Interesting. Enter a frequency, like dialing a phone, pretty simple. Repeater? F-RPT (function-repeater) turn the knob up or down for offset. Tone? F-Tone, again, spin the dial. 99% of my Yaesu's us
Still in production, HRO has them for under $300. If i didn't already have a couple HT's I'd buy one. Looks like a very handy HT. Dale, k9vuj _______________________________________________ RFI maili
That's a big clue which seems to have been ignored. If it _starts_ at 700 kc, then it probably isn't noise from an arc on a power line. Rob K5UJ _______________________________________________ RFI m
"then it probably isn't noise from an arc on a power line" Power line arcing is often easy to identify by viewing the AM radio audio output on a scope (you typically see spikes at 120 hertz indicatin
Take into account the radio, antenna, feedline, matching newtorks, et cetera... Power line noise can start at 60 Hz, continue up through microwaves, but many factors, as many as there are radios and
Author: "Michael Martin ( Mobile )" <mike@rfiservices.com>
Date: Wed, 04 Jun 2014 16:54:07 -0400
Arcing is in fact very broad however the broad range can be affected by the antennas ability to be resonant at those frequencies. An arc received on any band will only be received within the antennas
That's all true however those factors (antennas, feedline, matching networks etc.) don't provide a sharp cutoff high pass filter. If they were involved, he'd see a gradual attenuation in the vicinity
But it CAN be a characteristic of the receiver or anything else feeding it. Take for example my Kenwood TS-570. Excellent receiver, co-ax fed for MF and above, even receives AMBC down to the bottom,
I would be VERY interested in hearing audio recordings of power line noise heard at VHF or UHF using ANY and ALL of the HTs with AM reception. Why? because two years ago I bought an Alinco DJ-X11T fo
Paul, I've used the ICOM R-10 for many years for power line noise hunting up as high as 900 megs and it works reasonably well for me. The S meter action is more as you describe but the audio AGC is s
HI Paul, Here is a link to a youtube recording of what I hear on 136 MHZ AM using a small handheld scanner (Radio Shack Pro-94) that has the AM aircraft band when listening to power line noise (in th
I previously said "Here is a link to a youtube recording of what I hear on 136 MHZ AM using a small handheld scanner (Radio Shack Pro-94)" By the way if you look at the audio waveform of the noise in
Thanks Don! I really appreciate the info. I picked up a CATV signal meter (Wavetek SAM IIID) which is great for hunting power line noise but very bulky to carry around. I would really like to have an
Thanks Don. That sounds very good. That is what I would expect and would like to find in a wide range receiver. I already have a modified MFJ-856 so I have the aircraft band covered. There are times
I've got a DJ-X11 and there are a couple things to check. ATT on or what setting, low high or off; Audio, high cut on or off; Gain 1 thu 10. It's a good receiver and covers everything. I use mine up
Does anybody have settings that work for the Yaesu VX-3R. It's all mode receive and can use either the built in bar antenna or external in AM but so far I can't get it to hear the RFI in the noise. 7
Don, The VX-3R has an HF sensitivity of 3 uV on AM which is equivalent to an S-5 signal. Couple that with the reduced antenna factor of a portable antenna, you might not be able to hear anything but
Tom, How is the AM sensitivity Low-VHF and up? Any AGC or other insummountable fixed settings that might make it a poor choice for RFI-hunting? Thanks - David KD4E Don, The VX-3R has an HF sensitivit
Don, Here is the sensitivity chart for the VX-3R: *Sensitivity*:3 µV for 10 dB SN (0.5-1.8 MHz, AM Radio) 3 µV for 10 dB SN (0.5-30 MHz, AM) 0.35 µV TYP for 12 dB SINAD (30-54 MHz, NFM) 1 µV TYP for
I can hear the airport beacons below the AM-BC band fine. I was wondering about the impact of other variables; resonance of the antenna, lightning arrestors, antenna tuner, rig ... That aside, how's