[hpsdr] Penny Whistle Bias

[Graham / KE9H]

John:

I think you are fine.
You are plenty close enough.

The quiescent PA currents will walk around about 10 percent
with heatsink temperature.

--- Graham / KE9H

==

On 12/22/2012 6:07 PM, John wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
>
> Powed my TAPR Penny Whistle kit up today for the first time. According 
> to the manual the PA bias should be about 20 mA.  Mine is only 8.23 mA.
>
> Is that in the normal range or should I begin looking for an assembly 
> error?  Both R11 and R17 adjust, but it is hard to set them to an 
> exact balance.
>
> My readings are:
>   Bias   8.23 mA
>   R17 set (only)  456.1 mA
>   R11 set 905.4 mA
>
> 73,
>
> John  WoGN
>
>
>
> _______________________________________________
> 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/
>


 1356222321.0