Unfortunately, after a power cut Larry's frequency had shifted about 2Hz lower. This was partially corrected by midnight where I think he shifted back upwards again - after I'd retuned 2Hz lower and
Yes, thought someone had already tried a dipole up a hill. In that case I won't try dangling a long wire down from Portsdown Hill. If I wanted to install an (amateur) LF antenna at the works QTH (jus
A new subject now ..... Someone must have already tried this, but how effective would a (say) 100m long dipole laid down a chalk hill be ? Isn't limestone also the same material as chalk, Are there a
Peter - et al For some of us scientific experiements and measurement / understanding of the propagation medium is of far greater interest than merely trying to make QSOs. To me, the idea of being abl
--Original Message-- From: Rik Strobbe [mailto:[email protected]] Had a look for Larry's dashes over the last nights, but no positive bandwidths (0.05Hz and less). I can see the dashed l
Last night while transmitting BPSK for 15 minute intervals every half hour well into the night, I was making use of the opportunity to get on with the shack rebuilding. My radio room is an upstairs b
And knowing who now uses the LF site, it would be like trying to get a vist to any Txp-Sxcrxt defence base. Andy 'JNT When I worked for British Telecom (it was then Post Office Telephones) in the six
According to Tom Clancy, in "The Hunt for Red October" there is a transmission of coded groups to very deep operating "Boomers" at a data rate that appears to be in the region of a bit per second (on
I have been told that the current loading coil at Rugby now consists of an assembly made up of 50mm diameter copper pipe with a slider to permit rapid tuning changes. The coil is about 3m high and a
What is Liquid Paraffin as used in medecine ? or petroleum jelly (Vaseline) ? Andy 'JNT hydrocarbon ago......hope I got it usually popularly The paraffins are members of a series of saturated (no dou
Ko Versteg NL9222 stores some of it on his website, but can't remember if he has the latest ultra narrow band software. Most of the time I only need two progs for the 56002 itself. One, called DECIM0
I made some tests on polycarbonate sheet in fires and EM fields last night. The material tested is called "COROTHERM" and as mentioned earlier, is available from most DIY outlets Burn test - Does not
Sorry - I misunderstood, thought you were trying to digitally downconvert directly ! Yes, that would work quite well. In fact G4GUO did just that on 73kHz a few years ago using the 56002EVM with left
Will anyone over there have BPSK monitoring facilities If so, I will radiate a signal and hopefully we can agree a frequency / data rate beforehand. As I only have 60mW ERP, suggest a speed of MS500
Once you have a receiver whose gain can be set precisely, feed the audio output into an FFT spectrum display (not a waterfall plot) and that will give you the carrier amplitude - you should be able t
I've used a plastic dustbin for years, with no problems when it gets wet, although a ceramic high voltage insulator would be a useful addition in very wet weather to reduce surface leakage. The dustb
Albertoo et al - I was keeping away from having to use fast DSP and digital receiver technology for a piece of standalone signal measurement test kit to use in the field without a PC attached. 130dB
This Rx is intended as much a piece of test equipment as a portable receiver. For the IF gain the Analog Devices AD603, has 0-40dB gain with a voltage control of 0-1 V, laser trimmed for 0.3dB linear
Yes sorry, that should have read 137744.6 - got my kHz wrong. It gives me a slight problem receiving the VA.. 137.79 transmission as the carrier is close enough that even in a 300Hz filter bandwidth
Does anyone else see a carrier on 136744.6. It is particularly strong at my QTH (IO90IV58), on continuously and too stable to be a spurious from SMPSU, TV etc. Andy G4JNT -- The Information contained
