[Boatanchors] CG-512

[Carl]

About all I can find is that the specs are the same as the PA-512 which 
is the standard version of yours. Still no connection info. However that 
model was around for several decades going back into the 30's.

Perhaps Bunker of Doom has one catalog with info.  Or look in old 
Handbooks, thats a fairly standard line to PP grids item.

Those measurements make no sense.

Carl


----- Original Message ----- 
From: "Barrie Smith" <barrie at centric.net>
To: "Boatanchors Mail List" <boatanchors at mailman.qth.net>
Sent: Friday, January 09, 2009 8:17 PM
Subject: [Boatanchors] CG-512


With 50, 200, and 500 Ohm primary taps to single choice PP grids an
Ohmeter should determine whats what.

Carl & All:

The transformer has 5 pins on one side, numbered 1 through 5.

I believe these pins are the primary side.  I would like to feed 600 ohm 
audio into the primary.

If I start with pin 1, I read 2 ohms to pin 2 and 4 ohms to pin 3.

There is no continuity between pins 1 through 3 to pins 4 and 5.

Pins 4 to five show 2.5 ohms.

The secondary has four pins, in two pairs.  One pin one each side is 
marked "F", the other pin on each side is marked "G".

Each pair has continuity  One side is 66 ohms, and the other is 56 ohms.

Since there iis no continuity between opposite pairs, I'm assuming that 
there are two separate windings that will achieve a center tap when the 
two pins that are marked "F" are tied together.

Some modulation transformers are built this way.

If I jumper the two "F" pins together, I get a reading of 121 ohms.

Anyway, as I said, I'd like to feed 600 ohm audio into one side and 
drive a pair of 100THs with the other.

Any help appreciated.

73, Barrie, W7ALW


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