Walter We know that there is roll-off at the top and bottom of the passband, and we do intend to charaterise this and build a pre-emphasis system, however we will shortly be changing the equipment, a
gii3kev wrote: Walter Blanchard wrote: At 08:17 26/10/01 Friday, G3YMC wrote: ................................................................................ Ideally these transmissions should be in
It is great to live north of Watford where we have freedom of speech and expression and plenty of real estate for real LF antenna experimentation and an abundance of MERCEDES BENZ to drive on roads s
I see from the attachment that there are also plans for relaying the 136kHz band on 10 and 6 meters. Please announce on this reflector when those QRGs will become operative. I have no chances to rece
This lecture is part of the IEE Surrey Branch Evening Lecture series and may be of interest to members on the list. All are welcome. Stewart G3YSX Wednesday 5 December 2001 7.00 for 7.30pm The Rise a
<snip> What radio amateur is going to go to all this trouble for an occasionl QSO. It all depends on whether ones personal interest in amateur radio is exchanging information that is more readily exc
A second note from the USA Stewart G3YSX -- Original Message -- Subject: [Lf] A modest proposal... Date: Fri, 16 Nov 2001 18:29:05 -0500 From: Andre Kesteloot <[email protected]> To: frussle@e
Some thoughts from the USA Jake, Like Bob, I am also intrigued by your proposal. When wavelengths exceed 7000 feet, it is hard to construct directional antennas inside a one tenth wavelength box exce
I had a QSO this evening with Bob G8RW on 1.8 MHz cw, and he gave the reason for giving up 136 kHz as severe QRM from his neighbour's cable TV. 73, Alan, G3XZX I understand that he is in Bromely, whi
Use three push-push doublers in series. minicircuits do one, but the LF spec is 50KHz, so you might have to build a discrete one for the first stage (center-tapped transformer, two-diodes and a capac
Andy Maybe I am missing something here, (and I am certainly not trying to detract from an excellent piece of work) but couldn't you also take the one second markers from MSF using an AM receiver, and
I thought that the paper below on the update of the WWVB LF transmitter system was interesting. 73 Stewart G3YSX http://www.boulder.nist.gov/timefreq/general/pdf/1406.pdf
Andy Presumably you have seen this: http://www.hanssummers.com/radio/huffpuff/contents.htm Stewart G3YSX A request for anyone out there who was receiving RadCom or any other magazine, before I joined
Other possibilities are: 1) the HP 10811A alone. An excellent oscillator, and you may expect some parts in 10^-8 per year from a good unit operated continuously. But keep a spare unit... I've seen so
I have a first edition and a third edition. The material is only in the first edition. A very brief look at Balanis "Antenna Theory" has the passing comment that proximity effect can lead to greater
Are there any plans for an LF Roundtable this year ? Crawley ? In principle the Crawley club would be able to host this, although we would have to discuss it at committee before we could make a comm
I got out my copy of ISO/IEC 13818-1 which defines the transport system for digital televison. DTV systems have an accuracy defined by their 27 MHZ system clock. Everything is defined by that clock f
Wolf The sharp phase transition may well be a broadcasting centre handover. Using TV frame reference is a neat idea, because in order to stop the most destructive type of co-channel interference the
Dick Rollema wrote: To All from PA0SE Not all TV-stations derive their sync-signals from stable frequency sources. Harry, PA0LQ, has investigated this matter some years ago and seemed to remember tha
A friend and I are trying to repair an old HP counter (HP 5345A). One of its faults is a failed HP 1820-0610 , which has the commercial equivalent MC8309P. Does anyone on this list know a reasonably
