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Allen Fulmer
Joined: 10 Jan 2006
Posts: 79
Location: Alexander City, AL
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 Posted: Thu Jul 03, 2008 7:17 pm Post subject: Problem with 2-70 substitute? |
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Bob,
This is a snippet from a May 12th list message:
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A miniature version of the 2-70 is a C&K 7215SYZQ available
from Digikey at:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=CKN1134-N
D
Wiring for this switch is illustrated at:
http://www.aeroelectric.com/Pictures/Schematics/3-Ch_Voltmeter.pdf
Bob . . .
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When you follow that link for the CKN1134-ND you get C&K 7215SYZQE (note the
trailing "E") which I ordered from Allied Electronics but it does not appear
to be a "progressive transfer" type of switch.
A May 18th post of yours has the following link:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=CKN1495-ND
which is a different switch, a 7215TZQE. I hate to order that one if it is
not correct but I can't make out how to tell which one might be "progressive
transfer".
Of course, it could just be that I don't know how to wire it. I have your
drawing titled "3 Ch Progressive Transfer Voltmeter Selector Switch" dated
5/12/08 Rev.A.
Thanks,
Allen Fulmer
RV7 Wiring/Plumbing
Eggenfellner Subaru E6T on firewall
N808AF reserved
Alexander City, AL
256-329-2001
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RV7 QB Fuselage
Eggenfellner H6 on orde
N808AF reserved
Alexander City, AL |
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nuckolls.bob(at)cox.net
Guest
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| Posted: Thu Jul 03, 2008 8:52 pm Post subject: Problem with 2-70 substitute? |
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At 10:14 PM 7/3/2008 -0500, you wrote:
Hmmmm . . . according to the Digikey catalog excerpt at:
http://www.aeroelectric.com/Mfgr_Data/Switches/CKN1134-7215SYZQE.pdf
and CK catalog exerpt at:
http://www.aeroelectric.com/Mfgr_Data/Switches/7000_18june.pdf
the 7215 is indeed a progressive transfer switch. The trailing
E means epoxy seal. The magic numbers are 7215 which is momentary
both extremes (2-70), 7213 which is momentary one extreme (2-50),
and 7211 with no momentary positions (2-10). Note the asterisk
on all part numbers of this series referring to supplementary
wiring data to make it a 3-way switch. Note also the terminal
connection data also highlighted that describes the typical
progressive transfer functionality.
If the switch you got from Allied is a 7215, then some work
with an ohmmeter should confirm or deny the functionality
highlighted on the second page of the CK catalog excerpt.
Bob . . .
This is also a 7215 but with a different handle.
| Quote: | Of course, it could just be that I don't know how to wire it. I have your
drawing titled "3 Ch Progressive Transfer Voltmeter Selector Switch" dated
5/12/08 Rev.A.
|
Hmmm . . . on page 9 of
http://www.aeroelectric.com/articles/Switch_Ratings.pdf
I show two conventions for switch numbering between Carling
and Microswitch. I see that C&K has yet another convention.
In the mid position we need connections between 1-2, 5-6 to
match the AEC drawings. So, swap the columns. Looking in the
back of the switch and keyway up, treat it as if it were a
Carling switch numbered as shown in left view and it should
work.
Bob . . .
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Allen Fulmer
Joined: 10 Jan 2006
Posts: 79
Location: Alexander City, AL
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| Posted: Fri Jul 04, 2008 7:53 am Post subject: Problem with 2-70 substitute? |
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Looking at like it was a Carling worked! Thanks, Bob.
[quote]>>--
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_________________
RV7 QB Fuselage
Eggenfellner H6 on orde
N808AF reserved
Alexander City, AL |
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