Electronics > RF, Microwave, Ham Radio
CB and Ham Radio Techs Love Their Bird Wattmeters
ftg:
--- Quote from: joeqsmith on September 24, 2024, 03:06:51 pm ---
--- Quote from: pdenisowski on September 24, 2024, 09:56:30 am ---I also like the fact that one of their teaser videos shows a Rohde & Schwarz ZNB vector network analyzer (despite the fact that Bird also makes their own VNA) :)
--- End quote ---
I thought it was pretty funny that R&S would use the Bird 43 as the first meter they show. Proving once again, it is the gold standard.
--- End quote ---
Heh, Bird 43 and Daiwa CN-801. Both classics.
joeqsmith:
I just skimmed it and noticed the slide but intend to watch it later.
Buried in this thread there are links to people that will series up several of the Bird meters. True Bird fans always seem to have more than one. :-DD :-DD
I no longer hold a ham license and do not own a CB. The only transmitter I have intentionally broadcasted with was this thing. Note the use of some salvaged analog meters to measure the match and aerial current.
https://www.eevblog.com/forum/rf-microwave/fly-swatter-ham-radio-transmitter/msg5458907/#msg5458907
Wallace Gasiewicz:
pdenisowski:
You would sell more meters if you had a catchy song about your directional watt meter:
I know I posted this before but I cannot resist.
pdenisowski:
--- Quote from: ftg on September 24, 2024, 04:06:18 pm ---Daiwa CN-801. (Attachment Link)
--- End quote ---
joeqsmith:
My takeaway, R&S was limited to 25MHz min, 120W Avg.
At 2:24, it states the sensor can be used with the NRT2 meter or a PC with the virtual NRT PC software. It shows the connector but never talks about how this would connect to the PC. I would have guessed the PC connects to the NRT2 and requires it to talk with the sensor. But that is not what the video claims.
CBers and hams need to yell "audio" into the mic and watch the meters live. There was no mention how fast the bar graphs are updated. The Bird 43 is fast enough for both groups. We saw that one with the PC interface running at 1Hz and the ham/CBer was pretty upset how useless it was. I would think something basic like the update rate would be one of the first things mentioned and demonstrated in a video like this. I didn't see a mention of minimum power or accuracy.
The homemade one I demonstrated had maybe a 2kHz update rate. I would need to go back and look. I think I demonstrated it with signal levels as low as -30dBm. Downside to that unit was my home made coupler was limited to about 50MHz. I could have possibly characterized it and then compensated for the non linearity in software but as it was, I just used a simple point slope and called it a day. There was a third or fourth order polynomial fit to that Bird 43 analog meter graphics I ripped off. Far more math to get that to work. :-DD
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