[BC] A What's it?

[Phil Alexander]

On 7 Nov 2005 at 6:01, Milton R. Holladay Jr. wrote:

> On the VU panel, Phil, you're not doing too much better. I believe that
> you'll find that those are Triplett meters, which had non-standard
> sensitivity, IIRC, 10 dB more sensitive.

Yes, I suppose Triplett is a possibility. If anyone can the 32167 19
number stamped on them, that would be conclusive. However, it is
clear the original meters were replaced with these quite some time
after original manufacture, which, from the type of wire used I'd
place as either late '30's or late '40's.

Too bad the original meters weren't there. Those Weston VU meters
were used on all the WE equipment I ever saw as well as most of the
top of the line gear from the immediate post-war period.

I'm curious, how did they get anything resembling a normal ballistic
from a meter with greater sensitivity? I'd also think the impedance
would be quite a bit lower.

IIRC the standard VU meter had an impedance of 3900 ohms as a bare
device and the meter attenuator had an inpedance of 7200 ohms for
+4 and above.

It is clear from the tag on the back that Plough Corp. owned them once
upon a time.

> (I have a factory sheet on these somewhere.) Cinema Engineering, yes.
> What will it take to part you from them, Alan ?


Phil Alexander, CSRE, AMD
Broadcast Engineering Services and Technology 
(a Div. of Advanced Parts Corporation) 
Ph. (317) 335-2065   FAX (317) 335-9037





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