[ARC5] Command Set Shaft Collar Nut

Wed Apr 12 13:44:37 EDT 2017

McMaster Carr has 1/2-27 taps for about $35.00

      From: Michael Hanz <aaf-radio-1 at aafradio.org>
 To: Leslie Smith <vk2bcu at operamail.com>; arc5 at mailman.qth.net 
 Sent: Wednesday, April 12, 2017 1:06 PM
 Subject: Re: [ARC5] Command Set Shaft Collar Nut

What about 
http://www.ebay.com.au/itm/1-2-x-27-uns-hss-plug-new-tap-/172586672791

It ships from Devon, but it appears to be free shipping to Australia.

On 4/12/2017 11:59 AM, Leslie Smith wrote:
>    Hello Bill,
>
>    I tried to buy a tapping tool for 1/2 inch 27 threads per inch from my
>    local bicycle shop, and also at the largest tool supplier
>    (Blackwoods).  Nothing.
>
>    73 de Les Smith
>    vk2bcu at operamail.com
>
> On Wed, Apr 12, 2017, at 22:40, Bill Cromwell wrote:
>> Hi Les,
>>
>> On this continent (and probably all continents) the generation that
>> designed those radios were much more familiar with bicycles than the
>> present generation(s). And in the days when those designers were growing
>> up and into their adult lives had a lot more hands-on experience with
>> everything in their lives. Most of the people using bicycles today pay
>> far too much for them and then can barely manage the simplest of
>> 'maintenance' - maybe washing and waxing and a drop of oil here and
>> there. Bicycle shops that I know about are always busy keeping this
>> generation's bicycle status symbols working. I'll stop in there and ask
>> about 1/2-27 parts.
>>
>> 73,
>>
>> Bill  KU8H
>>
>> On 04/11/2017 07:46 PM, Leslie Smith wrote:
>>>    Threads on "command" radio receivers.
>>>    I refer to the thread used between the tuning system and the receiver.
>>>    I measured the thread using a thread gauge.
>>>    I found the thread was 27 turns to the inch (and NOT 28 tpi)
>>>    Using Newnes Workshop Handbook I read that (1) the thread was 1/2
>>> inch cycle thread
>>>    (2) this thread was considered to resist "unwinding" due to vibration.
>>>
>>>    That's all I know.
>>>    Except I thought it was very clever to use a thread that resisted
>>> working free in equipment subject to vibration.
>>>    How did those radio guys know about bicycle threads?  Hmmm?
>>>
>>>    73 de Les Smith
>>>    vk2bcu at operamail.com
>>>
>>>
>>>
>>> On Wed, Apr 12, 2017, at 08:17, Phillip Carpenter wrote:
>>>> Mike,
>>>>
>>>> I was reading that website posting but it was unclear if the ARC-5
>>>> receivers had the same thread. It looked like he was talking about
>>>> ARB receivers.
>>>>
>>>> Phillip W4RTX
>>>>
>>>> Sent from my iPhone
>>>>
>>>> On Apr 11, 2017, at 5:39 PM, Michael Hanz <aaf-radio-1 at aafradio.org
>>>> <mailto:aaf-radio-1 at aafradio.org>> wrote:
>>>>> See http://aafradio.org/garajmahal/flex_drive_cables.html for all
>>>>> that stuff.  The tuning shaft collar is a straight 1/2"-27TPI thread
>>>>> (_not_ a tapered pipe thread).
>>>>>
>>>>> 73,
>>>>> Mike
>>>>>
>>>>>
>>>>> On 4/11/2017 5:26 PM, Phillip Carpenter wrote:
>>>>>> Does anyone know what thread size and type of through-hole nut fits the shaft collar on the Command Set receivers?
>>>>>>
>>>>>> I know it's smaller than a 3/8" NPT compression nut.
>>>>>>
>>>>>> Thank you in advance to all who reply!
>>>>>>
>>>>>> Respectfully,
>>>>>>
>>>>>> Phillip W4RTX
>>>>>>
>>>>>> Sent from my iPhone
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>>>
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>> -- 
>> bark less - wag more
>>
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