[hpsdr] Low gain low noise linear?

[Dick Faust]

Hi Todd
You might look at the driver stage G6ALU used for the Pic A Star 20 W 
amp [Output stage is similar to Pennywhistle].  Uses a pair of RD06HHF1

http://myweb.tiscali.co.uk/radiokits/radio-related/20W_PA/index.htm

Dick Faust K9IVB

Todd Mondragon wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
>   
>
> ------------------------------------------------------------------------
>
> Hi all,
>
> While I have been having absolutely no problems finding designs for 
> medium power (50W - 600W) wide band amplifiers there is a lack of 
> anything that can be used to bridge the gap from HPSDR output levels 
> to what is required for input on some of these designs.
>
> In my case I have been getting the parts together for a BLF177 300W 
> wide band linear as described in Phillips Application Note NCO8703 ( 
> http://www.nxp.com/acrobat_download/applicationnotes/NCO8703.pdf ). 
> This requires ~1.5W to drive at full power.
> While it will put out a respectable 100W at 500mW input the 3rd and 
> 5th order distortion products are a little higher than I would like at 
> that lowered power level.
>
> I know I can get a 5W amp then pad it down to do the trick, but this 
> really feels like a hack (and a waste of 5-10W of supply power)  to me 
> so I am looking to put together something that will give a nice clean 
> ~1db gain as an intermediate.
> I know, small order, but not so easy to fill. :)
>
> Any suggestions or pointers?
>
> 73,
> Todd M0GLO
> ------------------------------------------------------------------------
>
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at openhpsdr.org
> Subscription help: http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
> HPSDR web page: http://openhpsdr.org
> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/
> ------------------------------------------------------------------------
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 8.5.375 / Virus Database: 270.13.3/2217 - Release Date: 07/03/09 18:11:00
>
>   

 1246831412.0