Circumstances: Dynaco SCA-35 that may be best described as "neglected" , a s follows:
Filthy with greasy grit - what I would consider to be kitchen-type grease m ixed with black grit similar to what landed on windowsills when I grew up i n NYC, with regular dust co-mingled. To the point that individual component s on the boards were very nearly indistinguishable.
Most of the controls sprayed with white lithium grease that had hardened to near-concrete status.
Most of the rotary controls frozen - hard. The exceptions being the rear hu m-pots that had never been touched, and so remained operable.
Process: Rinse the entire shebang in WD-40, purchased in bulk and delivered via pressurized refillable aerosol can. Probably a pint used overall. Done over a trash-can with some kitty-litter on the bottom. This loosened the s kunge. Rinse with CRC, over the same trash-can after 24 hours. This pretty much removed the _EXPOSED_ skunge on the controls, switches and boards. All of a sudden individual components became visible. Flushed the controls wit h WD and CRC - amazing the amount of waxy crap that came out.
Wipe down with lint-free cloth, stiff artists' oil brushes and high-proof i sopropyl alcohol.
Apply lubricating cleaner to all rotary and sliding controls. Apply Liquid Wrench to all shafts.
24 hours. 3 of 5 controls were free. Bass & Selector-switch still frozen, hard. Apply Kroil. 12 hours. Re-apply Kroil.All shafts are free.
More basic cleaning. Check _every_ connection with a dental pick. Tighten a ll tube bases. Apply power, no tubes. All good. 40 minutes, no unusual heat signatures.
Add tubes. Short inputs. As above, draws 85 watts, below nameplate of 110 w atts. 1 hour, all voltages stable and correct.
Add speakers and signal - Voila! Sound, hum and buzz-free. All controls wo rking properly.
Peter Wieck Melrose Park, PA