I am considering simplifying my shack a little. I have an SB-200 currently not in use and was thinking of trying to drive it with my Argonaut for those times when I need the power (Air Force MARS). D
Bob You should be abl to drive the SB200 to aout 300-500 watts with 20 watts drive. The problem is that the V doesn't have an AL output. Ron K3MIYC I am considering simplifying my shack a little. I h
The problem is that the V doesn't have an AL output. Neither does the Orion. And you'll need a RF sensing switch to put the amp into transmit mode. k4ia Craig "Buck" Fredericksburg, Virginia USA ____
Hi, On this subject, has anyone used a Heil dual switch to do this? Thanks, Vince Santis, N1VS Winsted, CT 06098 _______________________________________________ TenTec mailing list TenTec@contesting.
Thank you Craig and the others for responding. So the RF sensing switch takes the place of a keying control output that apparently does not exist in the Argo V? Is that what the AL output is? Have ne
Most amps have two jacks on the back besides RF input and output: a relay jack to control B+ voltage and T/R switching, that is normally controlled from the exciter (transceiver), and an ALC output j
Bob The ALC biases the RF to avoid clipping. In an amplifier, the exciter ALC is applied as a bias to avoid the same thing. The Argo does not provide ALC to an amp. If the amp can create an internal
I have an idle SB-200 here so I ran some tests to see what 20 watts drive would do. Found several interesting and maybe discouraging things. Forget about ALC. 20 watts will not drive the amp to anywh
Author: "Geoffrey S. Mendelson" <gsm@mendelson.com>
Date: Wed, 11 Oct 2006 00:56:50 +0200
.... I'm out of the U.S. so I am not sure, but I thought that in the last year the FCC dropped the rules about HF amps that killed the 5 watt in amplifiers like the TenTec 405. I've seen discussions
Thanks to all. It was just a thought and there are better ways to go I think. I appreciated the education about amplifiers. 73, Bob W4ZY _______________________________________________ TenTec mailing
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 10 Oct 2006 17:17:43 -0600
The rules I downloaded in August still require 50 watts drive. And some were pure class C planning on the AM carrier for any bias towards linearity. Most were severe splatter and harmonic creators. W
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 10 Oct 2006 17:25:31 -0600
I think you might find better efficiency if the amplifier was tuned with normal drive levels and those tuning capacitor positions were used for the low drive condition. At least for the loading. As f
I thought of doing that but the question was how the SB-200 would work with the Argonaut V. Since it has only 20 watts max available, one cannot tune with any higher drive level. Before I put the amp
Bob- I am going to suggest you look closely at selling the SB-200, and looking at an SGC-500 Power Cube ampplifier, if it is in your budget. I just ran mine at 20W input, and received 340W OUT on my
Hi Lee That works! Ron K3MIY I thought of doing that but the question was how the SB-200 would work with the Argonaut V. Since it has only 20 watts max available, one cannot tune with any higher driv
OK, let me eat a little crow and try the numbers again. :-) Seems there are two peaks, on 40 meters anyway, and of course I got the wrong one first time around. The load control is now near max CCW.
Wow! I've misunderstood this for years. I thought the the ALC voltage was produced by the amplifier, and fed to the exciter to limit drive. I never knew that the exciter generated an ALC voltage to c
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 11 Oct 2006 10:37:18 -0600
News to me. Maybe Breune, Pappenfous and Shoenike got it all wrong in their tome on SSB 45 years ago.... Generally one does never change the bias in the PA (though we did modulate the grid bias in th
Jerry Thanks for setting me straight. The process is a bit confusing, as I never saw a diagram that showed the path of the ALC process. I think I have it straight, and my apologies for putting my mis