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TinySA 3.5mm jack

 

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I don't want to force a standard 3.5mm 3 conductor jack all the way into my TinySA Ultra and take a change of breaking it. Has anyone tried using a two conductor jack and, if so, did it make the channel connections despite not being fully seated?
Thanks,?
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When the 3.5 mono jack is fully inserted, the jack groundline shorts the connector's R-channel with the connector's ground. Since R and L are internally linked in the #Ultra, the audio signal is grounded.
To be able to hear with a mono jack the solution is not to insert the jack completely
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Thanks for the quick response. Nothing to lose by trying so I'll give it a try and report back here. BTW, Nice drawings!


On Sat, Feb 1, 2025, 9:05?AM Toni Ciscar via <aciscar=[email protected]> wrote:
When the 3.5 mono jack is fully inserted, the jack groundline shorts the connector's R-channel with the connector's ground. Since R and L are internally linked in the #Ultra, the audio signal is grounded.
To be able to hear with a mono jack the solution is not to insert the jack completely
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I ended up opening the TinySA Ultra case and pinching a 3 conductor 90° male audio jack into the female socket between my thumb and forefinger to avoid putting pressure on the board. No damage was done, and the audio is working well.
 

The 3.5 Jack socket on these tinySA does seem to be a teeny bit small in diameter. The Jack plugs available also do vary in diameter. Try to find a plug which is not at all tight, or maybe take a fine file and carefully ?reduce the plug diameter until it slides in without much friction. If it is too tight you will likely break the surface mounted socket soldering. That happened to me and some others. HTH Peter
 

In the US, Switchcraft made a very popular line of 3.55 mm mono plugs and jacks that are still in production and are often found on older cables and equipment. They were frequently used for custom cables because they were easy to wire. They are not really compatible with modern stereo jacks and can sometimes do serious damage.
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They were more or less standard for many years as they were very high quality. premade molded cables from places like Radio Shack often were built to this dimension as a result.
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It's best to get rid of any old mono cables you have.
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Since they are still available, some folks unwittingly make new cables with them.
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M
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This is a also true with other devices that use surface mount jacks instead of through hole mounting. I would also recommend applying a little Deoxit D5 on the plug as a lubricatnt.

Mike N2MS

On 02/02/2025 8:57 AM EST Prawlin via groups.io <prawlin10@...> wrote:


The 3.5 Jack socket on these tinySA does seem to be a teeny bit small in diameter. The Jack plugs available also do vary in diameter. Try to find a plug which is not at all tight, or maybe take a fine file and carefully reduce the plug diameter until it slides in without much friction. If it is too tight you will likely break the surface mounted socket soldering. That happened to me and some others. HTH Peter

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