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![]() wrote in message oups.com... PCR1000 noise commnets: I traded for a PCR1000withthe DSP module. I wouldn't have spent ~$500 for it, but as part of the trade it is a usefull radio. Not great, but a radio with some clear uses. PC noise can kill your efforts to receive LEO WXSATS. Use good quality coax. A diskcone isn't the best, or even a good choice. Consider a homebrew QDH instead. Mount the antenna away from your PC. Make sure you PC, monitor etc is WELL groudned. This means more then a 8' ground rod! You can't have too amny Feritte RFI beads on your coax, and all the lines into/out fo your PC. Keyboard, network, modem, telephone line, printer ect. Use an isolation transformer between the PCR1000 and your PC!!!!!! One with a internal RF shield is prefreerd but the radio shack 10:10: automotive transformer is much better then nothing. You might consdier building an 8ohm:10K step up islolation transformer. I used a rat shack 8ohm:1K, the a 1100 ohm fixed resistor and a 10K pot feeding a 10K:10K(with internal RF shield). Bond all of your equipment with 1" braid to the best ground you can get!! If your PCR1000 has the DSP module it will run HOT. I added self stick 1/2 rubber feet to allow air flow. It really helped reduce drift. Terry Hiya, Terry Thanx for all the info. I like the idea of the isolation transformer a lot. I'm getting the idea that it may be absolutely necessary given what I have heard thus far. I dont have the DSP module in it, but I may eventually order one. I have the UT-106 in my R75 and I use it all the time. I know the discone wont be a good antenna for weather sat images. I figure I'd make a discone as a multi purpose hf antenna. It probably wont cut it for weather sat, but I figured I'd give it a try. A quadrifilar helical antenna would be good for that, but not so good as an all purpose antenna. I'll probably make the discone for now and build a quadrifilar helix later on. I'm also going to try out my two roof antennas with the PCR-1000 and see if they do anything useful. Michael |
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