[Elecraft] AL-811H Amp and K3

[NZ0T]

Yes, that's all there is to it.

Allan Bacon-3 wrote:
> 
> To confirm what I think you are saying here is?
> 
> RCA plug on a wire from the K3 KEY OUT (RCA/Phono) to the RELAY RCA on the
> Amp ?
> 
> Thus keying the K3, also keys the amp?
> 
> 73,
> Al
> W6GBG
> 
> 
> ----- Original Message ----
> From: NZ0T <NZ0T at cox.net>
> To: elecraft at mailman.qth.net
> Sent: Monday, October 13, 2008 8:50:40 AM
> Subject: Re: [Elecraft] AL-811H Amp and K3
> 
> 
> David,
> 
> I run the Al-811 (3 tubes otherwise the same as the 811H) with my K3 and
> interface is very easy.  There is no need to use ALC just adjust the K3
> power output so you are not overdriving the amp.  With my setup that's
> around 60- 70 watts out.  You just need a simple cable with RCA plugs as
> the
> keying line and you are good to go.
> 
> GL and 73,
> 
> Buill NZ0T
> 
> 
> David Wilburn wrote:
>> 
>> I will be picking up an AL-811H soon.  I was first licensed in 2001 
>> and I have never had an amp.  The 811 requires a 15ms delay, and I 
>> noticed that the firmware now supports up to a 20ms delay, so I should 
>> be good there.
>> 
>> The 811 documentation talks quite a bit about the use of ALC, and the 
>> K3 documentation talks quite a bit about NOT using ALC.  I'm not sure 
>> where to go with this.  Anyone using a K3 with an 811?  Do I need to 
>> use ALC with it?
>> 
>> I am trying to get everything ready for the upcoming contests, so 
>> timing is becoming an issue.
>> 
>> The current manual says to see the website to see if you need the mod 
>> kit.  The website says to see the mod kit manual, to see if you need 
>> to the mod kit.  The manual does not say anything about how to 
>> determine if you need the mod kit, so I assume that if -12v ALC is 
>> needed, the mod needs to be done.  Is this correct?
>> 
>> I do not see any mention in the K3 documentation about connecting to 
>> amps. It looks like the key out is used to key the amp.  The manual 
>> says up to 200v DC @ 5A.  The 811 documentation only mentions 12v, and 
>> gets grounded for keying the amp.  Do I need any other devices inline 
>> for keying the amp?
>> -- 
>> 
>> David Wilburn
>> NM4M
>> http://www.nm4m.com
>> K2 - S/N 5982
>> K3 - S/N 766
>> Latest Firmware
>> 
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> 
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