[Amps] S/S Amp's

[Mark Bitterlich]

Actually I quite enjoyed his comments.

Mark
WA3JPY

p.s.  And speaking of trivia ......... KM1H expires in 21 days.   The 
license I mean, not the person.  :-)


----- Original Message ----- 
From: "Carl" <km1h at jeremy.mv.com>
To: "Fuqua, Bill L" <wlfuqu00 at uky.edu>; "Joe Subich, W4TV" 
<lists at subich.com>; <amps at contesting.com>
Sent: Friday, September 13, 2013 8:31 PM
Subject: Re: [Amps] S/S Amp's


> Thanks for the prehistoric trivia lesson (-;
>
> I was referring to vacuum tube technology where AM was at least 
> understandable to some degree of quality.
>
> Carl
> KM1H
>
>
> ----- Original Message ----- 
> From: "Fuqua, Bill L" <wlfuqu00 at uky.edu>
> To: "Carl" <km1h at jeremy.mv.com>; "Joe Subich, W4TV" <lists at subich.com>; 
> <amps at contesting.com>
> Sent: Friday, September 13, 2013 1:05 PM
> Subject: RE: [Amps] S/S Amp's
>
>
>  What became known as Exalted AM was really a technique that was used
> back in the later spark era days once they developed nearly CW sources.
> In fact that is where the term local oscillator and BFO came from. They 
> discovered
> if an oscillator near the frequency you were receiving was coupling into 
> the diode detector,
> you not only had a beat tone but the sensitivity increased over 100 times 
> sometimes up to
> 500 times. This was because the detector was being over driven to 
> saturation during have
> of the oscillator cycle and was behaving as a RF switch. It was performing 
> more as a
> product detector rather than a square law detector. In fact Marconi 
> Patented the first
> balanced product detector in 1916. It used a buzzer and high Q tank 
> circuit for the BFO or
> Local Oscillator. Local oscillator means an oscillator near the detector.
>  By the way, another interesting fact, unrelated, Hertz discovered the 
> photo electric effect
> before 1900.
>
> 73
> Bill wa4lav
>
> ________________________________________
> From: Carl [km1h at jeremy.mv.com]
> Sent: Thursday, September 12, 2013 9:49 PM
> To: Fuqua, Bill L; Joe Subich, W4TV; amps at contesting.com
> Subject: Re: [Amps] S/S Amp's
>
> By using the Exalted AM method that goes back 70 years you dont need a 
> fancy
> radio.
>
> Modify the BFO for variable injection level and connect to the last IF
> thereby maintaining AGC. Its almost as good as a sync detector for 
> selective
> fading and its easier to follow a slightly drifting carrier.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Fuqua, Bill L" <wlfuqu00 at uky.edu>
> To: "Joe Subich, W4TV" <lists at subich.com>; <amps at contesting.com>
> Sent: Thursday, September 12, 2013 4:14 PM
> Subject: Re: [Amps] S/S Amp's
>
>
>>  Most hams today can't tune SSB clearly.
>> AM always sounds right. Perhaps we should have SSB reduced carrier rather
>> than
>> suppressed carrier. Another point, DSB occupies same bandwidth as AM.
>>  You could receive DSB or AM by detecting, using bfo and SSB filter, 
>> only
>> one sideband but with the loss
>> of 3dB signal to noise ratio compared to receiving it with synchronous
>> detector.
>> 73
>> Bill wa4lav
>>
>> ________________________________________
>> From: Amps [amps-bounces at contesting.com] on behalf of Joe Subich, W4TV
>> [lists at subich.com]
>> Sent: Thursday, September 12, 2013 2:29 PM
>> To: amps at contesting.com
>> Subject: Re: [Amps] S/S Amp's
>>
>> For the same reason they spam other bands with ESSB, IM products,
>> keyclicks, splatter and/or full carrier AM - because they can and
>> the rules against stupidity, and bad operating practices either do
>> not exist or are not enforced.
>>
>>
>> 73,
>>
>>    ... Joe, W4TV
>>
>>
>> On 9/12/2013 12:14 PM, qrv at kd4e.com wrote:
>>> Why are Hams still rf-spamming 160 & 80m with AM carriers
>>> when a DSB suppressed-carrier signal is just as good, uses
>>> less power, and may be sync-detected to remove flutter, etc?
>>>
>>> I know, I know, ... never mind ... sigh.
>>>
>>>> Jim said;
>>>>
>>>> "It sure would be nice to just rectify the 120vac from the wall plug,
>>>> with
>>>> or without any isolation xfmr"
>>>>
>>>> It's already in production.
>>>>
>>>> Not quite what you're after but... <http://www.k7dyy.com/>
>>>> http://www.k7dyy.com/
>>>>
>>>> David G4ZOW
>>>
>>>
>>>
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>
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