[Boatanchors] somewhat off topic (switch ID)

[D C *Mac* Macdonald]

Not truly a DPTT.  That would indicate three separate
destinations for the 2 signals/voltages being switched.
 
I believe that DPDT/Center Off is the correct description
for the item to which you are referring.

73 - Mac, K2GKK/5
(Since 30 Nov 53)
Oklahoma City, OK








> From: kf4nsradio at verizon.net
> To: jpl15 at panix.com
> Date: Fri, 2 Apr 2010 19:02:58 -0400
> CC: boatanchors at mailman.qth.net
> Subject: Re: [Boatanchors] somewhat off topic (switch ID)
> 
> Wow, what a strange way to describe a switch. Way back in 
> radio/electronics school in the early '60s I seem to remember that 
> this switch was called a DPTT (triple throw).
> 
> Ok, that makes sense John.
> 
> Thanks and 73, Dick KF4NS
> St Petersburg, FL 33714 USA
> Keep The Glow!
> 
> ----- Original Message ----- 
> From: "John Lawson" <jpl15 at panix.com>
> To: "Dick KF4NS" <kf4nsradio at verizon.net>
> Cc: <boatanchors at mailman.qth.net>
> Sent: Thursday, April 01, 2010 6:24 PM
> Subject: Re: [Boatanchors] somewhat off topic (switch ID)
> 
> 
>>
>>
>> On Thu, 1 Apr 2010, Dick KF4NS wrote:
>>
>>>
>>> ON-NONE-ON
>>
>>
>> The switch has two mechanical positions - will not stay in the 
>> 'center'
>>
>>
>>
>>>
>>> ON-OFF-ON
>>
>>
>> The switch has three mechanical positions, either extreme of 
>> travel and center. Used where one of two circuits need to be 
>> switched "either-or" or both "off".
>>
>>
>>>
>>> What is the difference in the last two? They are different listed 
>>> part
>>> numbers for the same type switch.
>>>
>>
>>
>> The momentary types of course are spring-loaded to either return 
>> to center [wasn't that an Elvis tune?] or to return to one of the 
>> two positions.
>>
>>
>> Cheers
>>
>> John KB6SCO
>>
>> 
> 
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