开云体育

Russell,

Both the WWVR and the Sudden Storm receivers performed well enough to receive my 10 MW transmitter into a dummy load next to the receivers. The Sudden Storm sounded really nice and pure of tone, and the WWVR sounded a bit of a heterodyne almost like a two-tone, but it heard my signal clearly. The Sudden Storm was right-on frequency both on 7 & 10 Mhz, the WWVR was about 2 KHz low. Both receivers had the rapid "electric fence pops" that I do not hear on my Penttek TR-35 or is 99% reduced. I can not compare a direct conversion receiver to my Penntek which is pretty darn good for a kit that costs even less than some of the Chinese HF radios.? I could not hear any other stations on my Sudden Storm 40, 30, or 20M. My indoor 1/2~ antenna with Tuna Tuna sucks. With the TR-35, I heard 5-6 CW stations and 2-3 SSB stations but did not have an Xtal to try the Sudden Storm on those frequencies of course. I tried opening a window and snuck out my 44' 30M 1/2~ wire and immediately the campground staff became entangled in it doing their rounds of reading the electric meters, checking the faucets for freezing, and spraying herbicide in these giant 20 acres pea-gravel parking lot they call an RV Park. So I started building an antenna kit I bought six months ago, it is a 3-band vertical for 40, 30, and 20M from QRPGuys which has a couple of toroids and 17 feet of vertical wire wrapped loosely around a 7M carbon-fiber fishing pole. This will be less prone to campground staff tripping over it, but also be transportable to any of our 13 campgrounds in the San Isabel NF that my wife and I run with the aid of our camp hosts. Any wood fence posts will be a good test and since power lines are generally miles away there are fewer opportunities for QRN except when someone is running their generator, but there are hundreds of day-use areas also that have no RVs to make QRN. Anyway, I can then continue running my receiver tests. The biggest challenge is that the audio levels in the headphones are about 20-30 dB too high in many cases. But, I won't mess with the gain until I can get out into the wild blue yonder to hear native signals that will help determine the real audio can levels required and possibly figure out where the "electric fence pops" noise might be coming from if I put the receiver volume higher than zero. My Penntek does not have an automatic receiver mute into from an external source or I would set aside my two tuna receivers and start building my Super Tuna ][+ TX, but my biggest issue is lack of time. Most of our hosts have been arriving the past few days and I am delivering water tanks and installing pump handles getting ready to do the water bacteria tests for the state testing labs. I look forward to our two maintenance men starting this week as well, carrying gold cart batteries for re-install is a PIA, LOL.

Attached is the antenna I am building. The toroids are so huge a blind man can build them, LOL.

Cheers, Davey - KU9L