Hello expert LF'ers! The centre toroid of my three toroid LPF heats up on the longer transmissions like WSPR15. I have added a small fan as a crutch (thanks N1BUG!) but I guess that's a crutch for in
Hello Alan, Jay and Stefan, Thanks for the replies. When I say "gets hot" it's not mad hot, a cheap IR gun shows about 68 to 75 degrees Celcius, but I don't like unattended things that get hot, for o
Hello N1BUG, Paul, I would have thought what wire was NOT wound on the toroid would also get hot if the current carrying capacity of the wire was inadequate. Is that the case? Have you got a thermoco
Hello N1BUG, The core, being dust iron, must have good heat transfer, so i would expect the whole core would heat to much the same temperature, even if the wire itself was the source of the heat. Can
Hello Luis, Thanks to you and Oscar for sharing, that looks deliciously powerful and dangerous, I am liking that a lot :) I wonder what Oscar did for a filament choke, could you ask him please? -- Be
Hello Luis, Thanks to you and Oscar. Yes of course, it's a tetrode niot a triode so no need for the filament choke. It looks a nice bit of construction and should whack out a good signal! -- Best reg
Hello LF 'ers, I am trying out a Red Pitaya on LF RX. It's running the open source HPSDR software which I have never really liked or got to grips with. With huge respect to the writers it always seem
Hello Paul, Get a big shovel out, weak excuse ;) Seriously though, the UK stops with a bit of a flurry of snow, hope you can get back with a big signal soon, I'm still trying to find time to re-do my
Hello LF'ers, Thanks for all the replies, I will try building a splitter first and see how it goes, sorry if i have opened a bit of a can of worms ;) My aim is to use my Red Pitaya and HPSDR firmware
Hello LF'ers, Been Googling and see a mixed response to should a receive pre-amp go before or after a BPF. I have mine before the pre-amp, does the panel concur with this being correct? Thanks! Aeria
Hello Andy, OK, thanks for that Andy. I can see one future snag though, if I use both "aerial" ports on the Red Pitaya and an antenna splitter so I can receive LF and MF at the same time, I will need
Hello LF'ers, Is everyone iced up? A dearth of LF transmissions from the UK and the EU of late! (My excuse is a lack of time to rewind the loading coil and add a motorised variometer for civilised tu
Hello Laurence, He hee, take your damned weather back with you when you go, we ain't used to this ;) What's your setup in the UK Laurence? Here for a while? -- Best regards, Chris mailto:dead.fets@gm
Hello N1BUG, And he has the electric bills and a suspicious wife looking for flashing lights at night in the shack to prove it <LOL> I'm turning the CH down and taking irregular baths to show my dedi
Hello N1BUG, Me: "Oooh, look, Paul's heard me again, that's 3 times last night" `Er indoors: "I'll send him a percentage of the electric bill on an invoice then, what's his address....?" I just remin
Hello Luis, My take on Ebnaut is it's undoubtedly a superb medium for low signal level transmission and reception, but until someone makes it available as single package that installs itself like WSJ
Hello Andy / LF `ers Talking of loading coil matching I have just added a Russian standalone variometer to the earthy end of my loading coil. Previously the coil had an internal home made variometer
Hello Paul, I can set my grabber, just let me know what speed and frequency. It can be reached here when it's running : http://www.chriswilson.tv/grabber.html -- Best regards, Chris mailto:dead.fets@
