Well, you can but try! If it gets too hot it is useless. Don't forget the vital formula relating minimum number of Turns N, Core cross sectional area A (m^2) RMS Voltage V, and Saturation flux densit
Someone else transmitting a couple of Hz off frequency ? 'JNT Jim Many congrats on your report from USA. While you were beaconing last evening I noticed a strange phenomenon on your signal which I ca
N87 or N67 is a better material than 3C85 now. Also 3E5 and 3F3 and 3C90. In fact any ferrite meaterial specified as being suitable for power transformers. I don't know if torroid cores are available
The only problem with two tone signalling is if using very narrow bandwidths where signalling information is lost, such as I do from time to time to look right down in the noise. In the event where R
I think those monitoring are using the latest version of Argo that allows 60 and 90 second dots. I use different software / hardware than can go arbitrarily narrow. AGC is always bad news for any aut
As having a bit of fun ! But seriously, if your interest is propagation and testing then its as good as way as any of making a positive identification. And that is the prime purposes of these tests a
As a general point for computer-generated signals, if the soundcard or DSP could be persuaded to generate the >output at a few kHz instead of 800Hz or whatever, it would be a simple matter to mix the
--Original Message-- PA must be linear. Is this a though requirement for the present crop of PAs around ? How much would this requirement be of obstacle to the adoption of such a scheme (which could
Frequency cal for last nights transmission, M0BMU still ~2.99 and another strong signal I had assumed was Laurie but perhaps was someone else, on ~3.78(5) (measurement readout jumps from 78 to 79). I
Wolf - are you absolutely sure about the TV timebase frequencies ? My understanding is that ZDF sync pulse form a national standard for time distribution in D Land and should be exactly 15625.000 Thi
Bill et al : Laurie's signal showed the same frequency pattern after each long break - the excursion looks like a decaying sinusoid with two cycles of wobble before settling down. Clearly a temperatu
Until just before your finals at least, 15 Feb 1971 - it was half term from school and I went into Birmigham town centre to buy two 1N4007s for a valve PSU using the new money . Not sure why I wanted
That sounds more like a mismatch issue than dielectric loss. Standard PVC tape has a dielectric constant (Er) about the same as the polyethylene insulator in the cable. So as your joint must have inc
Regarding I/Q sampling (is this the same as the old 11+ selection, hi?) and filtering and smoothing to extract the phase, can we have a program please, so that we can join in the fun? You will need t
No it doesn't. Base 12 has factors 2,2,3 Didn't know we ever weren't metric in this country - apart from a few grandparents who remember the dark ages ;-#) No one I know actually has a feeling for ho
I agree with the best times, certainly after 0700z signals rise and noise levels fall. In fact, most mornings I see a quite abrupt drop in noise level a bit before 0700, well before streetlights go o
Is it a coincidence I wonder, that the 'standard' Soundcard / CD sampling rate is a multiple of the squares of the small prime numbers. ie: 44100 = 2 * 2 * 3 * 3 * 5 * 5 * 7 * 7 Spooky ! Certainly si
Alberto - How easy would it be to include a facility for storing the exact measured sampling rate in a .INI file that can be called up when the software is run. G3PLX included such a facility in PSK3
The recent talk about soundcard accuracies set me thinking. Tuning error and soundcard accuracy do not have exactly the same effect on the apparent observed frequency line in Argo or any DSP system w
Half of them have been replaced with internal sxcurity (*) staff now - and they wouldn't be bothered coming out of their warm cozy office just to see what some idiot is doing playing radio on the oth
