@locoman1963 Yes, noise level was high. I used a portable AM radio with ferrite bar antenna to triangulate general interference source location. Then used VHF aircraft (AM mode) reciever to ID the likely power pole. Power company confirmed using a VHF receiver with hand-held four element Yagi antenna (noise signal peaked when the antenna was pointed at the lightning arrestor). Power company disconnected them and noise was gone. The power company was happy to help. 73 de NG9D
@sz42781 thanks for viewing. This was just an experiment using a cheap 1.843MHz crystal from DigiKey and some other parts from radio shack and my parts bin. The oscillator, buffer and filter were adapted from common handbook circuits. The main enjoyment with something like this is the experimentation. The transmitter was never optimized and it tended to burn out the final transistor. If I can solve that problem and improve the efficiency I'll post diagram . 73 de NG9D
Good going!
gliderrider 1 year ago
congratulations, really interesting
technogatto 1 year ago
your qrm levels are high
locoman1963 2 years ago
@locoman1963 Yes, noise level was high. I used a portable AM radio with ferrite bar antenna to triangulate general interference source location. Then used VHF aircraft (AM mode) reciever to ID the likely power pole. Power company confirmed using a VHF receiver with hand-held four element Yagi antenna (noise signal peaked when the antenna was pointed at the lightning arrestor). Power company disconnected them and noise was gone. The power company was happy to help. 73 de NG9D
NG9D 1 year ago
what is the name of this rig and where can I get a schematic?
sz42781 2 years ago
@sz42781 thanks for viewing. This was just an experiment using a cheap 1.843MHz crystal from DigiKey and some other parts from radio shack and my parts bin. The oscillator, buffer and filter were adapted from common handbook circuits. The main enjoyment with something like this is the experimentation. The transmitter was never optimized and it tended to burn out the final transistor. If I can solve that problem and improve the efficiency I'll post diagram . 73 de NG9D
NG9D 1 year ago
@NG9D Any luck with the schematic?
KB9HJA 2 months ago
@NG9D Any luck with the schematic?
KB9HJA 2 months ago
yes let me see how it was made
reese1011 3 years ago
awsom do you have a schematic?
sz42781 3 years ago