[hpsdr] PennyWhistle Connection Diagram

[Phil Harman]

I’ll fix the documentation and release  a new version. 

73 Phil...VK6APH 



From: John Westmoreland 
Sent: Wednesday, March 07, 2012 6:25 AM
To: n3evl 
Cc: hpsdr at lists.openhpsdr.org 
Subject: Re: [hpsdr] PennyWhistle Connection Diagram

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--------------------------------------------------------------------------------
Pete, 

My amp got pretty hot during this process - I am wondering now if anything is damaged.  

This obviously needs to be fixed - in the documentation.  Maybe we need to have an errata section where we accumulate these sort of items so no one else has to experience it.  Got out my infrared gun and was measuring temps in the 120 degrees Fahrenheit range while the amp was just sitting there - so I knew something was wrong.  

73's,
John
AJ6BC


On Tue, Mar 6, 2012 at 2:21 PM, n3evl <n3evl at townisp.com> wrote:

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  John,

  I think you are correct. Below is my e-mail from 11/21/2009.  I was under the impression that the documentation had been changed to correct the inconsistency back then but apparently not.

  Pete, N3EVL

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  The connection diagram on page 5 of the Pennywhistle Assembly and Operating Instructions document shows the 3-pin header numbers with 1 labeled as Bias Control and 2 labeled as ground. 
  This appears to be at odds with the schematic which shows 1 ground and 2 Bias Control. 

  Since tests with my ohm meter agree with the schematic, it appears that the connection diagram is incorrect. 

  The last thing I have to do is wire up the control cable to this header and the DB25 - want to make sure I have it correct. 

  Pete, N3EVL 
  __________________"





  On 3/6/2012 4:24 PM, John Westmoreland wrote: 
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    (resend without the diagram attached)

    HPSDR,

    I did a search of e-mail that I have - not exhaustive by any means - but has anyone noticed that the Bias Control and Ground Pin numbers are reversed in the below diagram?  (please see PennyWhistle connection diagram in the pdf on the web-site)

    I wondered why my amp was starting to heat up when it wasn't doing anything.

    73's,
    John
    AJ6BC


     

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