[AMRadio] UTC CG-305

[Donald Chester]

>From: W4AWM at aol.com
>
>Sorry for the erroneous post.
>
>In all my catalogs, CG refers to audio transformers.  Are you sure of the
>number?

CG means  "commercial grade".  It applies to both audio and power 
transformers.  This line of transformers was originally designated "PA" 
(public address).  The CG numbers and PA numbers are the same, and the 
electrical  characterists are  usually t he same, but they may be physcially 
different.  The changeover took place in 1948.

CG (and PA) is UTC's mid-line.  It includes the CVM and VM series modulation 
transformers.  Their top line was the LS series.  There are audio and power 
LS transformers as well.  LS transformers were very expensive, even before 
WWII.  LS audio transformers are rated as hi-fi and suitable for broadcast 
service.

Their lowest grade transformers are the S series.  These are typical "ham 
radio" qualty transformers, with marginal power/voltage ratings and mediocre 
audio performance.

I'll  look up  the transformer when I get home f rom work.

Don K4KYV


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