Actually it looks like a filament trans. Only two secs, and they’re both 10V. The 1780V RMS to ground is prob a high pot rating, not a winding.

Sent from Mail for Windows

From: Doran Platt
Sent: Monday, January 10, 2022 7:04 AM
To: Michael Hanz; Robert Downs; Roy Morgan; [email protected]
Cc: ARC-5 List; [email protected]
Subject: Re: [ARC5] [Milsurplus] Navy Transformer CRV 30810

Looks like it would supply HV to a CRT indicator and fil.

KK3HVG

On 01/10/2022 6:36 AM Michael Hanz <[email protected]> wrote:

It's actually on PDF page 97 of 154.  As you can see, it is for the Navy Model NMC-1 Echo Sounding Equipment, Contract NXss. 23136, Submarine Signal Co., Boston, Mass. Feb. 5, 1943.

On 1/10/2022 1:23 AM, Robert Downs via Milsurplus wrote:

Roy,
 
I would call that an HV x-former, (with filament winding.)  Not a filament transformer.
 
Where did you find the -30- listing?
 
Robert Downs
 
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Roy Morgan
Sent: Sunday, January 9, 2022 22:57
To: [email protected]
Cc: ARC-5 List; [email protected]
Subject: Re: [ARC5] Navy Transformer CRV 30810
 
Amazing.
 
For many decades I have had here a filament transformer
CRP· 301721
And though it does have markings telling the voltages, I was amazed to find it listed in the 30-class transformers listing
 

On Jan 1, 2022, at 5:30 PM, [email protected] wrote:
 
https://www.navy-radio.com/manuals/nt/NT-900109-3.30.xfmrs.pdf
 
Page 42
 
SECONDARY 3200 VCT 0.163 AMP WHEN USING HIGH P R I M A R Y
2740 V  0.153 AMP DC WHEN USING LOW PRIMARY
4750 TURNS CT, 0.0159 E WIRE, 233 OHMS DC. 

Roy Morgan
K1LKY since 1958
[email protected]
Western Mass
 
 
 
 
 
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Michael Hanz - KC4TOS

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