Spurious signals in VHF 135-150 mhz band?
Spurious signals in VHF 135-150 mhz band?
I am trying to isolate a spurious signal that runs a portion of the VHF band. I see a series of spikes 25khz wide every 61mhz from about 135 mhz to 150 mhz. See screen shot.
I know these are from an external source as they disappear when I disconnect the antenna. (an external discone antenna)
Also, I know they are not SDR related, as I hear them in my 2 meter radio and its rubber duckie.
My best guess is a noisy power switching supply? (but there are lots of 'em around here. I'd probably have to kill circuit breakers to stop them)
Any ideas?
Russell
I know these are from an external source as they disappear when I disconnect the antenna. (an external discone antenna)
Also, I know they are not SDR related, as I hear them in my 2 meter radio and its rubber duckie.
My best guess is a noisy power switching supply? (but there are lots of 'em around here. I'd probably have to kill circuit breakers to stop them)
Any ideas?
Russell
Last edited by rgrokett on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
Reason: No reason
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