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Hobbs meter?

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Richard Pike

Joined: 09 Jan 2006
Posts: 1669
Location: Blountville, Tennessee

Posted: Fri Feb 24, 2017 2:55 pm Post subject: Hobbs meter?

Not planning any electrical system for the Firefly, but would like to hook up a Hobbs meter. We already have one that came with the wreck that shows the actual time of the 447, and our current panel has a cutout for it. 

But I do not know how to make it work w/o a 12V system. Anybody know how?



Here's a couple pictures - engine is on the mounts, piddling with the panel. Pictures are not that great.  At least they are not too big...

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_________________
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0

Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing.

Herbgh(at)nctc.com
Guest

Posted: Fri Feb 24, 2017 3:09 pm Post subject: Hobbs meter?

Hey Richard...



   Looking super!!  Mig or tig?   Herb

On 02/24/2017 04:55 PM, Richard Pike wrote:

 	  Quote: 	
		   



 Not planning any electrical system for the Firefly, but would like to hook up a Hobbs meter. We already have one that came with the wreck that shows the actual time of the 447, and our current panel has a cutout for it.

 But I do not know how to make it work w/o a 12V system. Anybody know how?



 Here's a couple pictures - engine is on the mounts, piddling with the panel. Pictures are not that great.  At least they are not too big...



 --------

 Richard Pike

 Kolb MKIII N420P (420ldPoops)

 Kingsport, TN 3TN0



 Forgiving is tough. Being forgiven is wonderful.





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=466606#466606





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-- 

"Masculine republics give way to feminine democracies, and feminine democracies give way to tyranny."



Aristotle

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Fri Feb 24, 2017 3:18 pm Post subject: Hobbs meter?

If it is an actual Hobbs Hour Meter it should be good for 112 to 60 vdc.



john h

mkIII

Titus, Alabama





--

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Fri Feb 24, 2017 3:29 pm Post subject: Hobbs meter?

Had a typo in my last msg.



Should have read 12-60vdc.



john



--

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

George Alexander

Joined: 10 Jan 2006
Posts: 245
Location: SW Florida

Posted: Fri Feb 24, 2017 4:01 pm Post subject: Re: Hobbs meter?

 	  Richard Pike wrote: 	
		  (SNIP)Not planning any electrical system for the Firefly, but would like to hook up a Hobbs meter. (SNIP)



But I do not know how to make it work w/o a 12V system. Anybody know how?

	




Richard:

Can't remember the size/value, but I had a setup like you want using a small diode/rectifier (from Radio Shack) and picked up the lighting coil.  Like John Hauck said, the Hobbs doesn't require a precise voltage level or pure DC.



Worth what you paid for it as always....

_________________
George Alexander
FS II R503
E-LSA N709FS
http://www.oh2fly.net

byoungplumbing(at)gmail.c
Guest

Posted: Fri Feb 24, 2017 4:10 pm Post subject: Hobbs meter?

Look for a battery powered Timer 

 Boyd

  

On Feb 24, 2017 3:57 PM, "Richard Pike" <thegreybaron(at)charter.net (thegreybaron(at)charter.net)> wrote: 	  Quote: 	
		  --> Kolb-List message posted by: "Richard Pike" <thegreybaron(at)charter.net (thegreybaron(at)charter.net)>

 

 Not planning any electrical system for the Firefly, but would like to hook up a Hobbs meter. We already have one that came with the wreck that shows the actual time of the 447, and our current panel has a cutout for it.

 But I do not know how to make it work w/o a 12V system. Anybody know how?

 

 Here's a couple pictures - engine is on the mounts, piddling with the panel. Pictures are not that great.  At least they are not too big...

 

 --------

 Richard Pike

 Kolb MKIII N420P (420ldPoops)

 Kingsport, TN 3TN0

 

 Forgiving is tough. Being forgiven is wonderful.

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=466606#466606

 

 

 

 

 Attachments:

 

 http://forums.matronics.com//files/p1050711_medium_436.jpg

 http://forums.matronics.com//files/p1050710_medium_195.jpg

 

 

 

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Richard Pike

Joined: 09 Jan 2006
Posts: 1669
Location: Blountville, Tennessee

Posted: Fri Feb 24, 2017 6:07 pm Post subject: Re: Hobbs meter?

Neglected to mention in the original post that this is the original 1985 model 447 that came with a new (1985) Firestar back in the day, so it has the single points ignition/lighting coil/charging coil.

