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Mystery electronic box

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jdubner

Joined: 17 Jul 2012
Posts: 35
Location: Independence, OR

Posted: Thu Dec 26, 2013 1:18 pm Post subject: Mystery electronic box

Can anyone identify the box in the two accompanying photos?  There are four

relays, more than a dozen silicon diodes, and a power resistor.  I can hazard a 

guess or two but would like to hear from someone who recognizes the box and 

knows what it is.



My neighbor cut it out of a Speed Canard he's rebuilding.  The operative words

are "cut out"; I do not know to what it was connected.



-- 

Joe

Independence, OR

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Mystery_Box_1.jpg

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Mystery_Box_2.jpg

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_________________
Independence, OR

JOHN TIPTON

Joined: 17 Sep 2006
Posts: 239
Location: Torquay - England

Posted: Thu Dec 26, 2013 2:21 pm Post subject: Mystery electronic box

What have gone an done !!!



Sent from my iPad



     ----x--O--x----



 	  Quote: 	
		   On 26 Dec 2013, at 21:14, Joe Dubner <jdubner(at)yahoo.com> wrote:

 

 Can anyone identify the box in the two accompanying photos?  There are four

 relays, more than a dozen silicon diodes, and a power resistor.  I can hazard a guess or two but would like to hear from someone who recognizes the box and knows what it is.

 

 My neighbor cut it out of a Speed Canard he's rebuilding.  The operative words

 are "cut out"; I do not know to what it was connected.

 

 -- 

 Joe

 Independence, OR

 

 <Mystery Box 1.jpg>

 <Mystery Box 2.jpg>

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Eric M. Jones

Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts

Posted: Thu Dec 26, 2013 2:49 pm Post subject: Re: Mystery electronic box

It's a relay box. 



Did I win? What's the prize?

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_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net

ceengland7(at)gmail.com
Guest

Posted: Thu Dec 26, 2013 4:19 pm Post subject: Mystery electronic box

On 12/26/2013 3:14 PM, Joe Dubner wrote:

 	  Quote: 	
		   Can anyone identify the box in the two accompanying photos?  There are 

 four

 relays, more than a dozen silicon diodes, and a power resistor.  I can 

 hazard a guess or two but would like to hear from someone who 

 recognizes the box and knows what it is.



 My neighbor cut it out of a Speed Canard he's rebuilding.  The 

 operative words

 are "cut out"; I do not know to what it was connected.



Don't recognize the box, but the 1st thing that comes to mind would be a 
	


selective controller (and high current protection for switches) for trim 

functions. There are commercial products that allow 2 sets of trim 

switches, and can give '1st push' priority for control, or 

pilot-priority for control.



Charlie

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sprocket(at)vx-aviation.c
Guest

Posted: Thu Dec 26, 2013 5:34 pm Post subject: Mystery electronic box

It's a 2-channel relay deck.  One pair is used for (pitch?) trim (labeled on 

wire).  The second may be for speed brakes or nose gear... not sure.

The power resistor may be used to limit stall current (landing gear) or the 

speed of the trim motor.



This is a guess, but the wiring shows one wire set as 'trim'.



Vern



--

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nuckolls.bob(at)aeroelect
Guest

Posted: Thu Dec 26, 2013 6:20 pm Post subject: Mystery electronic box

At 07:35 PM 12/26/2013, you wrote:


<sprocket(at)vx-aviation.com>



It's a 2-channel relay deck.  One pair is used for (pitch?) trim 

(labeled on wire).  The second may be for speed brakes or nose 

gear... not sure.

The power resistor may be used to limit stall current (landing gear) 

or the speed of the trim motor.



This is a guess, but the wiring shows one wire set as 'trim'.



Vern



   That's my guess too . . .



   Bob . . .

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jdubner

Joined: 17 Jul 2012
Posts: 35
Location: Independence, OR

Posted: Thu Dec 26, 2013 7:50 pm Post subject: Mystery electronic box

Charlie England wrote, On 12/26/2013 16:18:

 	  Quote: 	
		   Don't recognize the box, but the 1st thing that comes to mind would be a 

 selective controller (and high current protection for switches) for trim 

 functions. There are commercial products that allow 2 sets of trim 

 switches, and can give '1st push' priority for control, or 

 pilot-priority for control.


	


Vern Little wrote, On 12/26/2013 17:35:

 > It's a 2-channel relay deck.  One pair is used for (pitch?) trim

 > (labeled on wire).  The second may be for speed brakes or nose gear...

 > not sure.

 > The power resistor may be used to limit stall current (landing gear) or

 > the speed of the trim motor.

 >

 > This is a guess, but the wiring shows one wire set as 'trim'.



Robert L. Nuckolls, III wrote, On 12/26/2013 18:19:

 >   That's my guess too . . .



Eric M. Jones wrote, On 12/26/2013 14:49:

 > It's a relay box.

 >

 > Did I win? What's the prize?



I think you're all correct.  A relay deck/trim controller makes sense especially 

in light of the Speed Canard having electric trim switches on both sticks.  Good 

job -- apparently this was easy (for everyone except me 



Alas, there is no prize but I will have the satisfaction of telling my neighbor 

he needs to repair the cut wires and re-install it <g>.



Thank you all.



--

Joe

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_________________
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