sifam vu meter

[romeojesus]

i need your help!

sifam vu meter arrived for my g1176 from meterdistributor.com
a few weeks ago...

but it seems to be broken..

before i send it back to the us i just want to be sure that it´s
broken...

there´s no meter movement when attached to the g1176
so i connected it directly (no 3,6ohm resistor) to
a subgroup output of my mixing board...


...no meter movement, no matter what polarity!

measured the ac on the subgroup output and got up to 3 or 4 volts ac (don´t remember exactly)


now...can i be sure that the sifam ain´ working correctly and send
it back to the usa???

thanks

christian

 

[NewYorkDave]

The meter should have been shipped with a shorting jumper between its terminals to prevent damage to the movement--and, of course, this jumper must be removed before use. But I'm sure you knew that.

Check the zero-adjustment screw on the front of the meter and make sure that it isn't binding up the meter movement. The pointer should move up and down freely as you adjust the screw.

 

[Steve Jones]

I don't think that you will get a reading if you feed it AC, I would presume you would need DC to deflect it.

 

[gyraf]

Naa - a VU-meter should react to AC. ..and to DC as well, actually.

If it reacts to DC (e.g. when you measure it with your ohm-meter) but not to AC, then you've got a DC-type, not a VU-type.

Jakob E.

 

[romeojesus]

hmm!

well it does not react to ac nor dc...

so i can be sure it´s broken right?

 

[gyraf]

Yep, I'd guess so..

 

[radiance]

I ordered these selenium rectifiers (thanks Jakob for pointing me to them).
They (ELFA) have them while stock lasts. Then they will be discontinued.

I need these to make my 100uA meter into a VU meter (well, sort of I geuss).
When finished can I use this for the 1176 clone?
Is 100uA ok?

Ooops,

http://www.elfa.se/elfa-bin/setpage.pl?http://www.elfa.se/elfa-bin/dyndok.pl?vat=0&dok=2009909.htm

 

[radiance]

Does anyone know how to wire the above selenium bridge rectefiers?
I could not find a spec. sheat or anything on the Elfa website.
I want to use them to make my 100 uA meter into a VU meter as described in this thread.

These selenium rectefiers have a red dod on one side and that's it.

 

[kaur]

From my Elfa catalogue:
marking . (dot)
connection + AC - AC

 

[radiance]

Thanks Kaur!
It al starts to make sense now.
Just to make sure I got it right.
The . (dot) indicates pin 1

Then we have: connection + AC - AC

which means : pin 1=+, pin 2=AC, pin 3=-, pin 4=AC.

Is this correct?

I measured all pins with a diode tester and come to a similar conclusion.