[Elecraft] Line Out Jack

[iain macdonnell - N6ML]

On Tue, Apr 8, 2014 at 9:56 AM, Josh Fiden <josh at voodoolab.com> wrote:
> My recollection is that 3.5mm and 1/8" have always been used
> interchangeably. I believe (guess) the discrepancy is simply that the plug
> originated as 3.5mm and 1/8" is the closest fractional inch (9/64 is
> unsatisfying).

Wikipedia (which knows everything, right?) seems to concur...

http://en.wikipedia.org/wiki/Phone_connector_(audio)

73,

    ~iain / N6ML




On Tue, Apr 8, 2014 at 9:56 AM, Josh Fiden <josh at voodoolab.com> wrote:
> I'm curious about this. If anyone has reference to an actual 1/8" connector,
> please forward off list. I don't recall them ever being anything but 3.5mm.
> My recollection is that 3.5mm and 1/8" have always been used
> interchangeably. I believe (guess) the discrepancy is simply that the plug
> originated as 3.5mm and 1/8" is the closest fractional inch (9/64 is
> unsatisfying).
>
> Checking specifications from one reputable manufacturer calls out sleeve
> diameter of 3.5+/-0.05mm for the plug and 3.6mm for the entrance of the
> jack. As with so many things, I'm sure there's no difficulty finding poorly
> designed/manufactured Asian parts that deviate.
>
> There's no such issue with 1/4" phone connectors. They are called out either
> as 6.35mm or 6.3mm, which is quite accurate because they originated as the
> fractional inch dimension.
>
> 73,
> Josh W6XU
>
>
> On 4/7/2014 7:11 PM, Don Wilhelm wrote:
>>
>> 3.5mm and 1/8 inch are now the same thing - one place calls them 3.5mm
>> while others use the 1/8 inch designation for the same thing.
>>
>> Yes, it was not always so, but that was well before stereo plugs and jacks
>> came into existence.
>> The big issue now is manufacturing tolerances that might mean some jack
>> and plug combinations are tight while other combinations may appear to be
>> sloppy.
>>
>> 1/4 inch plugs and jacks are more tolerant of sloppy tolerances i.e +/-
>> 0.01 mm compared to 3.5mm is much greater than +/- 0.01 mm compared to 7 mm
>> (or is it 8mm?).