[hpsdr] Hermes J16 right speaker polarity

[Sid Boyce]

If I am not too late, please include me.
73 ... Sid.

On 02/08/13 17:50, John Ackermann N8UR wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> 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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-- 
Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
Senior Staff Specialist, Cricket Coach
Microsoft Windows Free Zone - Linux used for all Computing Tasks


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