There are two approaches to requiring registration. Either it's automatic, or it's manual controlled by the list owner. If it is controlled by the list owner, this can be quite a lot of work and ther
The 5MHz group are also discovering high stability Stewart G3YSX Anyone contemplating modifying their transceiver for milliHertz bandwidth Doppler work may find my account useful in avoiding a few pi
This is for the MK2-G, so I am not sure if it is the same part needed for the MK2, but it is listed in stock by HRO in the US. I think that there is more demand over there because this level of stabi
Following the presentation on Data at the HFC, I have been thinking about methods of generating Jason. It seems to me that one of the difficulties is building the transmitter, which either requires a
John Don't do it that way. The professional unit that I have, puts this function at the top of the mast and brings the output down the feeder. There is a good design for a passive antenna in this mon
Google returned a large number of hits in response to the term spiral inductance Of these, http://www.csgnetwork.com/spiralcoilinduccalc.html is a javascript programme, which you can see by doing a v
? sounds a bit long, all that you need is an otherwise unused letter with suitable hamming distance. How about 'U' Stewart G3YSX Andy G4JNT Laurie, John et al, Since I'm not directly involved, I shou
John This is actually an important topic, since our own installation, or that or our neighbours may have an impact on operating. To clarify Dave's point, the service provider ownes the first point of
I never experienced any problem with engineer installed BT ADSL effecting any radio, or visa versa. I was however on a relatively low-loss path to the exchange, and so was operating at relatively low
It will be in the IEE library Savoy Place, and the Patent Library in London, and the Science Museam Library at Imperial College. Stewart Peter: It was reprinted at Proc. IRE, #5, Vol. 72, 1984. I apo
Andy Since there can only be one solution, there must be an error in your original transformation i.e. ie SIN(A-B + 90) = - COS(A-B) and not +COS(A-B) as originally asserted. Stewart The ambiguity ar
Just thinking about this a little more, if you could generate the right dispersion characteristics in the IF phase shifter, can't you do the whole thing with a single mixer and IF processing? Stewart
I am not sure about the physics of this. The 90deg phase shifter has to be some sort of dispersion device (propagation time varies with frequency), and this will operate on the fourier components of
Andy I have a problem with the output 90deg phase shifter. I can see how you can shift the LO and the signal by 90deg, but the output from the top mixer has sin(A+B) and sin(A-B) signals present. Unl
Silly me, it's called dispersion. Sorry to waste the bandwidth. Stewart I have a problem with the output 90deg phase shifter. I can see how you can shift the LO and the signal by 90deg, but the outpu
Sorry about the spam. I meant it to go direct to Walter, and forgot that this reflector defaults to the whole group. 73 Stewart Hope you are well. Stewart Walter Blanchard wrote: There is an excellen
Please could I have a copy. Hope you are well. Stewart Walter Blanchard wrote: There is an excellent article detailing the history and giving a technical description of GBR Rugby in the current issue
The FCC said a new amateur LF allocation is not justified ''when balanced against the greater public interest of an interference-free power grid.'' The FCC said amateurs wishing to experiment with LF
The not beyond 30 June notice is still on the RA web site. A number of us were at Epsom. It's a pitty no one thought to ask Alan Betts if there was a possibility of further extension. Stewart G3YSX =
