CRYSTAL MIXER EXCITER FOR 137KHZ All my attempts to construct any sort of VFO/synthesiser/divider have ended in failure. I am not sure why I have such a reliable failure rate with digital circuits -
Receiver setup here working much better. With slow CW not bothered by Loran any more 19/2 1930 Worked ON4ZK on SCW, O both ways although he was audible 19/2 2145 Worked DF3LP on SCW, O both ways. Fin
Sent a CQ in SCW at 1840 on 32/2 Received a reply from what I copied as DL2OCH who was readability M On the next over the dot length had been lengthend and the call was read as DL2KCL readability O b
In the past I have complained a lot about Loran, which is quite strong here on the South Coast. Viewing the band using Spectogram shows that within the bandwidth of the narrowest CW filter there may
Good start to the weekend. While testing my transmitter and antenna on Saturday afternoon the loading coil caught fire. One of the windings on the coil had slipped and an arc over occured which cause
Worked DL0YE at JO54NG on Saturday Put out a CQ on Sunday morning at around 0815UT and saw "WV K on .706 Also another station on my own frequency which I could not copy because of a Loran line Tried
In the early days of 73kHz Toni, HB9ASB, reported hearing faint CW on the 73kHz band but no signal was positively identified. I had many skeds with Toni to try and get a signal to HB9 on 73kHz but no
Rik, ON7YD suggested the following method of reporting in SCW and this seems to have been adopted by all operators using this mode T = too weak to read (so longer dotlength required) M = weak but suf
G3JKV was right too. Please let us stop this discussion before more internet bandwidth is wasted. Such a discussion will not lead anywhere because of the laws of nature. It was stupid of me to enter
As computers get more complex we have to, metophorically, constantly reinvent the wheel. The old BBC computer had, as standard, a four channel A/D converter and children in science classes in school
Hello Mike, As usual, I will be operating from Pembrokeshire in south-west Wales from time to time over the Easter week. Some activity will be on the 73kHz band, especially on the 10th (I will try to
CFA Antenna I have obtained a copy of the patent spec for this invention. From a patent spec someone skilled in the art ought to be able to make a CFA without assistance from the inventor. You might
In the early days of 73kHz experimenting the only receiver equipment I had was a Datong converter and my mobile transceiver or the Drake 4c. The Daytong converter was designed for SWL use, had excell
we are very sorrow to record, that the member of our hf-committee, Peter.W.Bobek, DJ8WL, passed away on april 26 by a malignant illness. This is a great loss. It was obvious to everyone that he was a
Mike Dennison wrote: Further to my note on Radiation Resistance formulas, the highly respected 160m expert ON4UN uses 1450 instead of "160 (or 60) multiplied by pi squared" in his excellent book Low
does anyone of you have experience with EZNEC modelling software? Yes, I do As far as I know, this is the only software (except for the original but cumbersome NEC) capable of modelling the ground i
EZNEC modelling software is capable of modelling the ground influence on antenna feedpoint Impedance and conductor conductivity. By comparing a model with zero conductor resistance and perfect ground
Fired up the LF transmitter on 137kHz for the first time this morning after several months (my time and the mast being required for another project). I had to relearn a few things before I could get
There's been some discussion about filters etc recently which reminded me of a question I wanted to ask the group... What receivers/tranceivers work well on LF? and possibly.. What receivers or trans
Hello Dave Thank you for responding to my enquiry. I was quite supprised to get the response from ZL - I expected the response to come from just across the water in DL. I can scan the 1988 Siemens ca
