[ARC5] F13A

Fri, 6 Dec 2002 11:54:42 -0700

It may be part of an instrument landing system...???
Jay

-----Original Message-----
From: Brad Hernlem [mailto:[email protected]]
Sent: Friday, December 06, 2002 10:50 AM
To: [email protected]
Subject: Re: [ARC5] F13A

Here is some more info on this unit. Does anyone know what this was part of 
or what it was used for? I would appreciate any help.

The front has a metal plate bearing the following:

AUDIO AMPLIFIER
TYPE F-13 A
SERIAL #566  2.5 LBS.
Aircraft Radio Corporation
BOONTON NEW JERSEY

There is a ruby red and silver ARC logo button on the front which has been 
spray painted over with orange paint. Below is a 12-pin male connector with 
the miniature banana pins like on "ARC-5" gear. This junction is labelled 
J-102. To the right of that is a trim pot with locking nut labelled "LEVEL 
SET". At the very bottom are two large slide and lock fasteners typical of 
"ARC-5" gear only larger. No other markings appear anywhere on outside of 
unit.

Dimension are 4 5/8" high, 4 3/4" wide and 6 3/4" deep. The back shelf 
presumably for the dynamotor is 3 1/4" deep and the entire lower compartment 
is about 2" high. The back shelf has four shock mounts and a three pin 
connector as if for a dynamotor.

The circuit is very simple. A signal from J-102 pin E goes to the trim pot. 
Its wiper goes to a transformer T101 that outputs to two resistor voltage 
dividers to pins 1 of the two tubes. Their outputs drive the output 
transformer T102 in push-pull. The output transformer has four output 
connections (two midway taps).

Brad

>From: "Brad Hernlem" <[email protected]>
>To: [email protected]
>Subject: [ARC5] F13A
>Date: Fri, 06 Dec 2002 05:55:52 +0000
>
>I've got an ARC audio amplifier tpe F-13 A. Any info on this? It uses two 
>6005 tubes.
>
>TNX
>
>Brad
>

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