[linrad] Re: Fwd: [softrock40] Ver 7 28Mhz preamp? Yes

[w3sz <comcast.net; w3sz@xxxxxxxxxxxxxxxx>]

This looks very nice, Gian!

As an inexpensive and easy-to-obtain choice, I have used the LNA module,  
set up for 28 MHz,  from the R2Pro by KK7B.  It is available from Kanga  
Kits.

http://www.bright.net/~kanga/kanga/KK7B/r2pro.htm here in the USA.

It is only $12.

I have a couple of them in use at my shack in front of my RF-to-baseband  
converters [not SoftRocks yet...they should arrive soon] for a couple of  
years and they seem to work well also.

THanks for the excellent tip, and

73,

Roger
W3SZ




On Mon, 01 May 2006 04:24:36 -0400, Giancarlo Moda <i7swx@xxxxxxxxx> wrote:

> Hi all,
>
> the preamplifier at 28MHz is required when the VHF-SHF
> converter has a low gain and its output is designed
> for a higher gain IF like the one used in Linrad HDW
> or others.
>
> I would suggest to add the W7AAZ preamplifier using
> 4xJfet in parallel, as used in the CDG2000 and
> Pic-A-STAR. This preamplifier has a very low noise
> (expected below 2dB)and another important aspect: The
> output impedance changes are no reflected to the input
> like for the Norton amplifier. It also has a high IIP3
> (>+35dBm).
>
> You may visit: http://www.warc.org.uk/ and look for
> the CDG2000 project.
>
> 73
>
> Gian
> I7SWX
>
>
>
>
> --- w3sz <w3sz@xxxxxxxxxxx> wrote:
>
> > Hi, All,
> >
> > Just a note for those interested in using the
> > SoftRock v7.0 as a backend
> > for transverters, forwarded from the Yahoo Softrock
> > group.
> >
> > Unfortunately, he didn't provide details on what his
> > system actually was.
> > But it is still some information ;)
> >
> > As always, ymmv.
> >
> > I hope to start receiving my SoftRocks late this
> > week or early next week,
> > and then should have some reports for all.
> >
> > 73,
> >
> > Roger
> > W3SZ
> >
> > ------- Forwarded message -------
> > From: pxxxxxxxxis <bxxxx@xxxxxxx>
> > To: softrock40@xxxxxxxxxxxxxxxx
> > Subject: [softrock40] Ver 7 28Mhz preamp? Yes
> > Date: Sun, 30 Apr 2006 19:07:48 -0400
> >
> >     This morning I was using the Ver7 with my
> > 28/144Mhz receive
> > converter for a receive IF on 10Ghz rain scatter. I
> > tried the system
> > WITHOUT the 28Mhz preamp I have been using. I could
> > see nothing but a
> > few spikes in the 96Khz range. Added the 28Mhz
> > preamp again and the
> > 9-10db 10Ghz rainscatter signal from W0GHZ was easly
> > seen. .... 28Mhz
> > preamp REQUIRED for my system!
> >
> > Yahoo! Groups Links
> >
> > --
> > Roger Rehr
> > W3SZ
> > http://www.nitehawk.com/w3sz/
> #############################################################
> > This message is sent to you because you are
> > subscribed to
> >   the mailing list <linrad@xxxxxxxxxxxxxxxxxxxxx>.
> > To unsubscribe, E-mail to:
> > <linrad-off@xxxxxxxxxxxxxxxxxxxxx>
> > To switch to the DIGEST mode, E-mail to
> > <linrad-digest@xxxxxxxxxxxxxxxxxxxxx>
> > To switch to the INDEX mode, E-mail to
> > <linrad-index@xxxxxxxxxxxxxxxxxxxxx>
> > Send administrative queries to
> > <linrad-request@xxxxxxxxxxxxxxxxxxxxx>
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com



--
Roger Rehr
W3SZ
http://www.nitehawk.com/w3sz/

#############################################################
This message is sent to you because you are subscribed to
 the mailing list <linrad@xxxxxxxxxxxxxxxxxxxxx>.
To unsubscribe, E-mail to: <linrad-off@xxxxxxxxxxxxxxxxxxxxx>
To switch to the DIGEST mode, E-mail to <linrad-digest@xxxxxxxxxxxxxxxxxxxxx>
To switch to the INDEX mode, E-mail to <linrad-index@xxxxxxxxxxxxxxxxxxxxx>
Send administrative queries to  <linrad-request@xxxxxxxxxxxxxxxxxxxxx>


LINRADDARNIL