No Steve, this doesn't work. - Although I fell into that trap initially. For a Thevenin network, if you connect an external 1V source, you will get either 2A or zero flowing depending on polarity, as
Can tell you come from a university background Jim, do you ask that of applicants for courses at herts.ac? I was asked exactly the same question when applying for Southampton Uni. in 1976. Andy G4JNT
By active participation I trust you allow for those who write software for the so called and decried 'automatic' modes. All those individuals who designed the packet system, Pactor and closer to home
Beacause the optimum lowest loss matching network is always the one with the lowest possible Q. And the lowest possible Q is given by an L match. Here the L match is formed by the series inductance w
To add to the confusion a little. Has anyone noticed the change in coil (or loop) Q that is going to occur over temperature ? By my reckonning, over the temperature reange 0 deg to 40 deg (in a shed
I was going to say something similar. Both EME and Meteor Scatter make use of rigidly defined QSO formats and R definitely means Roger/Received OK so you need another symbol to request a repeat. How
And don't forget the 144MHz programmable repeater shift for listen though on MB7LF. Or the 100 Hz digital voice option :-| Andy G4JNT Could you please tell me if you know any off-the-shelf (or easy t
A small horizontal loop cannot generate vertical polarisation though, so presumably it just radiates vertically upwards, in which case what does the polarisation come down as after reflection ? Will
Isn't the most logical one YYYY/MM/dd ? Does anyone use this format routinely ? Andy G4JNT -- Original Message -- From: Dexter McIntyre <[email protected]> To: <[email protected]> Cc: <low
I have a suite of programmes that calculate distance bearing, as well as a height database of the UK for plotting terrain maps and microwave paths, plus a database of most of the decent highspot. /P
That's not fair - its much too big at lamda/10 ! A real scaled EH antenna for 10GHz would be more like 0.5mm high and 0.2mm diameter. Andy G4JNT Here in Italy there is great interest around EH antenn
Is there any evidence, anywhere, showing that one of these wonder antennas produces more gain than a conventional short monopole of the same heightand here's the important bit - given the same amount
I carried out a series of tests on Rayners formula for inductors a few years ago, making up single layer coils between 20nH to 1mH and measuring them. All were within 20% of design, and most of the v
Shouldn't we be concerned about that report? It suggests there are effects of RF on biological tissue other than heating, and if the public got to hear of these findings there could be yet more uninf
Err.... Hugh, I don't HAVE a web site, and don't intend creating one in the near future. What have you read, where ? Probably probably scurrilous fibs and fantasy Should I be concerned ;-< There is t
If you are in the house it is attended operation. Personal beacons are intended for reception by radio amateurs and are not classed as broadcast type signals. Look at your BR68. The way I overcame th
Hi Jim - Can I have a copy please - to the other account [email protected]. If it uses the design I think is most likely - is it immune to even harmonic distortion products in the output waveform.
Tnx. That's quite a large range ! Andy Tnx to all who replied on this subject. BFI seem to be the preferred UK supplier for micrometals. I actually need some of the smallest cores T20-2 or similar fo
I think all three versions are functionally similar, and the cancelling of the input sideband is something that falls out of the maths. If you consider the 90 degree phase shift to operate only at th
Yes that is correct according to the sheet of trig identities on the wall above my desk. But as I wrote it, the top mixer input is not SIN(A) and COS(B), as the LO signal does not have the 90 degree
