Alan If you don't get any 'local' offers get back to me. I definitely have the PS12/SPM12 manuals (or at least my database sez I have!) and fairly sure I have those for the PS3/SPM3- just not yet ind
Just going from memory here, but I think if the vertical height of the outer end of the active part (ie above the insulator) of the droopy radials is no lower than around 70% of the vertical height o
aerial with a MAT device - and an OSX connector. Grateful for helpful suggestions on the latter. 73 John, G3WKL Hi John Why not just solder a piece of RG-174 to the back of the OSX on the pcb-as sugg
Hi Jim While I have similar reservations there have been a few oil filled tuning caps used successfully here with tesla coils-not the best parallel to use but certainly close enough to make the prosp
Both these problems are standard fare in 'older' physics texts- anyone rember Resnick & Halliday, for example? There is another more interesting side to Andy's problem as stated however. Consider the
-- Original Message -- From: "John W Gould" <[email protected]> snip (only BT here in the UK offers "engineer assisted" as they own the "local loop"). But they don't own the house wiring, do they?
Murray A live one in SM5!! Cheers Dave Hello ! Many thanks to those who listened to my very first test with Jason and who sent a report. I am very glad to hear that it was readable. I am using the ZL
I believe you will find the multiple vertical wire arrangements are generally for mechanical stability and don't have a lot to offer electrically. As amateur top loaded antennas are generally a lot s
A certain well known ZL LF enthusiast used this method of antenna feeding some years back. But he forgot about curtains that move around in the wind etc, especially when least expected. Even just a f
According to Vol 1 of the MIT Radiation Lab. Series, "Radar System Engineering" published in 1947, the selection of 50 ohms was based on a practical compromise between the 77 ohm value giving minimum
Hi AlanWould really appreciate a copy of that CD. Check out the postage to NZ (airmail) and let me know the damage.. I'll send you cash if you want. Have been emailing Clive GW3WEQ on other matters r
Must be a B41 rx if you are tuning LF sigs directly- not a B40? Or are you usnig a converter? 73 Dave, ZL3FJ (who only recently reluctantly sold his B41-magnificent LF rxbut HEAVY!) For two Daves and
I understand that Steve Olney shut lofexp down from what I would term 'lack of interest'. I fully support that action. There's not really enuff interested locals (and resultant LF related internet tr
Had a play with one of the 'x-ray' machines recently 'cos of an EIP counter I was hand luggaging home that caused a few raised eyebrows- I was quite early for the flight and there was no-one else in
Laurence and othersWhile it's quite likely that the standard copper pipe story is true, the basic physics of the issue are fairly simple- for a given coax outer diameter it can be shown there is a br
Just a 'heads-up' for those interested in the topic of GPS DOs-(Disciplined Oscillators) as so far there hasn't been much publicity about this avenue of attack-other than in the EME crowd. http://gre
Too late-all the good looking ones are spoken for!!(or too far out of town) Dave ZL3FJ (begin stage whisper) "Bruce- Go get all those other good looking gullys quick- we should be able to make a kill
Rik The ZL1WB LF antenna is strung across a gully and has between 300 and 600 feet ground clearance. Support to support distance is around 1km but there is quite a bit of sag, as you might expect-hen
Have a look at the URL below to see a semi-decent horizontal LF antenna - that of Bruce, ZL1WB. Whatever its predominant radiating mode is, it works rather well! 73, ZL3FJ http://homepages.ihug.co.nz
Just a quick look at a map and the best you can do towards South America from Calais is about 7500-8000 km. Getting a long ocean path out of Europe is basically limited to that sort of distance, othe
