I suppose it would have had to have been the '30's and those were tough times.
On Feb 24, 2014, at 3:14 PM, Brian Carling wrote:
> 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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