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Beast of an old dinosaur.
Input tune? four 572b present a decent input impedance on all bands.
Check the grid bias resistors, 33 or 35 ohm, cant really remember.
definite replace the electrolytic caps, rectifier diodes.
If the tubes are soft, excellent candidate to drop a couple Russian triodes in.

[QUOTE="wavrider, post: 844576, member: 9893"] Beast of an old dinosaur. Input tune? four 572b present a decent input impedance on all bands. Check the grid bias resistors, 33 or 35 ohm, cant really remember. definite replace the electrolytic caps, rectifier diodes. If the tubes are soft, excellent candidate to drop a couple Russian triodes in. [/QUOTE]

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