"Ninja" wrote in message
...

"robb" wrote in message
So i can replace the 36 ohm (it is fried) with anything close
and
probably should choose one on the higher side (i.e. 47 Ohm
over
the 22 Ohm) ?

Robb,

In changing the resistor from 36 ohm to 47 ohm, just consider
that your Vcc2
will decrease by about another 1/2 volt (in addition to the
1-1/2 volt
already dropped by the 36 ohm one). On a 32 volt supply, it
totals to less
than 10%, so you might be just fine. It's hard to say from here
just how low
your VCC2 can go without affecting operation or reliability.

Considering power dissipation in the resistor, 40 ma through 47
ohms will
dissipate just 75 mw, so a 1/4 watt resistor will still be
fine.

Thanks Ninja,

i found a 39 Ohm resistor among my meager supply so i am a bit
closer to original.

the application was the supply power to a VFD display so i
suspect a lower voltage will just dim it up a bit maybe give the
VFD a bit more life .

Thanks for the help,
robb