[Elecraft] K3 to Al-811 Amplifier

[George Pontiakos]

I drive my 811 with 35 watts…and push out around 450…..u can drive it higher to get the full 600, but I have found it wears out the tubes much faster…

My very best to all,

George KA3ZHX
On Dec 13, 2013, at 12:30 PM, Harold Fitzgerald <fitz6 at swbell.net> wrote:

> I used an AL-811H for many years with my K3. Coax connection and PTT is all
> that is needed. 
> 
> Some other things to think about:
> - Ameritron 811H only need about 60 watts or so to drive it. At the
> beginning, I ran about 100 watts into the amp, but after a few years I
> noticed that the finals had silvery spots on the grids. That's because I was
> over driving the amp and melted the them. Only use enough in to get the
> required out. 60 to 70 watts is plenty on that amp.
> 
> 
> Harold "Marty" Fitzgerald W5MF
> Fitz6 at swbell.net
> 
> 
> Not an AL-811, but I've used an AL-1200 with my K3. I used an RCA cable for
> amplifier keying and a PL-259 jumper for RF. 
> 
> I did not connect ALC, I instead adjusted the K3's power output as
> appropriate.
> 
> 73 de Dick, K6KR
> 
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of pastormg2 at verizon.net
> Sent: Friday, December 13, 2013 10:02 AM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] K3 to Al-811 Amplifier
> 
> Hi Guys, I would like to hook up my K3 to an Ameritron Al-811 Amplifier. I
> assume that I connect the K3 output to the Amplifier Input. An the Keying
> Cable that is in the back to the Relay Plug on the Al-811? I see an ALC
> Output and ALC Adjustment knob. But I probably don't need to use those. But
> then again I could be wrong. Has anyone used the AL-811 with the K3? Thanks
> in advance. Mark Griffin, KB3Z
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