[hpsdr] PennyWhistle Connection Diagram

[Graham / KE9H]

John & All:

The parts are rated for operation up to heat sink temperatures of 80 
degrees C,
so a heat sink temperature of 120 degrees F or about 50 degrees C is not
a damage issue.

I will work with Phil to get the manual revised this weekend.

Are there any other errors or changes needed to the PennyWhistle
manual, as long as we are going to release a new revision?

--- Graham / KE9H

==


On 3/6/2012 4:25 PM, John Westmoreland wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
> 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 
> <mailto:n3evl at townisp.com>> wrote:
>
>     ***** High Performance Software Defined Radio Discussion List *****
>
>
>     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
>
>     "...***** High Performance Software Defined Radio Discussion List
>     *****
>
>     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:
>>     ***** High Performance Software Defined Radio Discussion List *****
>>
>>
>>
>>     (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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