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: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net] on > behalf of Jerry Dwyer [jdw...@ptsnetwork.com] > Sent: Wednesday, May 09, 2012 12:55 AM > To: elecraft@mailman.qth.net > 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 > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
