I have an RCA model 1-RA-60 that has an IF transformer open primary and secondary. I know my meter is good. Has anyone seen that before? The number on the transformer is 973573-5 and 489121-P. Where can I get one?
Phil

:I have an RCA model 1-RA-60 that has an IF transformer open primary and secondary. I know my meter is good. Has anyone seen that before? The number on the transformer is 973573-5 and 489121-P. Where can I get one?
:Phil

Phil,

IF transformers are quite hard to find now days. You may try removing the IF transformer from the circuit board (being careful not to damage the circuit board, (may take a little patience) and remove the coil. Check closely where the wires from the coils are soldered to the solder lugs. The wires may be broken there and and can be resoldered.

Radiodoc

What seems to happen is that the winding connections corrode - which might explain why both primary and secondary are open.

If you can't find and repair the fault, then it's best to replace with an IF xfmr from a junker.

It's a bit odd that both windings would be open. Are you sure you are measuring between the correct pins? As others have said, the wires occasionally break at the pin connections.
Rich

:What seems to happen is that the winding connections corrode - which might explain why both primary and secondary are open.
:
:If you can't find and repair the fault, then it's best to replace with an IF xfmr from a junker.

Phil: I just also posted this to doug...
Have you seen this device?
"IF or RF XFMR SUBSTITUTE"
....it seems that it is some sort of small sized substitute that you can mount under the deck to disguise it.
I have an email into the guy to ask him more about it.

http://www.dialcover.com/components.html

peter

:Phil: I just also posted this to doug...
:Have you seen this device?
:"IF or RF XFMR SUBSTITUTE"
:....it seems that it is some sort of small sized substitute that you can mount under the deck to disguise it.
:I have an email into the guy to ask him more about it.
:
:http://www.dialcover.com/components.html
:

Guys,

In the repair business I never had a great number of IF transformers bad. I just wish I had had the forethought years (and years?) ago to stock up on these when they were $1.50 each.

Radiodoc

:peter

Yeah!... well gees... y'know?...these things must still be out there somewhere.
.. like a big old surplus joint maybe... What did Miller do with all their old stock and firms like theirs that had tons of this stuff around? Did they dump it all in landfills??

:Yeah!... well gees... y'know?...these things must still be out there somewhere.
:.. like a big old surplus joint maybe... What did Miller do with all their old stock and firms like theirs that had tons of this stuff around? Did they dump it all in landfills??
:
Peter,

Companies, big and smaller, can do some weird things. As an example, a timber company in my area has been known to throw away a number of almost new chainsaws with only a broken chain or worn out bar. Go figure.

Radiodoc

:I have an RCA model 1-RA-60 that has an IF transformer open primary and secondary. I know my meter is good. Has anyone seen that before? The number on the transformer is 973573-5 and 489121-P. Where can I get one?
:Phil

Everyone was right. I dislodged the IF from the can and noticed three broken leads from the windings. But I didn't mark the positioning of the core. I don't know which terminals are the primary and which is the secondary, which winding is connected to the plate and screen of the IF amp and which winding is connected to the detector. I have two windings, one on top and one on the bottom of the core. Which is which?
Phil

::I have an RCA model 1-RA-60 that has an IF transformer open primary and secondary. I know my meter is good. Has anyone seen that before? The number on the transformer is 973573-5 and 489121-P. Where can I get one?
::Phil
:
:Everyone was right. I dislodged the IF from the can and noticed three broken leads from the windings. But I didn't mark the positioning of the core. I don't know which terminals are the primary and which is the secondary, which winding is connected to the plate and screen of the IF amp and which winding is connected to the detector. I have two windings, one on top and one on the bottom of the core. Which is which?
:Phil

Phil,

I was looking at a Miller IF coil just now. Pin 1 is marked with a color dot (on this one it is green). Looking at the bottom of the coil and color dot on the left, then pin 2 is directly across on the left. On the Miller coil this is the top coil. I believe this is the secondary winding. I am sure there are others on here who will correct me if I am wrong. If I am wrong I will invite their correcting me cheerfully.

Radiodoc

:::I have an RCA model 1-RA-60 that has an IF transformer open primary and secondary. I know my meter is good. Has anyone seen that before? The number on the transformer is 973573-5 and 489121-P. Where can I get one?
:::Phil
::
::Everyone was right. I dislodged the IF from the can and noticed three broken leads from the windings. But I didn't mark the positioning of the core. I don't know which terminals are the primary and which is the secondary, which winding is connected to the plate and screen of the IF amp and which winding is connected to the detector. I have two windings, one on top and one on the bottom of the core. Which is which?
::Phil
:
:Phil,
:
:I was looking at a Miller IF coil just now. Pin 1 is marked with a color dot (on this one it is green). Looking at the bottom of the coil and color dot on the left, then pin 2 is directly across on the left. On the Miller coil this is the top coil. I believe this is the secondary winding. I am sure there are others on here who will correct me if I am wrong. If I am wrong I will invite their correcting me cheerfully.
:
:Radiodoc
:

