[hpsdr] ALEX - Call for comments - Protection devices.

[Henry Vredegoor]

Hi All, Alberto,

Sorry for the "switch".....
I was a little bit in a hurry and just hit "Reply" which inserts the address
of the originator in the "To" field automatically and edited the result by
adding hpsdr at the "Cc" field. (Outlook)


The 3rd response "diodes with resistors to the supply lines" supposedly
would be better in this respect.
The resistors would reduce the hard clipping effects which cause IM products
in the front end.



73

Henry.



> -----Original Message-----
> From: hpsdr-bounces at hpsdr.org 
> [mailto:hpsdr-bounces at hpsdr.org] On Behalf Of Alberto I2PHD
> Sent: dinsdag 6 maart 2007 15:26
> To: hpsdr at hpsdr.org
> Subject: Re: [hpsdr] ALEX - Call for comments - Protection devices.
> 
> 
> ***** High Performance Software Defined Radio Discussion List *****
> 
> > Quick search, subject: "Front End Protection"
> > 
> > 1. Good old NE2(A1A) Neon Bulb
> > 2. Two diodes antiparalel 
> 
> The JRC NRD-525 receiver used two anti-paralleled diodes as a 
> mean of input protection, but the common advice on its 
> Yahoo discussion group was to remove them as soon as 
> possible, as they can generate IMD products in presence of strong 
> BC stations. I suppose the same holds for two LEDs in anti-parallel.
> 
> 73  Alberto  I2PHD
> 
> P.S. When replying to this group, the To: field is set to the 
> sender of the message being replied to, instead of the 
> group address. Is this done intentionally ? Wouldn't it be 
> more useful to change it the other way ? Usually what one 
> wants to do is to reply to the group, not to the original poster.
> 
> 
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