I hid new electrolytic caps inside with room to spare.Ĭrosley used a lot of pot metal, as mentioned above, which has a tendency to crumble and warp. Mine still had electrolyte (basically battery acid) in it when I opened it. It uses a "Mershon" condenser for the filter capacitors - a fairly large "can" on top of the chassis which used liquid electrolyte. In case you are wondering, it is a 1928 model. It combines 3 desireable features from the 1920's: AC power, single dial tuning and a Neutradyne circuit. I have one of these in my collection, it is an interesting set from a "radio evolutionary" standpoint.
Have you received the parts for that set yet? I just need some more time to put my thoughts to the keyboard. If you need any tubes 80, 226, 227, or 71A tubes let me know I can send you some. If all the coils, transfomer windings and resistors check OK resistance wise, then change the power supply filter caps, and the bypass caps and you should then be able to try it with your dim bulb tester. It may be similar to AK "dog coffin" metal sets, I don't know. I'm not too familiar with the power supply on that set. Take resistance readings of the power transformer windings. Bad connections on the sockets are notorious problems. Good news is you can get new replacements easily from AES or RadioDaze.Ĭlean up the tube sockets and tube pins very well. The audio transformers in a TRF like yours were the most common component to fail. The resistance of the audio transformers varied a lot, so as long as they measure below 10k your probably OK. The primarys should be somewhere around 1000 ohms and the secondarys around 3000. Start with checking the audio transfomrers for continuity.
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