Also - since the earlier post, started cutting apart the original wiring harness and discovered a diode with obvious connectors that would hook up to the Hobbs/hour meter. I am guessing I would attach those to the charging coil rather than the lighting coil, because all I want is the pulse, and not a lot of voltage. Also, I assume that if I hook it up to the hour meter and nothing happens, since it is a diode, all I need to do is swap the connectors?

Thanks for all the help so far!



And PS to Herb: Oxy/Acetylene. Old School FTW.

_________________
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0

Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing.

ceengland7(at)gmail.com
Guest

Posted: Fri Feb 24, 2017 6:39 pm Post subject: Hobbs meter?

On 2/24/2017 8:07 PM, Richard Pike wrote:

 	  Quote: 	
		   



 Neglected to mention in the original post that this is the original 1985 model 447 that came with a new (1985) Firestar back in the day, so it has the single points ignition/lighting coil/charging coil.

 Also - since the earlier post, started cutting apart the original wiring harness and discovered a diode with obvious connectors that would hook up to the Hobbs/hour meter. I am guessing I would attach those to the charging coil rather than the lighting coil, because all I want is the pulse, and not a lot of voltage. Also, I assume that if I hook it up to the hour meter and nothing happens, since it is a diode, all I need to do is swap the connectors?

 Thanks for all the help so far!



 --------

 Richard Pike

 Kolb MKIII N420P (420ldPoops)

 Kingsport, TN 3TN0

Richard,
	




I can't really see what model you've got, but all the actual Hobbs 

meters I've ever played with are simple clocks, that run when you apply 

voltage (for instance, through an oil pressure switch, or a landing gear 

'squat switch').  Are you thinking about something like a Tiny Tach, 

that has its own battery but senses ignition pulses?



Charlie

Richard Pike

Joined: 09 Jan 2006
Posts: 1669
Location: Blountville, Tennessee

Posted: Fri Feb 24, 2017 7:08 pm Post subject: Re: Hobbs meter?

Tiny Tach is great, I have one on my MKIII, but it is bigger than a Hobbs, and we need something to cover the hole where the original Hobbs was in the panel. No way the Tiny Tach will fit. Not to mention that I would need to figure out how to add 216 hours to it....

Talked to the original owner of our Firestar a while ago, and he seemed to remember that he got that diode from Kolb, and they told him how to hook it up. But he wasn't sure... (Grin) 

Will try hooking the Hobbs up to the charging coil, through the diode, and see what happens.

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Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0

Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing.

ceengland7(at)gmail.com
Guest

Posted: Fri Feb 24, 2017 8:28 pm Post subject: Hobbs meter?

I didn't think that was a pic of a Tiny Tach, but I wondered if your 

mixing up how the two devices function.



Good luck with it,



Charlie



On 2/24/2017 9:08 PM, Richard Pike wrote:

 	  Quote: 	
		   



 Tiny Tach is great, I have one on my MKIII, but it is bigger than a Hobbs, and we need something to cover the hole where the original Hobbs was in the panel. No way the Tiny Tach will fit. Not to mention that I would need to figure out how to add 216 hours to it....

 Talked to the original owner of our Firestar a while ago, and he seemed to remember that he got that diode from Kolb, and they told him how to hook it up. But he wasn't sure... (Grin)

 Will try hooking the Hobbs up to the charging coil, through the diode, and see what happens.



 --------

 Richard Pike

 Kolb MKIII N420P (420ldPoops)

 Kingsport, TN 3TN0

dickk9(at)aol.com
Guest

Posted: Sat Feb 25, 2017 7:32 am Post subject: Hobbs meter?

Along with the diode, a full wave bridge would be better, you should connect a capacitor (22mf 180v) across the output to filter the pulses.

Dick 

--

Richard Pike

Joined: 09 Jan 2006
Posts: 1669
Location: Blountville, Tennessee

Posted: Sat Feb 25, 2017 5:18 pm Post subject: Re: Hobbs meter?

 	  dickk9(at)aol.com wrote: 	
		  Along with the diode, a full wave bridge would be better, you should connect a capacitor (22mf 180v) across the output to filter the pulses.

Dick 

-- 	


OK, I think I know what you are saying, but you are talking to an electronics Hottentot. Really. Do I just go to the local electronics supply store and ask for such? And then attach it between the connectors? 

Thanks!

_________________
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0

Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing.

Richard Pike

Joined: 09 Jan 2006
Posts: 1669
Location: Blountville, Tennessee

Posted: Thu Mar 02, 2017 10:45 am Post subject: Re: Hobbs meter?

The mail lady left me a padded envelope in the box today, and inside it I found this: from Dick Kuntzleman, who took the time and trouble to spoon feed an electronically ignorant old man.



Thank you Sir, you have made my day.

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Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0

Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing.

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