09-01-2023, 09:29 PM
Hi Chas ,
Thank you for your helpful reply . I am much closer now to figuring out which coil tags are connected to what. And , yes, the ohmmeter readings do provide clues.
I presume that ,when on broadcast , all the windings on the secondary of coil #2 are in circuit seeing as broadcast is the lowest frequency band the radio tunes to. Thanks for the pointers there.
Another mystery has revealed itself in the meantime. One of the leads to Cap 21 which links the tops of the primary and secondary windings of coil#1 and which sits in the top of coil#1, has corroded away so that part of the circuit was open circuit.
Looking to replace this cap I found when I checked the schematic (a slightly blurry Radiomuseum one ) I found it listed ( in a separate box on the schematic above the R16 listing) as 10 mfd ceramic. Certainly it is ceramic but the capacity at 10 mfd seems very high, especially for such a physically small capacitor. Could the 10mfd be a misprint? If 10mfd is correct why is it ceramic? What should I replace it with? Thanks for your help with this set. And thanks to the Phorum for facilitating this kind of assistance. I'd be lost without it.
Thank you for your helpful reply . I am much closer now to figuring out which coil tags are connected to what. And , yes, the ohmmeter readings do provide clues.
I presume that ,when on broadcast , all the windings on the secondary of coil #2 are in circuit seeing as broadcast is the lowest frequency band the radio tunes to. Thanks for the pointers there.
Another mystery has revealed itself in the meantime. One of the leads to Cap 21 which links the tops of the primary and secondary windings of coil#1 and which sits in the top of coil#1, has corroded away so that part of the circuit was open circuit.
Looking to replace this cap I found when I checked the schematic (a slightly blurry Radiomuseum one ) I found it listed ( in a separate box on the schematic above the R16 listing) as 10 mfd ceramic. Certainly it is ceramic but the capacity at 10 mfd seems very high, especially for such a physically small capacitor. Could the 10mfd be a misprint? If 10mfd is correct why is it ceramic? What should I replace it with? Thanks for your help with this set. And thanks to the Phorum for facilitating this kind of assistance. I'd be lost without it.
