[Ron Ramirez]

Let me show you how to reassemble the 2nd IF transformer. The procedure is the same for any of these types of Philco IF transformers, and disassembly is the reverse:

[Image: http://www.philcoradio.com/images/phorum...e00012.jpg]

Having rewired this IF transformer, it is ready for reinstallation in its aluminum can shield. I should mention at this point that the hair-thin wires of each IF winding are usually wrapped around the ends of each lead wire, so be careful when removing the old wires from the transformer unit.

The unit is encased in wax, and includes two fixed mica capacitors; one in parallel with each IF winding (primary and secondary). The transformer is tuned with two iron slugs, connected to threaded brass rods, which move the slugs in and out of the respective windings.

[Image: http://www.philcoradio.com/images/phorum...e00013.jpg]

Now that the transformer assembly is back in the can, the next step will be to reinstall the "keepers" to hold the transformer in place inside the can.

[Image: http://www.philcoradio.com/images/phorum...e00014.jpg]

The "keepers" and the two adjusters, which screw onto the ends of the threaded brass rods and make the IF transformers easier to tune. 1938 Philco IF transformers do not have the additional adjusters; the brass rods have slots on the ends for a tiny screwdriver to fit into.

[Image: http://www.philcoradio.com/images/phorum...e00015.jpg]

One "keeper" is threaded onto one of the brass rods.

[Image: http://www.philcoradio.com/images/phorum...e00016.jpg]

Now the other "keeper" is threaded onto the other rod. A tiny screwdriver can be used to get these started.

[Image: http://www.philcoradio.com/images/phorum...e00017.jpg]

But to tighten them down, you need to use a pair of small needle-nose pliers. Be careful doing this - watch each rod to make sure they do not screw inward as you tighten the "keepers".

[Image: http://www.philcoradio.com/images/phorum...e00018.jpg]

Now the keepers are tight, and the IF transformer will not come loose.

[Image: http://www.philcoradio.com/images/phorum...e00019.jpg]

In order to get the innards out of the can, you have to turn the brass rods clockwise enough so that the rods will clear the can for removal. Do not turn these in too far! I turned these in 10 turns which only left a little bit of rod sticking up on each adjuster; this was enough to allow the inner assembly to be removed.

Now that it is reassembled, turn each rod counterclockwise 10 turns. Keep in mind that you will have to realign the radio anyway, but counting the turns allows you to return the adjustment rods to approximately where they were before you started.

[Image: http://www.philcoradio.com/images/phorum...e00020.jpg]

The final step is to reinstall the small threaded adjusters over the little brass adjusting rods. Use a pair of needle nose Vise-Grips to hold the rod in place, then gently screw the adjuster onto the end of the rod. Do not tighten! Just screw them on until they are snug; that is enough.

[Image: http://www.philcoradio.com/images/phorum...e00021.jpg]

The transformer now has both adjusters in place, and is ready to reinstall on the chassis.