On my Philco model 46-1226 on the back edge of the chassis is what looks like an RCA jack and appears in the schematic that they are calling it an AF Test jack. What is an AF Test jack and what is it used for?

Could it be AVC test? One is shown on the schematic. Voltage can be measured here during alignment. If AF it could be for a record player.

http://www.nostalgiaair.org/Resources/588/M0013588.htm

Norm

:On my Philco model 46-1226 on the back edge of the chassis is what looks like an RCA jack and appears in the schematic that they are calling it an AF Test jack. What is an AF Test jack and what is it used for?
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I tried running a phono signal through it and got nothing. I guess it could be AVC test but diagram says AF Test. Don't get it.

:Could it be AVC test? One is shown on the schematic. Voltage can be measured here during alignment. If AF it could be for a record player.
:
:http://www.nostalgiaair.org/Resources/588/M0013588.htm
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:Norm
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::On my Philco model 46-1226 on the back edge of the chassis is what looks like an RCA jack and appears in the schematic that they are calling it an AF Test jack. What is an AF Test jack and what is it used for?
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Appears to be a AVC voltage test jack. It was probably mislabeled on the chassis drawing, where it is identified as "AF Test Jack". Yet on the equivalent chassis photo, it is identified as the "AVC Test Jack".

To confirm that it is an AVC test jack, put the positive lead of a DC voltmeter on the jack center conductor, negative lead to chassis ground. Turn on the set and tune to a strong station. Voltage at the jack should be several volts negative. Now detune the set (no station)- voltage should rise (i.e. go toward zero volts) by a few volts.

:On my Philco model 46-1226 on the back edge of the chassis is what looks like an RCA jack and appears in the schematic that they are calling it an AF Test jack. What is an AF Test jack and what is it used for?

I looked close at the schematic. The AVC is a test point, not a jack. The jack is marked "AFL" on the schematic and goes to the end of R16(pot) The center(wiper) of R16 goes to a switch to switch between the radio and phono input. That goes thru C27 to the grid of the first stage audio tube. I think the "AFL" jack on the schematic is the phono input or can be used to test your audio stage of the radio. Of course you must put the switch in the phono mode to be able to do either phono or audio test.
C Harris

::On my Philco model 46-1226 on the back edge of the chassis is what looks like an RCA jack and appears in the schematic that they are calling it an AF Test jack. What is an AF Test jack and what is it used for?
:
:I looked close at the schematic. The AVC is a test point, not a jack. The jack is marked "AFL" on the schematic and goes to the end of R16(pot) The center(wiper) of R16 goes to a switch to switch between the radio and phono input. That goes thru C27 to the grid of the first stage audio tube. I think the "AFL" jack on the schematic is the phono input or can be used to test your audio stage of the radio. Of course you must put the switch in the phono mode to be able to do either phono or audio test.
:C Harris

If your phono cable is hard wired into the switch of your radio then the AF test jack is strictly used to put an audio frequency into the 1st stage audio tube in order to test the audio section of your radio, but you must put the selection switch into the phono position to do that.
C Harris