[Elecraft] K3 on AM with AL811H amplifier

[Joe Subich, W4TV]

> Don´t know how much the AL80B can handle
> but 1600W PEP sounds to be too much.

The AL-80B is a single 3-500Z.  It is capable of 800W peak if 
it is to remain clean and should not be run at more than 500 W 
CW.  40W carrier from the K3 and 400W carrier from the AL-80B 
are, in both cases, grossly out of spec. 

The K3 should not be run at more than 25W of carrier (28W absolute 
max) and the AL-80B (or any single 3-500Z) should not be pushed to 
more than 200W carrier (absolute maximum).  

73, 

   ... Joe, W4TV 
  



> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Jan Erik Holm
> Sent: Sunday, February 21, 2010 6:29 AM
> To: Hector Padron
> Cc: AMFMTV at aol.com; elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K3 on AM with AL811H amplifier
> 
> 
> That will come out to 160W PEP on the K3 and 1600W PEP
> on the amp. I would not set the K3 to more then 25W
> (i e 100W PEP). Don´t know how much the AL80B can handle
> but 1600W PEP sounds to be too much.
> 
> / Jim
> ----------------------
> Hector Padron wrote:
> > Good morning Ted,let me tell you something,since the very 
> first day I 
> > got my K3 serial 2192 I have been using it on AM on 40M 
> with guys who 
> > work on 7180,I use it with my AL-80B,when I key up the K3 
> puts out 40W and that makes 400W out of the amp and when I 
> talk it swings up  to 1KW,the TX modulation percentage its 
> about 90 to 95% and the reports from the old timers using 
> vintage radios is great always,some guys says look that I am 
> using a big boat anchor AM station,in fact there was a guy 
> who loved it so much that he was asking which company made 
> the K3 because he wanted to have one. Without a doubt a K3 is 
> an all mode perfect radio to own,73
> >  
> > AD4C
> >  
> > 
> > 
> > "For a refined ham it is compulsory to own a k3"
> > 
> > --- On Sun, 2/21/10, AMFMTV at aol.com <AMFMTV at aol.com> wrote:
> > 
> > 
> > From: AMFMTV at aol.com <AMFMTV at aol.com>
> > Subject: [Elecraft] K3 on AM with AL811H amplifier
> > To: Elecraft at mailman.qth.net
> > Date: Sunday, February 21, 2010, 3:27 AM
> > 
> > 
> > Just thought you'd all like to know that I have been getting GREAT 
> > AUDIO
> > reports from running K3 #1717 on AM, into an AL811H 
> amplifier driving the amp 
> > to  about 125 watts carrier.  Connecting the K3 to the amp 
> was as simple as 
> > plugging in the relay cable and the coax.
> > 
> > Running AM and using the sync detection on AM surpasses even my old 
> > boat
> > anchor AM receivers.  For me, the K3 is the true all purpose radio.
> > 
> > 73
> > Ted W8IXY
> 
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