nope it has turned into the spanish channel,,, 9 went away really when truckers moved from 10 to 19 and that was because react and alert complained of bleed over,,, 11 used to be the calling channel 13 was rv/boating,, 16 was ssbSo no one actually uses channel 9 for emergency use anymore right?
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FM
- Thread starter WECSOG
- Start date
So no one actually uses channel 9 for emergency use anymore right?
Tijuana Taxi, si!
Ya. I think its a bad idea. Not that I think FM is bad but I think its going to divide an already small user base.
Legal radios will be ±2 kHz deviation. Arnt the current 10 meter radios all 5 at least? I looked in my LincII+ and saw nothing for narrow/wide.
Adding tone squelch could be fun though. Like the early days of 2 meters where guys had to wire in tone boards to get in to repeaters.
Coming from a country where FM was the only legal mode from 1981 to 2014 it's been mildly hilarious watching all the rubbish and scaremongering that's been going on since the announcement was made.
European CBs and "export radios" and 10 meter radios derived from "export radios" are typically narrow only, to fit in the 10 kHz channel spacing of the CB service. Emission designation something like 8K50F3E which means F3E FM phone modulation and an 8.50 kHz wide emission (about 2 kHz or 2.5 kHz deviation). Euro standard here:
https://www.etsi.org/deliver/etsi_en/300400_300499/300433/02.01.01_60/en_300433v020101p.pdf
Only "real" ham radios from YaeComWood and Part90 commercial radios have wide deviation setting. The modern ham radios typically have firmware that disables wide FM below 29 MHz. The Part90 radios will have wide(ish) deviation for the VHF-Lo band. Emission type 16K0F3E/20KF3E, or F3E FM phone modulation with 16 kHz or 20 kHz wide emission (about 4 kHz or 5 kHz deviation).
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Shadetree Mechanic
Delaware Base Station 808
So to get wide FM, do we just increase the deviation? Or is there more to it than that? I guess I need to learn FM now, I am sure people will come up with all kinds of mods for it.
a couple of nights ago our late night rag chew group went fm with all 3 of us using president hr 2510s,,, set auto squelch and had a fine business time on channel 19,,
It makes no sense to widen the FM deviation in the CB radio service where most receivers have a 10 kHz IF filter channel spacing. You would just modulate outside the IF filter passband of the person receiving your signal and the received power outside the 10 kHz channel is lost as heat in the IF filter components. Leave wideband FM (16 kHz or 20 kHz modulated bandwidth, 4 kHz or 5 kHz deviation setting) to the ham radios operating above 29 MHz, or to business band "VHF-Lo" Part90 radios that have the correct IF filters and discriminators in their receivers to do something useful with the wider deviation.
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First I have to ask WHY do you want to increase the deviation? Nothing good will come from. You will simply be louder and occupy a wider bandwidth splattering all the more and piss people off when they have to crank the volume down whenever you key up. Good Lord.......it has not even begun it's roll-out and already people want to start messing with the modulation.
Shadetree Mechanic
Delaware Base Station 808
Back in the early 80's when I got into SSB, LSB and USB were packed full of people every day between 36 and 40. People didn't hesitate to get on USB. In fact people outside of the US still use a lot of USB today.
Here in Seattle we have a dedicated group of SSBers every Saturday night at 7PM. The Puget Sound 11m SSB net meets on channel 40LSB and there is a net control! We get 40-50 people a week checkin in from all over Western Washington.