[hpsdr] PennyWhistle

Bob Cowdery bob at bobcowdery.plus.com
Tue Jul 14 04:56:01 PDT 2015


Thanks, made me check all the transformers. Looks like I had a senior 
moment and forgot to solder the primary of T3! All working now.

Bob G3UKB

On 13/07/2015 18:31, Graham / KE9H wrote:
> Bob:
>
> Most likely, something is wrong with T2.
>
> It is shorted or something, or open at the center tap.
>
> I would remove it, inspect, and rewind if necessary.
>
> --- Graham / KE9H
>
> ==
>
> On Mon, Jul 13, 2015 at 11:48 AM, Bob Cowdery <bob at bobcowdery.plus.com 
> <mailto:bob at bobcowdery.plus.com>> wrote:
>
>     ***** High Performance Software Defined Radio Discussion List *****
>
>     Hi all,
>
>     Finally got around to building my PennyWhistle which has been
>     sitting on the shelf for a few years. The build looks clean. All
>     the pre-operation setup went fine and the bias is set correctly.
>     The SWR on the input is as specified.
>     However, when I apply drive from Penny there is no output and the
>     current consumption actually decreases from its 950mA (no drive
>     setting) to 600 and lower as the drive is increased.
>
>     Any hints on where to start looking appreciated.
>
>     73 Bob (G3UKB)
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