[hpsdr] Hermes J16 right speaker polarity

[John Ackermann N8UR]

I didn't realize my question would generate so much discussion! :-)  I 
can easily see how the pinout could have been done in a non-standard 
way, so my main concern is just making sure that we have it documented 
properly.

Due to my compulsive nature (cf time-nuts) I thought it would be good 
for both speakers to be phased the same and that's what really triggered 
my question.  It's worth reiterating the warning that you can't tie 
either speaker output to ground or Bad Things will happen -- on the left 
speaker jack, the signals are on tip and ring with sleeve disconnected 
and I'm following that plan for the right speaker as well.

FWIW, my project isn't using a ribbon cable at all.  I'm building a 
small PCB with a 26 pin right-angle PCB mount connector (non-keyed) that 
will plug directly into J16.  So, I just need to know which physical pin 
provides which signal, and don't need to worry about the numbering 
scheme per se.

My plan is for the other end of the PCB to have six 3.5mm stereo jacks 
to provide all the audio I/Os as well as the PTT and key-out signals 
(using SMT jacks on both top and bottom of the board, I can fit them 
into about the same width as J16).  I'm also including pads for the 
open-collector outputs so you can mount a 10 pin header or solder wires 
directly to them.

I'm not planning to turn this into a product, but if folks are 
interested in joining a one-time PCB purchase, let me know off-line and 
maybe we can make that work.  I'm hoping to ship the board layout to the 
fab in the next week or so.

73,
John
----

On 8/1/2013 9:40 PM, Dick Faust wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> I should point out that when I did the 1.7 version of the HERMES manual
> in October of 2012 this was clarified and  has not changed through the
> latest revisions of the manual.  If anyone cares to look back on the
> reflector this condition was explained too many times to enumerate in
> one post !!!
>
> The way the board was designed was the way the board was designed and
> anyone saying it is wrong is wrong themselves.  Just because the
> numbering does not conform to your opinion of what is correct does not
> make the make the pin numbering wrong .
>
> Just flip the cable over and run it out to a breakout board that has the
> pins numbered as you would like or use a magic marker to renumber the
> pins.  The connector was not designed to go on the underside of the
> board - go read the reflector.
>
> Dick K9IVB
>
> George Byrkit wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Thanks to Ken K9VV for pointing out Bill Diaz' work, and the error in
>> the Hermes manual!
>>
>> It would seem that someone, when laying out the board, may have
>> thought that J16 would go
>> on the other side of the board?  I think that would have resulted in
>> the Hermes docs being
>> right.  Instead, the picture on pg 13 of the V 1.17 Hermes manual from
>> the OpenHPSDR
>> website does indeed misnumber the pins of J16 as far as standard
>> numbering should go.  The
>> pin seen on the far right as pin 25 should indeed be pin 2.  This
>> means that the Hermes
>> docs have the pin numbering in the wrong direction, and swapped
>> between the upper and
>> lower rows.
>>
>> I think that we need another version of the Hermes OpenHPSDR manual
>> with this correction
>> made.
>>
>> For those interested, incorrectly-numbered pin 15 (really pin 12) is
>> 'phase +' and pin 14
>> (really pin 13) is 'phase -' for the right channel.  The correct pin
>> numbers for those
>> used to proper Berg connector (IDC 2x13) numbering, pin 15 is really
>> pin 12.
>>
>> 73,
>> George K9TRV
>>
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