I have a couple of related questions. Working on a 1949 Stromberg-Carlson am/fm. Determined that the filter choke in the power supply is bad. That part is on order. Meanwhile, it also seems that the primary of the output transformer is bad. I get continuity in the secondary. However, when I check the primary I do not get continuity, but I hear static in the speaker. That perplexes me. Is the primary bad or OK? If it's bad, why do I hear the static in the speaker? Also, is it likely there is a circuit problem somewhere that caused both of these windings to go bad, or is it more likely that it's coincidence?

If the primary of the output transformer is bad, there cannot be any sound in the speaker. Some of the primaries are tapped. with a tap in the center or sometimes even off to the side of the center. Check this carefully. A short in a filter cap tends to burn out a choke.
:I have a couple of related questions. Working on a 1949 Stromberg-Carlson am/fm. Determined that the filter choke in the power supply is bad. That part is on order. Meanwhile, it also seems that the primary of the output transformer is bad. I get continuity in the secondary. However, when I check the primary I do not get continuity, but I hear static in the speaker. That perplexes me. Is the primary bad or OK? If it's bad, why do I hear the static in the speaker? Also, is it likely there is a circuit problem somewhere that caused both of these windings to go bad, or is it more likely that it's coincidence?

Agree with Mike S. Double-check your work. These audio xfmrs don't go bad often.

You reported continuity on the secondary of the xfmr. Unless you disconnected the speaker, you can't tell for sure. But since you can induce static on the speaker, I'd assume the secondary is OK.

For the primary use your most sensitive resistance setting (X10,000). Work down from here. Be sure to "zero" your scale for each setting. Your primary will be several hundred ohms. Your secondary will be from under 1 ohm up to 10 ohms, but usually under 1 ohm.

Thomas