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Re: [Amps] Transformers

To: Gudguyham@aol.com
Subject: Re: [Amps] Transformers
From: R L Measures <r@somis.org>
Date: Sun, 16 Jul 2006 09:46:40 -0700
List-post: <mailto:amps@contesting.com>
Lou --  A question.  I measured 400v-pk into 49.9-ohms @ 7MHz with a  
SB-220.  How many PEP W is this?
On Jul 16, 2006, at 8:28 AM, Gudguyham@aol.com wrote:

> In a message dated 7/16/2006 9:57:42 A.M. Eastern Standard Time,  
> r@somis.org writes:
>> There has been a lot of discussion over the years, especially in  
>> the early days when one did not have a PEP reading watt meter.   
>> So, the rule of thumb "at the time" was that PEP was ~ twice the  
>> average DC input.  SO...What don't you see?
>
> That the rule of thumb is accurate.
>
> Granted it is NOT a direct 2 to 1 ratio, but at the time "for all  
> practical purposes" it seemed the be an accepted approximation.  
> Short of sophisticated electronic equipment to accurately measure  
> PEP power the "rule of thumb" seemed to be acceptable to many.  We  
> have to remember the vintage of the SB-220 and the "mind set" of  
> PEP vs. DC input at the time.\Lou

R L MEASURES, AG6K. 805-386-3734
r@somis.org



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