[HUG] Re: NOW: ELM? Re: Re: motor f for 203fe questions

Quoting Q.G. de Bakker, who wrote on Fri, Nov 30, 2007 at 04:46:20PM +0100 ..
> Wilko Bulte wrote:
> 
> >>Wow - 500ELM costs 1/2 of the used 200 motor grip.
> >>Can you trigger a 500ELM electronically?
> >
> >Oh yeah.  And easily too.  Get the right "DIN" plug, a piece of cable and 
> >a
> >momentary action switch.  Solder it together in the right way and you are
> >gOod to go.  That is what I did.
> >
> >Of course Hasselblad also produced the necessary cabling etc.
> >
> >But for me this was the cheapest and easiest solution.
> 
> It indeed is.
> Though the cable shouldn't be too long, i.e. the external electrical 
> resistance not too high, or the trigger becomes unreliable. But you can go 
> long enough for most purposes before that happens.

I used some thin coax cable, for no other reason than that I had it lying
around.  The cable is approx 2 meters long I think.  

> If not, Hasselblad also sold a solid state cable amplifier, plus long 
> reels with amplifier incorporated.

Yep, 30 meters if I am not mistaken.  The amplifier is reputedly not much
more than 1 or 2 transistors and some resistors.

> And you should be able to trigger the camera by radio too.
> I don't know though who is selling a suitable transmitter/receiver 
> combination (Quantum?).

You could potentially find yourself a radio kit that allows modification
to drive a small relay.  Then connect the relay contacts to the EL* camera.

I had my hands on the original Hasselblad radio control.  It had a small
defect that I fixed (battery clip wiring was broken in the transmitter).
Apart from that I did not like it, it proved to be unreliable.  SOmetimes it
fired the camera, sometimes it did not.  Could be that it worked better when
it left the factory in the 1970s.  Lacking schematics and adjustment
information (it has tons of adjustable coils in the transmitter) I did not
mess around with it any further.

> It will cost a bit more than a cable, a switch, and a plug though.

Absolutely.

Wilko

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