The Fine Things are Always Hand Made

Need assistance

Greetings,

I have acquired a new Scott Philharmonic, illuminated dial AM/FM with a Chippendale cabinet, number RR-260 ,which may not be entered into your database. It is in fair unrestored condition and I have begun the restoration. Faulty tubes have been replaced as well as 60 capacitors (so far) but it is not playing yet. Fortunately I have an identical (I thought) complete working radio, which is awaiting cabinet restoration, on my bench to compare it to. I have found an open bleeder resistor bank that is riveted to the left wall of the chassis and have no continunity between the five terminals. My working chassis apparently had the same problem because this component has been replaced with four 5w resistors. With the knobs pointing up, looking at the chassis, the resistors are on the left wall. The values are (from top to bottom) 1750,470,470,2250. On the non working receiver, the second from the top terminal has never had anything connected to it. I have a feeling you guys have gone down this road before and I await your advice.

Larry

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Permalink Reply by Norman S Braithwaite on April 16, 2018 at 10:46am

Yes, we have been down this road before. From the ground side, the B+ divider resistor for the pointer dial Philharmonics are specified to have resistances between taps of 2200 - 430 - 420 - 1200 ohms. The "revised" Philharmonics (beam of light except maybe for some early ones, AM-FM) are specified to have resistances between taps of 2200 - 430 - 420 - 1700 ohms. I believe the resistor was changed to reduce problems with the record scratch suppressor circuit although that circuit was not employed in the AM-FM version. The best solution today is to find a 50 watt, 5000 ohm "Dividohm" resistor along with a couple additional taps and adjust the taps for correct voltages. The original mounting holes for the Candohm resistor has the correct spacing for mounting the 50 watt, 5000 ohm Dividohm resistor.

Norman

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Permalink Reply by Scott Seickel on April 16, 2018 at 11:57am

Best replacement is Ohmite D50K5K0E resistor with Ohmite 2121E taps and 9E-100 mounting tabs. Mouser is currently out of stock, but it should be available elsewhere.