Stunning noise blanker performance from old Hygain V 2795 CB radio

Stunning noise blanker performance from an old Hygain V CB radio model 2795.
Noise blanker OFF: S9+ noise without any stations copyable.
Noise blanker ON: Noise is COMPLETELY GONE, stations sounding free and clear.
I did the same test at the same frequency using a $1500 ham radio, and its noise blanker had ZERO impact on suppressing the noise. Go figure.
The noise came from porcelain line insulators gotten wet on the above-ground power lines that we have here (10 kV), after a rain shower.

Category:

Science & Technology

Tags:

• Hygain
• 2795
• CB
• freeband
• export
• noise
• blanker
• AC
• power
• rain

[coheher]

Continued - I mean, if you observe the video in detail, you can even hear the noise subsiding momentarily in the video, during a point in time where the noise blanker is actually turned OFF. At that point, you momentarily can hear the same station (with the same signal strength) that can be heard crystal clear when the noise blanker is ON. That is proof that the NB switch is not some kind of gimmick that desensitizes the receiver like you suggested, it is a REAL SSB noise blanker.

[coheher]

No, you are completely wrong. This radio has separate circuits for the AM ANL and the SSB noise blanker. The AM ANL is basically an extra diode in the AM detector creating an extra treshold for noise (line the ANLs on all Cb radios), the SSB NL is a circuit where a parallel wide-band path in the RF stage (followed by an artificial delay) drives a transistor  switch that turns off the main RF receiver path monentarily every time a noie spike happens. This is NOT an RF gain, it's a real blanker.

[coheher]

No, it is in original condition. Keep in mind that in stock condition, the HygainV model 2975 already has 3 bands of 40 channels each, 4 modulation modes including FM, as well as 25 watts PEP output power. So there was absolutely no need to do any mods to it. Cheers!

[VK4LA]

i like the old cb radio...had something similar back in early 1980's in Australia

[coheher]

@VK4LA Yeah i It's a good radio. Made by the Cybernet company in Japan, in the late seventies. Cybernet made a whole bunch of radios for other companies as well like Ham International, Lafayette, Midland, Hycom, Senfor, Amroh, J.C Penney and so on. Their main competitor was Uniden. The latter is still in the business of CB radios, Cybernet went belly-up, or maybe they just stopped making CB radios, not sure.

[slingslingbinks]

My old Hy-gain 5 was a 23 channel unit, I even found a slider for it. Good luck and don't ever sell that c-b.

[sboxjunk]

So did you modify this radio?