH or on DF6NM's grabb
Dear Klaus, Laurence, LF Group, I have been doing some experiments with WSPR on 2 PCs linked by audio cables. I would certainly agree with KL1X about the importance of clock accuracy - I found that a
I have recently uploaded a pdf file, "BPloops2.pdf", with an article describing loop receiving antennas I have built recently for the 500kHz and 136kHz bands, to the UK500kHz google group site ( http
