[Milsurplus] I-70-B Meter(BC-31)

[Mike Hanz]

This is one of the accursed 3 volt bulbs that Bendix was fond of using 
in their entire line of DF sets through the AN/ARN-7, and with one 
exception I cannot recall any other application that is not unique to 
that manufacturer.  The exception is a pair of them used in series for 
an APG-13 scope to light up the reticule for the 2" CRT.  In any case, 
3v is what you'll need to supply it to get it to glow normally.  BTW, 
this "tune to max" meter is sometimes a fairly hot radiation emitter - 
not a problem unless you take the glass out or sleep with it next to 
your face for a few years, but something to keep in mind.

Best 73,
Mike

n2lxm@juno.com wrote:

>Greetings All,
>
>
>
>	After looking for an S-Meter for one of my low End National Receivers
>(an outboard accessory) and never finding one I decided to use a Type
>I-70-B Tuning Meter from a BC-311.  I ordered one form Fair Radio and it
>arrived today. My question is does anyone know what the Illumination Lamp
>number is and what voltage does it operate at? The one that is in the
>meter seems to be very bright at only 3 VDC, and I do not what to hook it
>up till I am sure of what voltage should be used.  Also is this type of
>lamp still available today. Any and all help will be greatly appreciated
>.
>
>
>
>                                         Jeff N2LXM
>                                          American
>                                            Patriot
>                                Amateur Radio Operator
>                         Proud Father of Two U.S. Marines
>
>_______________________________________________
>Milsurplus mailing list
>Milsurplus@mailman.qth.net
>http://mailman.qth.net/mailman/listinfo/milsurplus
>
>  
>