Re: Variable power control


Gordon Gibby <ggibby@...>
 

​Thanks -- great info.  3db insertionloss.  



From: BITX20@groups.io <BITX20@groups.io> on behalf of Karl Heinz Kremer, K5KHK <khk@...>
Sent: Thursday, February 22, 2018 9:34 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Variable power control
 
There is an HP application note about PIN diode attenuators: http://www.hp.woodshot.com/hprfhelp/4_downld/lit/diodelit/an1048.pdf

I was just about to recommend a PIN diode attenuator as well. The device used in this particular configuration reached it's end of life, and may be hard to get soon. There are alternatives: 

https://www.nxp.com/docs/en/data-sheet/BAP70Q.pdf

The data sheet has a chart that shows insertion loss based on frequency and control voltage. 
--
Karl Heinz - K5KHK

Join BITX20@groups.io to automatically receive all group messages.