CB Radio - AM vs. FM vs. SSB comparison
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- Опубликовано: 18 авг 2021
- CB Radio - AM vs. FM vs. SSB comparison. S3 signal and S7 signal on AM, then FM, then SSB. Looks like to use FM you really need about an S7 or stronger signal to be usable. AM you can go a little lower and SSB.... way lower. Hear the difference. Comments and video suggestions are appreciated.
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I Think SSB will always be king especially for DX but I'm also running FM here. Great video 👍 . U can see my FM reports to compare. 73s 640 AM The Mix
I didn't know Kenwood made a cb
You guy's are lucky, we were only allowed 2w on am (no ssb, no amps and only wip aerials) in the 70's tho could still occasionally do skip, yes using am ( 3,000 mls).
I like the idea of this video, but I think there's a fatal flaw/misunderstanding:
Good AM transceivers back then did require powerful AF stages to properly modulate the AM signal.
A shiny modern ham transceiver doesn't cut it, because it's intended for SSB/CW these days.
Its AF amps are tiny and not meant to heavily drive another RF stage.
Even FM is just an extra, intended for repeater use in the 10m band or transverter use.
A classic ham radio, say, a Yaesu FT-101, will make a powerful AM signal.
That was one of the most popular "CB radios" in the 1970s, by the way. ;)
Unfortunately, many CBers (and hams) did kill/fry the good old' 101 because they
didn't unterstand that 100W AM are not the same as 100W SSB. :(
To make a proper comparison, please do include CB radios from the AM era (1950s-1970s/early 1980s) next time.
You know, these boxes with ~12 to 23 channels, quarz crystals or 7-segment displays/PLL.
- These radios do proper AM. Same goes for the early AM/SSB radios (or AM/FM radios in EU)..
PS: I didn't mean to sound unfriendly in any way, it's not your fault also.
Many people don't know of the 'art' of operating amplitude modulation anymore.
The popular Yaesu FT-817, for example, has a horrible AM signal, too.
FM is better in many ways
I know exactly what you mean, I did CBing in the 70's when we only had 2w & 9ch and could still do skip from NZ to Australia using AM because we weren't allowed any SSB, no amps & no hi gain ant like yargi's etc.
Long winded, know it all speech-- Found.
@davidrichter9164 To use old school stuff was an art, like many big 70's cars required a certain technique to get the best out of them that most people of today have no clue about
@@VicGreenBitcoin it's only good for short range or emergency situations Tru CBing is in the the 26/27 mhz range
The stronger station needed a better mic or some speech processing. With that signal level should have had better intelligibility.
No mud ducks here
Worse!!!🤣🤣🤣
FM certainly much better than AM but you appear to have a serious noise issue at your location so probably not a fair test.
Filters are too wide on the 480, he should use a HT filter on FM. FM S Meter on most amateur radios are quite useless, not accurate at all.
FM forever! LOL
FYI this was an incorrect use of QSY.
Haha i think you are right but there is no Q code for changing modes is there?
@@Z28videogates I've banned using Q codes from my vernacular unless there's a language or signal barrier. These guys who say "QSL?" instead of "Over" Arghhhhhh!
Single Sideband, upper or lower is merely the "most efficient" mode when it comes to power use; even low power you can still TX a good distance when atmospheric conditions are low or bad (lousy) whereas the other modes require more output power one way or the other. The only way to "enhance" single sideband is to use good quality microphones and maybe audio equalizers.
KD8EFQ/73
SSB rules.. (Well CW but that's another argument for another day)
Yeh, but everybody sounds like mickey mouse
@@VicGreenBitcoin then you're not tuning the receive correctly.
Its very unusual to hear static noise on a 60db signal FM , you must have a serious noise issue .
The S-meter is completely inaccurate on this Kenwood.
QSY is change frequency not change mode
Sounds like poor modulation hub and there is far to much scrap on FM, which is probably generated by power line adapters.
This Kenwood has a very wide FM filter, the remote station has a maximum of 2KHz deviation, hence so much noise.
CB has a maximum deviation of +-2.2KHz, the filters have a width of +-3KHz, this Kenwood +-7.5KHz
If all the radios ate ham radios the don't have much modulation on am so won't be able hear them that good anyway
Squech adjust that FM lol. That's rough listening with out