<?color><?param 0100,0100,0100> Laurie I think the critical factor in this discussion is the proposal to make a 'valid' comparison between the existing and additional short mast. To do this, in pract
Greetings All: I uncovered two ancient RF Thermo Couple Meters this evening Larry After checking them with the AC mains if you have an rf (LF) power meter or a dummy load plus a tee and scope to chec
I'm curious to know the ERP of VTX3 ... anyone reading this in India ? Well not from India.... According to very reliable info I have, but unfortunately dating from several years ago now, the VTX nom
Jim Probably not this time, but a suggestion for perhaps next time you go to Puckeridge. I mentioned this to Derek Atter, after I saw the picture of the antenna, as a possibility for an interesting e
Perhaps I missed it, but I would be very interested to know why the umbrella ribs are extended so far-- Hi John I have been in the habit of keeping some of the more interesting posts on this reflecto
While a bit dated now, mainly due to the100Hz display resolution (but 10Hz steps from the knob or up/down buttons on the microphone), the Yaesu 757 GX mark 2 is a good basis for LF work. The MDS(Mini
I downloaded the 'full catastrophe' from the LTC (Linear Technology) site some time back but it's on the pc at work. Output of the filter design pgm is in terms of varoius LTC op amps etc but useful
A good test .WAV file is the Z2 file that is still I think the best LOWFER beacon aural DX, a mainland USA LOWFER beacon copied in Hawaii on a portable setup. I have a copy of the wave file here but
--Second bit of message having hit the send button by accident!!!! The Z2 wav file is quite a challenge aurally as well. I had to listen to it several times before I could pick out the callsign. 73 D
If anyone wants info on the Salvor tx let me know. I have been using a modified Salvor on LF(albeit 180kHz) for some years now, they have a few quirks that are not immediately apparent-like the use o
snip However, this is for a short, basically E field, antenna. My gut feeling is that a magnetic antenna such as a loop would behave in the opposite way and the H field would roll off much faster tha
Here in ZL the line voltage (nominally 50) is reversed behind the low freq ringing as well- lotsa PBXs use the line reversal these days and not the actual low freq ringing signal- makes for faster ca
SPM12 IF freqs are 8 MHZ and 10 kHz. Be aware the 25Hz b/w is an option and may not be fitted. The PS12 is the matching level oscillator and the pair can be synchronously tuned using appropriate inte
Bob Vernall sed-- The other suitable type of capacitor is polypropylene. Tks Bob I couldn't remember the other capacitor type although I know I have a few here that you sent down a while back. Dave,
Hi Bill The aluminium stuff is two runs, each one having 7 strands of 1.5 mm dia Al - the drop-lead stuff - there is a very similar looking 'product' that is much more common as it has a steel centre
Bill A sed-- For those that are this crazy, the loop conductor will have to use #6 or multiple runs of smaller size wire and the capacitor will have to be...... well, something exotic! The 'Crazy' I
From Cesare I5TGC: > The Signal you receive is like a telephon call, some old systems use a 25 Hz a.c. difficult > that these signals can reach your receiver. Not difficult to hear if someone has a P
Dick Are the signals for which you experience the unusual carrier level variations typically the stronger ones that you are comparing? Is the lowest frequency at which they AM the carrier the same in
Walter etc-- As one who has done this a couple of times down here in ZL - it generates a lot of interest/activity and is definitely FUN. Forget the borax tossers- go for it! Matching should not be to
Hi Steve I suggest you take a look at the following URL- it is VERY inexpensive and I believe will do everything that you could possibly want. http://www.qsl.net/zl1bpu/ Go down a couple of layers on
