[Elecraft] [KPA1500] Input Power

David Woolley forums at david-woolley.me.uk
Fri May 12 09:16:54 EDT 2017


Using a pad would be bad design, as simply increasing the level of 
negative feedback would help reduce distortion.  The only way one could 
achieve a repeatable gain close to 15dB would be with negative feedback.

Moreover, I assume it is an FCC condition that modification by the end 
not be easy.  You can assume that CB users wanting to use illegal powers 
have access to soldering irons.

Also, I would assume that the design gain is actually less than 15dB, to 
allow for component tolerances.

-- 
David Woolley K2 06123

On 12/05/17 02:43, Dr. William J. Schmidt wrote:
> All of those popular devices have gain more than 15 dB... so there is a pad in the amp to keep the gain at 15 dB. One would think that a "tweak" will evolve to modify the pad (and possibly the firmware) to eliminate this bothersome limit.



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