And maybe they were too busy fighting a war to play radio.
Best regards - Bry Carling
> On Feb 24, 2014, at 6:03 PM, k6jek <k6jek@comcast.net> wrote:
>
> We're cruising toward the 100 year anniversary of SSB. It definitely
> qualifies as older technology.
>
> It was the famous John Carson patent for SSB filed in 1915 that used the
> antenna circuit for more than just radiating. He suppressed the carrier with
> a balanced modulator but sliced off the opposite sideband in the antenna
> coupler. That's a higher Q tuner than your average MFJ.
>
> I've never understood why it took so long for amateurs to pick up SSB. AT&T
> had it in commercial service in 1927. A couple of guys did stuff in the
> '30's. But not until the Stanford experiments in 1947 and the QST articles
> the next year did it really start to take off. Maybe it took cheaper and
> better components that came out of WWII to make it practical for hams. Or
> maybe it was just wasn't interesting to them.
>
>
>> On Feb 24, 2014, at 1:08 PM, k6jek wrote:
>>
>> There is a lot to be said for an antenna as a resonant circuit. One of the
>> very early SSB patents did just that. They sliced off the carrier and
>> opposite sideband at the antenna. Now if I can just remember who that was.
>> I bet one of you can
>>
>>
>>> On Feb 24, 2014, at 12:42 PM, Ron Notarius W3WN wrote:
>>>
>>> Loomis was a quack. I'd rather hang out with Reginald Fessenden
>>>
>>>
>>> On 02/24/14, Rick - DJ0IP / NJ0IP wrote:
>>>
>>> Doug, I think you've been hanging out with Mahlon Loomas too long!
>>>
>>>
>>>
>>> And for those of you who can't remember who he was, it might be worth your
>>> while to look it up.
>>>
>>>
>>>
>>> I bet most of you didn't even know that wireless communications was invented
>>> by a DENTIST!
>>>
>>>
>>>
>>> Yes, he also invented the very first Aerial, although some might argue it
>>> was Benjamin Franklin.
>>>
>>> Franklin only used the kite wire to capture electricity; Loomas used it as
>>> an Aerial to send and receive signals.
>>>
>>> http://en.wikipedia.org/wiki/Mahlon_Loomis
>>>
>>>
>>>
>>> Though his patent for a wireless telegraph was in 1872, as I recall he
>>> discovered this about 4 years earlier. Hard to remember exactly. I was
>>> just a young whipper snapper back then.
>>>
>>>
>>>
>>> So guys, take it from me; next time you're having problems with your
>>> antenna, don't ask an engineer, consult your dentist!
>>>
>>> Hey, I oughta know... I work for an antenna company!
>>>
>>> ;-)
>>>
>>>
>>>
>>> What does all of this have to do with Doug's comment?
>>>
>>> Everything.
>>>
>>> Mahlon discovered that if he made the length of the wire of the TX and RX
>>> aerial the exact same length, communications was much more reliable. Thus
>>> you might conclude that the length of wire was determining the frequency.
>>>
>>>
>>>
>>> But that's not quite accurate.
>>>
>>> Actually it was transmitting on (almost) all frequencies, but only
>>> efficiently radiating into the ether on the wavelength associated with the
>>> length of his aerial. So specifically, the aerial, not the transmitter,
>>> determined the frequency being radiated into the distant ether. In the near
>>> field, a broad frequency spectrum was being radiated.
>>>
>>>
>>>
>>> ... at least that's my understanding of what was happening.
>>>
>>> Then again, how would I know?
>>>
>>> I'm neither an engineer nor a dentist!
>>>
>>>
>>>
>>> 73 - Rick, DJ0IP
>>>
>>> (Nr. Frankfurt am Main)
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Doug Reid
>>> Back when I started out, we used a spark generator and the frequency was
>>> determined by the length of our antenna......
>>>
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