Although I used someone's frequency counter back around the 1970s, I never owned one. From what I recall, back then, there was a BNC connector on the unit, where test leads connected and were used to determine the frequency within a radio stage, or used to check the output from a signal generator.
I'm looking on Ebay and seeing some costly ones selling for $100 and up, which have lots of buttons and connectors. -OR- seeing some that are listed to go from 1 CPS to 70 or 80 MHZ, which tells me that they can show audio frequencies, and up to the 70 or 80 MHZ limit, which means they will work for AM radio, many Ham bands, CB radio, but *NOT* FM radio.
Then what caught my eye were these inexpensive handheld ones, such as:
However, these do NOT have BNC connectors. Just an antenna. (No test lead connector), So, obviously, they can not read audio freqs, and can not be used to check the stage in a radio, but should probably pickup the output from a signal generator if the sig gen test leads are held near the antenna.
However, this device (above URL) only covers 50 MHZ to 2.4 GHZ. That means it's worthless for AM radio, CB radio, and many lower Ham bands. (In my case, this would be pretty useless, since I mostly work on radios that are AM FM CB or SWR.
Ideally, something that covered 1CPS to 110 MHZ would be best suited for my needs, but I cant find anything like that, at least not in the price range of $50 or less. (which is what I am willing to pay for something I wont get real much use from).
My antique Eico 320 Signal Gen only goes a little over 100 MHZ, so once again, the example URL I posted would not be real helpful.
So, I am pretty confused. What's better, an antenna or test leads?
Do they actually make and sell LOW PRICED Freq Counters that go from 1 CPS to 110 MHZ or so?
Then again, it almost appears that to get full coverage of all Frequencies, a person needs to buy TWO Freq counters, since UHF TV covers the 470 to 806 MHZ. But once again, what good is a Freq Counter with no test leads (just an antenna) for use on television?