[GreenKeys] The Metric System (was Independence Day

Tue Jul 4 15:40:14 EDT 2017

At least ISO is a common standard. There are/were,  at least two other 
thread standards used in England- Whitworth and BA or British Association.
  The BA was very common on electrical and electronic gear and 
motorbikes. It is metric but the thread shape is incompable with ISO, I 
found out about this when I began to restore a couple Eddystone receivers.

      Bruce Gentry  KA2IVY

On 7/4/17 2:34 PM, Lester Veenstra wrote:
> Stocked up on Metric from McMaster. Use them exclusively for new work, and
> since most parts and electronics are imported, am ready there. I hear a
> whiff of "Not invented here" behind the negative talk on metric.  Now they
> did follow the suggestion on paper sizes where  each is is X2 the previous.
>
> Lester B Veenstra  K1YCM  MØYCM  W8YCM   6Y6Y
> lester at veenstras.com
>
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> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net
> [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of info at drukknop.nl
> Sent: Tuesday, July 04, 2017 12:50 PM
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] The Metric System (was Independence Day
>
> No problems here with metric here. its the strange inch type (erratically
> called imperial) that i find confusing. no idea how to read my calipers in
> inch scale. threads are too coarse, head too big and then 15/32? c'mon, you
> can't be serious.
>
> And imagine that you didn't used decimal system in currency. the British
> were one of the last to change to decimal counting in that.
>
> ;)
>
> (not to mention factories inventing their own threads and sizes for
> protection reasons...
>
> simon)
>
> On 04-07-17 07:12, WA5CAB--- via GreenKeys wrote:
>> It was probably invented by French and/or Germans but as far as
>> perfecting it, unh unh! Just take the ISO Metric threaded fastener
>> system. Worst real-world threaded fastener system ever devised. Thread
>> pitch is too fine. Hex nuts and hex cap screw heads are too small.
>> Screw heads are too small. Screw slots are too narrow. The system is
>> only usable in (a) a Clean Room or (b) a "total consumer" economy
>> where when something stops working instead of fixing it, it goes to a
>> land fill and a new one (that usually doesn't work as well as the old
>> one) has to be bought.
>>
>> Inconveniently sized basic units is another built-in bad feature. In
>> many cases, you have to use a million of them or a millionth of one of
>> them to get to the "real world".
>>
>> Robert Downs - Houston
>> wa5cab dot com (Web Store)
>> MVPA 9480
>>
>> In a message dated 07/03/2017 23:32:31 PM Central Daylight Time,
>> hwhall at compuserve.com writes:
>>> You know that those weird measures came to us via England, before she
>>> swooned over a measurement system invented &perfected by French
>>> &Germans, right? :-D
>>>
>>>
>>> Wayne
>>> WB4OGM
>>>
>>>
>>
>>
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> --
> Met vriendelijke Groet,
>
> Simon Claessen
> drukknop.nl
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