Old Device, seeking Clarification as to What exactly it is.

[Kevin Cozens]

Scott Sullivan wrote:
> http://openrebel.ss.org/images/what-is-this-device.jpg
> (sorry about the flash, model is 174 A)

The flash obscured part of the model number but "47A" can still be seen 
in the picture so the model number is likely 147A. It is a piece of 
equipment used in older days to test and troubleshoot radios and 
televisions.

The unit you have is missing the magic eye tube as is evidenced by the 
small hole near the top right corner on the front panel. A picture of a 
complete unit can be seen on the page at 
http://oak.cats.ohiou.edu/~postr/bapix/SigTrac2.htm

Manuals and schematics for some older test equipment are supposed to be 
available at: http://www.one-electron.com/FC_TestEquipment.html

A JPG and PDF version of the schematic is available at 
http://www.cbtricks.com/radios/eico/model_147a/index.htm

A manual is available from a link on the page at 
http://www.nostalgiaair.org/references/Manuals/. The manual includes an 
image of the internal wiring of the unit and a schematic.
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