[hpsdr] Question About Pennywhistle. Finally correct.

[Dan Babcock]

Franck,

For T2 use the three holes that are inside the small silk screened rectangular area on the PCB.  Solder together leads B' and A.  Put the resulting single lead into the center hole.  The two holes outside the rectangle are not used.  They are for an optional feedback winding.  The schematic is slightly confusing because it shows the optional connection of a feedback winding to C8 and C15. 

The output attenuation only at 15M is strange.  There is a window in the PowerSDR console that allows the Penelope PA settings to be adjusted in software for each band.  From the Main Menu in PowerSDR it is accessed by clicking on Setup.  The settings are then displayed by clicking on the "PA Settings" Tab.

I am going to put my response back on the reflector to see if anyone else can offer an additional suggestion.

73,

Dan N4XWE




________________________________
From: Franck <dub.fr at free.fr>
To: Dan Babcock <n4xwe at yahoo.com>
Sent: Thu, June 17, 2010 4:07:11 AM
Subject: RE: Question About Pennywhistle.   Finally correct.

 
Dan,
Ok no problem, but for the larger diameter wire for T2, only in
a center,  it’s  impossible to put  across pcb, because hole is  small.
See attached file, yellow circle on picture.
So I think it isn’t important, my big problem is on 15
meter band, the power is 4 W for 29dBm to the input, and I don’t understand
why?
Best 73 Franck F1SSF
 
De :Dan Babcock
[mailto:n4xwe at yahoo.com] 
Envoyé : jeudi 17 juin 2010 10:44
À : Franck
Objet : Re: Question About Pennywhistle. Finally correct.
 
Franck,

I will eventually get this right.

The line should be:

1)  Use the small diameter wire in the kit for the windings in the center
tap transformer (T1).  The large diameter wire is used for the windings in
the autotransformer (T2)

The -302 core is smaller than the -202 core

T1 = small core, smaller diameter wire.  T2 = large core, larger diameter
wire.  

73, Dan N4XWE


      
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