Re: Connecting my Elecraft K3 to a Drake L-7 amp.

Posted by Jim Wiley-2 on
URL: http://elecraft.85.s1.nabble.com/Connecting-my-Elecraft-K3-to-a-Drake-L-7-amp-tp7541893p7542919.html


The AGC connection is an OUTPUT from the amp to the transceiver, not an
input.


Its purpose is to lower the gain, and thus the power output from the
exciter when the amp is overdriven.


On the L4B / L7 series amplifiers, the way to set it to adjust the amp
for max output, then back of the AGC / ALC adjustment control until the
amp just begins to reduce power.  However, as several have said, it may
not be needed when driving the amp with a K3.   The operator can see in
an instant which way the control works by rotating it from one limit to
the other, and then adjusting it as per the first sentence of this
paragraph. .


Some on the air checking, as well as using a scope to monitor the
transmitted output waveform will help the operator determine whether or
not AGC / ALC is needed.


- Jim, KL7CC



hawley, charles j jr wrote:

> The AGC is an input for letting the transceiver control the output power of the L7 which you don't need if you adjust your transceiver to a low output suitable for driving the L7.
> The VOX is the keying control for the amp. Pull low (ground) to transmit.
>
>
> Chuck, KE9UW
> aka Jack, BMW Motorcycles BMWMOA #224
>
> ________________________________________
> From: [hidden email] [[hidden email]] on behalf of Jerry Dwyer [[hidden email]]
> Sent: Wednesday, May 09, 2012 12:55 AM
> To: [hidden email]
> Subject: [Elecraft] Connecting my Elecraft K3 to a Drake L-7 amp.
>
> I just got a good deal on a very clean Drake L-7 amp (2- 3-500Z tubes). I
> was hoping someone might know how to connect them together. The amp has the
> normal RF in and out connectors. It also has two rca connectors, one says
> VOX and the other says AGC.
>
>
>
> Thanks for any help
>
>
>
> Jerry - NF9L
>
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