That's the last thing we "need" -- more bogus regulations that can't possibly be enforced without a dedicated staff that 99.99% of the taxpayers I'm sure don't want to pay for. Besides, if they don't
Banning DSB full carrier AM sounds like a good idea to me. If someone wants "AM compatibility" ISB with reduced carrier will do the job just fine. There is no justification for a bandwidth greater th
While the discussion of ITU regulations and spectrum mask is interesting, international and sovereign regulations is a bit "off topic" for an amps list. 73, ... Administrator amps@contesting.com ____
The market could take of the enforcement, Joe. Add the spectral mask to the part 97, and then overlay the mask on the ARRL product test report IMD plots. You can bet your bottom dollar that this woul
Really Joe?? So how many rigs do you have with an "ISB" button? None of mine do. It does however have an AM button, as well as 4k+ (at -6dB) of SSB right out of the box. With 4k of audio, phonetics a
Okay, so how is that tested? White noise? Tones? Voice? Max power? Max allowed ALC? No ALC? Come on Michael, there's no way that would be anything but arbitrary, as a lot of the ARRL's "measurements"
Hi Rich, Fortunately, farsighted tube designers included the heater/filament to circumvent this likelyhood. Take a look at the RCA article. It shows how it's done. It does take a total of 9 variable
*There* are the keys: it is NOT a linear amplifier and it is NOT easily QSYd. And while we are at it, the modulator itself does not enter into the picture. RCA correctly claimed 90% (or better) effi
Modern radios will only do 4K+ of SSB if you bypass the if filter which is generally 2.7 to 3.0 KHz wide at the - 6dB point or use outboard equalization techniques to "make up" for the losses on both
You mean the way it *USED* to be (DC input)??? --SNIP-- However, if the FCC should happen to change the rules so that "power" is measured at the AC cord, then we might be a mite more circumspect as t
Hi Joe, Nope, actually at the line cord so that all power consumed counts! Just use an in line AC wattmeter. That might actually encourage some experimentation. 73, Marv WC6W http://wc6w.50webs.com/
There are *NO* hardware mods to the transmit section of my rig (TS-950SDX) whatsoever. It will allow me to select its 6k IF filter for TX, and the 4k BW is SW limited in the DSP. If I had an external
ooooo... "AC Input". That would be interesting... Joe Hi Joe, Nope, actually at the line cord so that all power consumed counts! Just use an in line AC wattmeter. That might actually encourage some e
Okay, so how is that tested? White noise? Tones? Voice? Max power? Max allowed ALC? No ALC? Come on Michael, there's no way that would be anything but arbitrary, as a lot of the ARRL's "measurements"
Part 97.307(A): No amateur station transmission shall occupy more bandwidth than necessary for the information rate and emission type being transmitted, in accordance with good amateur practice. Wit
I've been following the thread and have an observation which I haven't seen anyone else mention. Most professional linears (or up-market amateur units) have a rated rf output the same as the anode di
Part 97.307(A): No amateur station transmission shall occupy more bandwidth than necessary for the information rate and emission type being transmitted, in accordance with good amateur practice. Wit
White noise is definitely worst-case, and with max allowed ALC it makes an ugly spectral plot. However, I'm not sure what you mean by "white noise with a peak-to-average ratio typical of voice...". W
Better read the rules again, Joe. Nowhere do they specify 3 kHz as "necessary BW", therefore *YOU* have chosen that value. Go read FCC Part 2, Subpart A, subparagraph 2.1 which *does* specify necessa
I was hoping that this discussion wasn't going to morph into one about regulatory bandwidth but... With all due respect Joe, even Hollingsworth concedes the ambiguity of 97.307(a). I believe he has