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Re: [Amps] Drake amplifier

Subject: Re: [Amps] Drake amplifier
Date: Mon, 23 Jul 2007 12:40:51 EDT
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In a message dated 7/23/2007 12:25:52 P.M. Eastern Daylight Time, writes:

But  methinks that Ep is on the low side.  I don't have an L-7, but  could
swear the L-4B Ep was more like 2.7 kV key-down...might be related to  line
voltage and which transformer tap you're  using.


In many instances the HV metering resistors change value in time and the HV  
readings are not that accurate.  I always use an outboard meter to test HV  on 
amps, which verifies the correct voltage I have and also checks to see if the 
 HV meter is reading accurate.  If the meter reads wrong compared to  the  
outboard meter, changing the metering resistors are in  order.  SOME amps have 
compensation pot that can vary the reading against  a "known" meter, but 
sometimes, if the metering resistors have badly changed  value even then it is 
hard adjust the meter for the right reading.   Lou

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