[Elecraft] [K3] Speaker Plug

[Don Wilhelm]

Yes, I think you have missed the meaning of "nominal"
Let me put it this way - the "nominal 40 meter band" can refer to any 
frequency between 7.000 and 7.200 MHz (we in the US will extend that to 
7.300 MHz).

Likewise, nominal 3.5mm can range from 0.125 to 0.140 inches, and a 
"nominal 1/8 inch" can refer to the same range.
We do not live in an "exact" world, every physical thing has tolerances.
Ask a machinist to build you something without tolerance specifications, 
and he will tell you that it cannot be done.  How tight the tolerances 
can be held to is a sign of the quality of the product.  Those parts 
with tighter tolerances cost more.  That is why 1% resistors cost more 
than 5% resistors.

73,
Don W3FPR

On 1/2/2012 11:36 PM, Jim Wiley wrote:
> Hmmm -
>
> 3.5 mm = 0.1378 inches
>
> 1/8 inch = 0.125 inch
>
> Or am I missing something?
>
>
> - Jim, KL7CC
>
>
>
> Don Wilhelm wrote:
>> Tom and all,
>>
>> You are ignoring one important word - "Nominal"
>> A nominal 1/8 inch is equal to a nominal 3.5mm.
>> As far as I know, they are both the same size.
>> But as Jim Brown points out, there are good and bad connectors.  Buy the
>> good ones and stop suffering -- yes, that may mean that you have to
>> build your own cables if you want good performance.
>>
>>