It's DE M0DSZ M0DSZ M0DSZ IO82LS IO82LS IO82LS using QRSS60. I can't send a longer message without the laptop crashing. This frequency is being used temporarily as most grabbers seem set to display D
This is to confirm that I am running some tests on 136.173kHz, QRSS60, latterly 150W dc input to a linear amplifier, mainly to determine aerial tuning and loading. I was too close to 136.172 earlier
Yes Mike, very likely. I'm starting up in a few minutes, having had the "synthesiser" on for an hour. I have a 1:18 turns ratio output transformer on a pair of dust toroids and it looks as though I n
Hello Chris, it has been running since about 1115 this morning with no change and, by my reckoning, just shy of 136.173kHz. 73, Hugh On 17/10/2014 15:10, Chris wrote: Hi Hugh, Pretty sure that is you
On finding my "sacrificial" laptop I use for radio will not handle Opera, this is a welcome request. I only have to tweak my receive antenna properly to participate. Hugh M0DSZ Mike, G3XDV == BTW, wh
I am horrified at the prospect of broadcast radio becoming entirely digital not the least because the system(s) chosen are likely to be years out of date and totally inferior. Here's hoping Droitwich
I haven't yet successfully decoded anything with Opera on 136khz in spite of seeing some very big, clear signals on the waterfall display. HF results are very satisfactory, especially on 30m. This pr
136khz it is then. I will be listening and transmitting Opera and QRSS (speed dependent on PA dissipation), input 220 to 300W from a 300W audio amplifier, 12m vertical balanced feeder and 140m horizo
Thank you for publishing this Graham. Much of the power is lost in the iron dust output transformer, it runs very hot. I'm awaiting a ferrite toroid to see if I can rectify this. Meanwhile on 136khz,
Glancing at Spectrum Analyser late this afternoon there were several signals including one strong one consisting of a series of dashes on 137.233khz with large sidebands 300Hz either side. Who or wha
They are not much good above audio frequencies and the turns ratio is not convenient either. I should accept them and sell them on to enthusiastic builders. I'd quite like, say, a 500VA 40+40V toroid
Thank you for the transformer source Chris, Hugh, M0DSZ OK, thanks Stefan and Hugh, I don't think they had anything over about 18V secondaries. I got my toroidal transformer for my G3YXM 136kHz amp f
As an invitation, from 0900 I shall be monitoring WSPR on LF from NW Shropshire for anyone in the Lake District, Lancashire, Merseyside, Mid & S Wales, the West Country, Devon & Cornwall who would li
From a N-S orientation I changed it to SE-NW during the afternoon, hence the small change in levels. 1104 -25 0.2 0.137451 0 G3XIZ IO92 17 1114 -25 0.1 0.137451 0 G3XIZ IO92 17 1124 -25 0.1 0.137451
I forgot to mention the N-S orientation that's why. Today's preamp uses a ferrite rod aerial and it was in order to assist those living in the areas mentioned. I changed it to SE-NW later. 73 John F5
I would recommend type 77, I use an FT240-77 up to 400W and it's scarcely warm. The price is good compared to the Ferroxcube alternatives. Hugh, M0DSZ On 17/10/2015 17:11, Ken wrote: Hi Stfan. I have
So far the only person to decode my WSPR transmissions is Joe, DF2JP. I made a drive unit for 136kHz to utilise 4 different methods of modulation including quadrature switching for SSB. Having just d
Unequal in amplitude Andy. the cure was simple but ridiculous. I had set the internal preset balance with the I & Q gain pots about halfway but what I didn't check was that I & Q remained identical
Thank you all, I replied to Andy, G4JNT. Having used a ganged potentiometer from an old sound mixer for the input gain, I'd forgotten over more than 20 years that it was a log/antilog pot so that's s
Amongst some ferrite rods, I have 3 identical, all with LW & MW windings. I could remove the windings and make a fat bundle of the 3 then wind another coil for an LF preamplifier to improve on my exi
