[hpsdr] FW: Anie

Mon Mar 23 05:44:52 PDT 2009

Forgot to send to the list also......

-----Original Message-----
From: Henry Vredegoor [mailto:henry.vredegoor at gmail.com] 
Sent: maandag 23 maart 2009 13:00
To: 'Phil Harman'
Subject: RE: [hpsdr] Anie

Hi Phil,

Somebody mentioned a while back the preselector from Heros Technology in the
UK from an article in QEX.

Besides this "High-End" product for UK£ 475, 

http://www.herostechnology.co.uk/pages/SCR_Preselector.html

they also have a "budget" version for UK£ 75 as a kit

http://www.herostechnology.co.uk/pages/tiny_SCR_preselector.html

witch looks very similar to the preselector by HA5RXZ on your new Anie
webpage.

It is USB/software controlled so it could match a HPSDR/Mercury (remote-)
setup nicely.

Looks to me like a nice, affordable and doable DIY project.

(I have no connections with this firm whatsoever)

73's,
Henry.

 <http://www.herostechnology.co.uk/pages/tiny_SCR_preselector.html>  
 <http://www.herostechnology.co.uk/pages/tiny_SCR_preselector.html>  

-----Original Message-----
From: hpsdr-bounces at lists.hpsdr.org [mailto:hpsdr-bounces at lists.hpsdr.org]
On Behalf Of Phil Harman
Sent: maandag 23 maart 2009 11:59
To: carcia at sbcglobal.net; hpsdr at lists.hpsdr.org
Subject: Re: [hpsdr] Anie

Hi Frank,

Thanks for the feedback - I'll add your comments to the Wiki.

Phil....

----- Original Message ----- 
From: FRANCIS  <mailto:carcia at sbcglobal.net> CARCIA 
To: hpsdr at lists.hpsdr.org 
Sent: Monday, March 23, 2009 10:30 AM
Subject: [hpsdr] Anie

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

  _____  

Hi All,
I think a great interface for a preselector would be the DB25 on Ozy. We
could output 16 bits of 4 bit BCD to give 10 KHz resolution to tune a
preselector,  This would be the center frequency on the display. Phil, You
may remember the schematic I sent you of the Cubic pre-post selector. There
are a number of different mil versions by Collins and Harris to name two
others. The Cubic is set up to handle 1/2 watt of power and has a TR relay. 
This would also be a good interface for anyone who would want to build a
homebrew preselector. I was on the air a few nights ago and something in the
area saturated the Mercury A/D for the first time so I see a need for a
better preselector rather than a simple wideband filter. The Harris RF590
has a nice small tunable unit but I don't know the interface. A serial
string would also work but I think 10 KHz resolution should be enough.
I have used my Cubic pre-post selector in series with Mercury and find the
performance quite good. I would think this is the next step in improving a
beautiful receiver. 
Frank WA1GFZ

P.S. My friends have been sending my on air tapes of Penny with the comment
that I have never sounded better. 

  _____  

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