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[AMPS] Noises in electrolytic capacitors

To: <>
Subject: [AMPS] Noises in electrolytic capacitors
From: (2)
Date: Sat, 29 Sep 2001 10:44:41 -0700
>2 (Rich) wrote:
>> //  I do not have a manual.  please quote Mr, Rauch's reasonable
>> statements.
>Actually, I found the AL80B manual on the Ameritron web site
>(  Here is an excerpt from the tune-up discussion. 
>Although the 400 MA figure is not mentioned (but see below), it's clear 
>that the
>intent is to tune up for peak conditions and then reduce the drive for CW.
>"Increase the exciter drive power (if the ALC is not connected) until 180 
>mA of
>grid current is indicated. Adjust the "LOAD" and "PLATE" controls for 
>maximum RF
>output power. The grid current should not be allowed to go above 200 mA at 
>stage. The plate current should not be allowed to exceed 600 milliamperes 
>brief periods of tuning (15 seconds)."
>"For CW operation, the output power should be reduced with the "ALC SET" 
>until the rated output power of 800 watts is obtained. The "LOAD" control 
>be adjusted until minimum plate current is obtained without dropping below 
>watts. The exciter's power can be reduced until the multimeter shows a slight
>upward flicker with the "MULTIMETER" switch in the ALC position if the ALC is
>"For SSB operation, the "ALC SET" should be adjusted to allow 200 mA of grid
>current (near the 20 volt marking). The exciter should be set to produce 
>output power (not to exceed 100 watts of peak power). 

//  Eimac rates the typ. drive at 65w for 400mA of anode-I.

> Next the amplifier's
>"LOAD" and "PLATE" controls are adjusted for maximum power output on the
>internal peak reading RF wattmeter with either a two-tone generator or 
>"HEL-L-L-L-L-O" driving the exciter. The "ALC SET" control should then be
>reduced until the peak power output is slightly lowered. Finally the 
>audio gain or output power is adjusted until the multimeter "ALC" position
>indicates the desired ALC level. This setting should normally allow around 
>mA grid current on a steady carrier or "whistle"."
>Finally, from the discussion of the ALC Set adjustment:
>"The "LOAD" control setting determines the maximum plate current and output
>power for a given grid current. Never exceed 600 mA of short duty cycle 

//  Incredible chutzpah.   It is no surprise to me that Mr. Rauch has not 
yet published the alleged Eimac letter authorizing such.  

>(or 400
>mA of long duty cycle) plate current. Never exceed 200 mA of operating grid

//  As I figure it, 200mA is c. 17w.  Eimac's and Amperex's grid-diss 
rating is 20w.  , 
cheers, Vic, 

-  R. L. Measures, 805.386.3734, AG6K,  

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