:::I have an RCA model 1-RA-60 that has an IF transformer open primary and secondary. I know my meter is good. Has anyone seen that before? The number on the transformer is 973573-5 and 489121-P. Where can I get one?
:::Phil
::
::Everyone was right. I dislodged the IF from the can and noticed three broken leads from the windings. But I didn't mark the positioning of the core. I don't know which terminals are the primary and which is the secondary, which winding is connected to the plate and screen of the IF amp and which winding is connected to the detector. I have two windings, one on top and one on the bottom of the core. Which is which?
::Phil
:
:Phil,
:
:I was looking at a Miller IF coil just now. Pin 1 is marked with a color dot (on this one it is green). Looking at the bottom of the coil and color dot on the left, then pin 2 is directly across on the left. On the Miller coil this is the top coil. I believe this is the secondary winding. I am sure there are others on here who will correct me if I am wrong. If I am wrong I will invite their correcting me cheerfully.
:
:Radiodoc
:

::::I have an RCA model 1-RA-60 that has an IF transformer open primary and secondary. I know my meter is good. Has anyone seen that before? The number on the transformer is 973573-5 and 489121-P. Where can I get one?
::::Phil
:::
:::Everyone was right. I dislodged the IF from the can and noticed three broken leads from the windings. But I didn't mark the positioning of the core. I don't know which terminals are the primary and which is the secondary, which winding is connected to the plate and screen of the IF amp and which winding is connected to the detector. I have two windings, one on top and one on the bottom of the core. Which is which?
:::Phil
::
::Phil,
::
::I was looking at a Miller IF coil just now. Pin 1 is marked with a color dot (on this one it is green). Looking at the bottom of the coil and color dot on the left, then pin 2 is directly across on the left. On the Miller coil this is the top coil. I believe this is the secondary winding. I am sure there are others on here who will correct me if I am wrong. If I am wrong I will invite their correcting me cheerfully.
::
::Radiodoc

Radiodoc
I see a green color on a pin on the inside or top of the IF. That would be pin 1. Now turning the IF so that I'm looking at the bottom or printed circuit view and identifying pin 1 from the bottom view, Is pin 2 the next pin going clockwise then pins 3 & 4 clockwise?
Phil
::

:::::I have an RCA model 1-RA-60 that has an IF transformer open primary and secondary. I know my meter is good. Has anyone seen that before? The number on the transformer is 973573-5 and 489121-P. Where can I get one?
:::::Phil
::::
::::Everyone was right. I dislodged the IF from the can and noticed three broken leads from the windings. But I didn't mark the positioning of the core. I don't know which terminals are the primary and which is the secondary, which winding is connected to the plate and screen of the IF amp and which winding is connected to the detector. I have two windings, one on top and one on the bottom of the core. Which is which?
::::Phil
:::
:::Phil,
:::
:::I was looking at a Miller IF coil just now. Pin 1 is marked with a color dot (on this one it is green). Looking at the bottom of the coil and color dot on the left, then pin 2 is directly across on the left. On the Miller coil this is the top coil. I believe this is the secondary winding. I am sure there are others on here who will correct me if I am wrong. If I am wrong I will invite their correcting me cheerfully.
:::
:::Radiodoc
:
:Radiodoc
:I see a green color on a pin on the inside or top of the IF. That would be pin 1. Now turning the IF so that I'm looking at the bottom or printed circuit view and identifying pin 1 from the bottom view, Is pin 2 the next pin going clockwise then pins 3 & 4 clockwise?
:Phil
:::

Phil,

That should be correct.

Radiodoc

::I have an RCA model 1-RA-60 that has an IF transformer open primary and secondary. I know my meter is good. Has anyone seen that before? The number on the transformer is 973573-5 and 489121-P. Where can I get one?
::Phil
:
:Everyone was right. I dislodged the IF from the can and noticed three broken leads from the windings. But I didn't mark the positioning of the core. I don't know which terminals are the primary and which is the secondary, which winding is connected to the plate and screen of the IF amp and which winding is connected to the detector. I have two windings, one on top and one on the bottom of the core. Which is which?
:Phil

Phil,

I just found an instruction paper in an empty IF transformer box and it shows pin 1 (color dot) goes to the detector diode plate, pin goes to ground/AVC, pin 3 goes to the plate of the preceding tube and pin 4 goes to B+. Hope this helps.

Radiodoc

:::I have an RCA model 1-RA-60 that has an IF transformer open primary and secondary. I know my meter is good. Has anyone seen that before? The number on the transformer is 973573-5 and 489121-P. Where can I get one?
:::Phil
::
::Everyone was right. I dislodged the IF from the can and noticed three broken leads from the windings. But I didn't mark the positioning of the core. I don't know which terminals are the primary and which is the secondary, which winding is connected to the plate and screen of the IF amp and which winding is connected to the detector. I have two windings, one on top and one on the bottom of the core. Which is which?
::Phil
:
:Phil,
:
:I just found an instruction paper in an empty IF transformer box and it shows pin 1 (color dot) goes to the detector diode plate, pin goes to ground/AVC, pin 3 goes to the plate of the preceding tube and pin 4 goes to B+. Hope this helps.
:
:Radiodoc

Radiodoc
Please take a look at my last Phil response.
Phil
: