[Boatanchors] AM Amplifier

[Dennis DuVall]

First time I’ve jumped into these discussions for several years. Big mistake. Won’t do it again.

Dennis DuVall, W7QHO

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> On Jul 7, 2018, at 7:19 PM, D C _Mac_ Macdonald <k2gkk at hotmail.com> wrote:
> 
> Yep, that is true, of course, but a bit beyond legally allowed.
> 
> Mac
> K2GKK in OKC
> From: Dennis DuVall <duvallddennis at gmail.com>
> Sent: Saturday, July 7, 2018 21:11
> To: D C _Mac_ Macdonald
> Cc: Dale Smith; BOATANCHORS2 LIST
> Subject: Re: [Boatanchors] AM Amplifier
>  
> Yes, everybody knows that but continuing on:  At 1600 watts peak out (4 X 400 W.carrier) and at a class B efficiency of 50% my 3-1000z is 
> dissipating 800 watts on voice peaks with a 100% modulated A M driving signal, well within the tube’s ratings.  
> 
> That’s all I said.
> 
> DD W7QHO
> 
>> On Jul 7, 2018, at 6:19 PM, D C _Mac_ Macdonald <k2gkk at hotmail.com <mailto:k2gkk at hotmail.com>> wrote:
>> 
>> Theoretical Peak Envelope Power for a clean, 100% modulated AM signal is FOUR times the carrier power.
>>  
>> 73 de Mac, K2GKK/5​
>> (Since 30 Nov '53)​
>> Oklahoma City, OK​
>> USAF Retired 61-81​
>> FAA Retired 94-10
>> 
>> From: boatanchors-bounces at mailman.qth.net <mailto:boatanchors-bounces at mailman.qth.net> <boatanchors-bounces at mailman.qth.net <mailto:boatanchors-bounces at mailman.qth.net>> on behalf of Dennis DuVall <duvallddennis at gmail.com <mailto:duvallddennis at gmail.com>>
>> Sent: Saturday, July 7, 2018 18:47
>> To: Dale Smith
>> Cc: BOATANCHORS2 LIST
>> Subject: Re: [Boatanchors] AM Amplifier
>>  
>> 
>> > On Jul 7, 2018, at 3:54 PM, Dale Smith <ka5who at gmail.com <mailto:ka5who at gmail.com>> wrote:
>> > 
>> > Lets see 450 watts times 4 =1600 watts,what is wrong with this picture.
>> 
>> 
>> OK, just what IS wrong with this picture?  I run 400 watts AM carrier regularly with my military T-368.
>> With the linear’s I do the same.  The amplifiers are running class B at an efficiency of 50% and thus dissipating
>> 400 watts during carrier only and 800 watts on voice peaks both which values are well within he ratings of 
>> a 3-1000Z.  Also please note that in my home-brew unit I’m still running the same tube I originally installed 
>> almost 30 years ago.
>> 
>> Dennis DuVall   W7QHO  --   ex DA1IN, G5BSW, WA3YXN
>> Glendale,CA