Hi Johan Tnx for your observations and info on class E. connected in series, just use a single ended pa and choose the components to suit the power output required. The second harmonic and all other
John Your beacon was peaking S5 at 1732z then qsa 0 for periods and up again, characteristic of insufficient power for the freq at that time. It is the same on HF with qrp stns, in and out of the noi
Hi all Class D and E amplifiers are supposed to give around 80/90 % efficiency. Has anyone actually achieved these figures. It seems anything above 60% is hard to arrive at using normal coils/capacit
Beacon PAT on 499/500 khz has been reported on bearing 335 degrees from F6NCI qth. UR2IL has been reportred on 501.3 khz but not heard at my qth so far. News ends de Mal/G3KEV
Roman. Pse listen out on 500 khz. I am usually around 502.5 khz and there is also acty around 501.3 khz from GI4DPE. We both work normal CW. 73 De Mal/G3KEV/IO94SH Nothing in Moscow. Looked 136.31-13
Hi all To avoid any ambiguity xband working 500/HF. I will use the HF freqs at times and use QSW or QTV 505.5 khz as appropriate to indicate what MF QRG I am transmitting on I will use QSX 1833/3533/
Hi Jay Will pass this info to Jack/VE1ZZ on cw next time we work. I do not think he is on email. I am currently concentrating on 160m catching up with old friends across the globe. Look for me if u w
Jack/ve3zz informed me last nite on 160m cw that he was hearing lots of USA stns on 500 khz as far away as MS and would like to work them xband on 3533 khz if they would listen for him. He was also h
Hi all Obs last nite around 2230/2300 utc Nil dx hrd on 600 m fm the USA 160 m in good shape, worked W1MK,W1LEH,K2UU,KJ2S,W3GH,N4ZV,W8JI and VE1ZZ,VE3EJ. I went qrt at 2320 utc 73 mal/g3kev
I purchased a kit for a capacitance/inductance meter a few weeks ago from http://www.aade.com/ and it is working excellent for building my LF station. It took a couple of hours to build and has no a
Mal, As the result of becoming gray from learning how to do things the hard way, I now conclude that it is far better to FIRST lay out the theory of what I am intending to design. This would include
Some recent comments seem to indicate that all selectivity should be left to the FFT when using computer derived programs like ARGO and associated type programmes for narrow frequency modes like QRS.
In spite of what some say this device is very stable, but I use it inside in a fairly constant temperature, not outside in a garden shed. AGC is not necessary. On LF it is more desireable not to use
