Jay, At least now I've seen some real evidence the gate drive overlap issue and ringing are related, if not cause and effect. Agreed mine is slow to turn on as well as off, though arguably being slow
Hello Chris, The only "something" I can think of would be a really small fast blow fuse. Fuses come in ratings down to 1mA at least but they tend to be pricey and a bit hard to find. I can't be sure
For sake of completeness, as there were some following this hoping to learn from my experience... After a break I went back to work on the amp. I swapped out the IR2110. No significant change. I swap
I am still not sure whether I am using that equation correctly. Chris, if you will forgive me for tagging along on your post, I'm trying to get this equation sorted in my head. Put no faith in anythi
Thanks Andy. I've added a page on this in my handwritten notebook. I do have some related questions which go beyond what Chris asked about. What about stacked cores? If we stack three cores, each hav
I realize iron powder cores aren't or shouldn't be used for transformers at LF. However they are popular for inductors in filters, Class E amplifiers etc. I was recently working with a Class E design
Some time ago a link was posted to a web page discussing equipment for use of EbNaut at LF (137 kHz). I was sure I saved it, but I can't find it now. Could someone post the link again, please? *Any*
Hi Chris, A common ground between TX antennas should be fine. The long wire is probably OK on there too, but there are so many permutations and possibilities I will add that in *some* cases it *might
Chris, Mine doesn't change at all from 200 milliwatts (which I use when tuning the antenna from an unknown condition) to 200 watts. We're still waiting to see what happens at higher power but getting
Hi Luis, This is good to see. I moved my RX antenna and these are the first X-Atlantic decodes at the new location. Thanks for TXing ! 73, Paul N1BUG On 05/18/2018 08:09 AM, VIGILANT Luis Fernández w
I have successfully decoded DCF49, HGA22 and DCF39 using MultiPSK. I read somewhere the stations occasionally transmit an ID among the packets, but I never did see one. 73, Paul N1BUG
Thanks Luis. In the past week I received EI0CF, F5WK, EA5DOM on MF WSPR. I could probably do better if I had a directional RX antenna. The vertical is very noisy with storms to my south and west almo
Hi Oscar ! I will look for you tonight. My web host has made some change which breaks the FTP upload, so my online grabber is not working. But I will have local copies of screen capture and will chec
HI Oscar, LF, I did not get enough to make any identification but I did see some QRSS30 elements on 475.000 just after my sunset. 73, Paul N1BUG On 06/09/2018 02:12 AM, Oscar Villafañe wrote: HI TO A
After a lengthy absence I have resumed transmitting on 2200m WSPR2 as of this afternoon. I intend to run through tonight testing a new amplifier. EIRP is about the same as before, 0.5 watt. 73, Paul
Thanks to all who monitored 137 kHz WSPR during the past two nights despite summer static. The W1VD kilowatt deck has performed flawlessly at the quarter kW level. Next tests I hope will be in some w
My only comment is that the ones I have heard seem to consistently drift 1 to 2 Hz during a 2 minute WSPR transmission. So if you wanted to use one for something like slow DFCW on LF, you would proba
Of course it could be the transceiver drifting, but curiously all I have been aware of so far moved in the same direction and approximately the same amount... who knows. Paul
Does anyone have ideas for receiver front end protection at LF and MF? I am worried about my TX signal damaging receivers. Of course the best idea is to disconnect the RX antenna from the receiver wh
Hi Stefan, I am thinking they only limit peak voltage to 0.6V? If that's right, then I think this is about +5 dBm, perhaps still enough to damage a receiver. I was trying to avoid switching because w
