[hpsdr] ET and PS

[Phil Harman]

Hi Helmet,

Congratulations on your successes with Envelope Tracking – great progress.  Just one small correction, the PWM frequency from Hermes is 240kHz.

I wonder if you are considering a direct-off-the-mains PWM so that a high current, low voltage supply,  is not needed prior to the PWM ?

I think this would enable a very small and lightweight QRO linear to be built. 

Good luck for your further work in this interesting area.

73 Phil...VK6PH 


From: Helmut Oeller 
Sent: Saturday, October 4, 2014 3:42 PM
To: hpsdr at lists.openhpsdr.org 
Subject: [hpsdr] ET and PS

***** High Performance Software Defined Radio Discussion List *****




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Hi,

Envelope tracking (ET) is an advanced method to boost efficiency of linear amplifiers. Many thanks to Phil, VK6PH, and Warren, NR0V, who made the access to the envelope information on Hermes and the necessary baseband processing in PowerSDR possible.

More details about the current project status at http://www.hamsdr.com/dnld.aspx   

73, Helmut, DC6NY

 



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