[hpsdr] Intelligent or dumb Alex, food for thought...

[Hollingsworth, Tommy]

Henry:
I have a surge tester that will go to 25 KV.  I think a one to one
comparison test of the alternatives would be quite easy!  All approaches
would need to be installed on a standard (or the same) test fixture, then I
could test in 1 KV increments until the parts blow or the limit of the
tester is reached.  This way I can do direct comparisons without damaging a
radio.  

I personally like the TVS diodes from Semtech.  The threshold voltage can be
picked at whatever you want.  The latest parts have capacitance values as
low as 0.5 pF.   I really do not know what voltage threshold would be most
appropriate, but if someone else would be willing to test them in their
radio for distortion, I would be happy to obtain any desired Semtech parts
and do comparative testing with the surge tester to any desired
configurations.  I am really curious about how the different approaches will
stand up to calibrated abuse.

Tommy Hollingsworth currently KE5LFR 
 

-----Original Message-----
From: hpsdr-bounces at hpsdr.org [mailto:hpsdr-bounces at hpsdr.org] On Behalf Of
Henry Vredegoor
Sent: Wednesday, March 07, 2007 1:06 AM
To: hpsdr at hpsdr.org
Subject: Re: [hpsdr] Intelligent or dumb Alex, food for thought...

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

Hi all, Pieter,

You must be coming from the future.....

No problem with that kind of power, we will use a lightning strike each time
we want to adjust the frequency.

73's
Henry.

> 
> You must be taking about a reluctance tuned variable flux capacitor 
> filter.
> Those are typically tuned to 1.21 GHz and require way to much power 
> (1.21 GW).
> 
> :)

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