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I need to have (build/buy) a frequency meter. I don't have the requisite gray matter to design one on my own.
Anyone know of a schematic for a frequency meter or counter that will work in the 27.405 mega cycle range? I guess it would have to have some kind of digital readout. Needs to be reasonably accurate to do rf and if alignments.
thanks in advance,
roN
Follow Ups:
........but these are on the spendy side.
Cheers,
~kenster
Wow, CB channel 40?
Best bet is to find a Ham Radio swap meet in your area and look for one there...that's how I got all of mine years ago...
Chicken Band was my gateway into Ham Radio about 20 years ago...band conditions were great and propagation got to where you could talk to Australia, Africa, Europe, and Asia with a simple SSB CB and a 3 element Yagi....then I got real and got my Ham ticket....satellites, packet, RTTY, AMTOR, CW, antique gear using AM mode, even QSL verified contacts with the Space Shuttle, all were fun, but have sadly been supplanted in my life by the Internet...in fact, I was a memeber of a small group of Hams here in San Antonio that developed a "high-speed" over-the-air TCP/IP packent network that was on the Internet before html coding was around....we also were able to run faster transfer speeds that contemporary phone line modems....
Back to the original question, alignments...well, the best way is with a sweep generator that will output at the IF freq of the rig you are working on and observation of the bandpass via an oscilloscope....did many a Hallicrafters rig that way in years passed...but, peaking and tweaking with a signal generator, a freq counter and an analog VTVM would work almost as well as sweeping the IF on most CB rigs...I liked the movement of the needle in an analog meter as it was easier to see just when the peak occurred vs. watching numbers ramp up and down on a digital meter....
Yep, your best bet would be to find a Ham, a Ham Radio store, or a swapfest in your area...or look on ebay...I used to have a bunch, but got rid of all the Systron-Donner and HP freq counters years ago...just have a Heath one now and the one built into my MFJ 249 Antenna Analyzer or I'd offer you one...
Good Luck and have fun!
know what that frequency was. I have a scope and a signal generator but I don't have any way to verify that the signal generator is actually putting out what is indicated on the vernier dial indicator.
To align the Johnson Messenger I and Robyn T240D radios that I have I need to make sure that the frequency that I want is what I am really getting. Hence the need for a counter or meter that can serve to verify what frequency I am actually getting out of the generator.
thanks
roN
.
Try looking up your local DRMO sites, as the military regularly dumps older counters, many of which are in good working condition. Only problem is you may end up with a small pallet of electronic test gear!
Stu
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