ce. 1960 Rickenbacker 105
Work progress for S. Ochoa
Tuning machines and covers are in excellent condition. Lubed with Tri-Flow TPFE. DO NOT USE AN OIL BASE LUBE WHERE THE STRING SHAFTS GO THROUGH BARE WOOD; USE GRAPHITE ONLY (Pencil lead will work just fine)
Pot code 137 6020 signifies that the pots are CTS pots made in the 20th week of 1960. The 20th week probably dates the guitar in late 1960, but the pots could have lasted until early 1961. I will try to find 1960's serial number codes if they are available. Professional networking of specific Rickenbacher / Rickenbacker Steel guitars' serial numbers is just now starting to show serial number trends. Solder joints look original with no apparant duplications. Pots are likely 250K (V) and 500K (T); I will check during inspection and make changes to those numbers here if they're different. It was not uncommon for guitar companies to change pot and filter cap values as their philosophies changed or field experiences and players preferences evolved.
Pickup with it's base plate and horse-shoe magnets removed for inspection. The coil's static resistance is 2K ohms, indicating that the pickup is of the old stock that is much better than later machining runs up to 1973.
Every indication is that all solder joints are professional and not duplicated (in later repairs) and thus most likely factory joints.
Parts laid out except for screws that are in an oil bath. 3 screws were not original type and will be changed to original type. Hardware has some nominal pits and use marks, but less than usual for the guitar's age. All parts will clean up nicely / innocuously prior to reassembly.
The doctor is in; No majory surgery indicated so far. Extra horse-shoe pickup handy for any comparative references that might be convenient.
--- Headstock, Tuners and Electronics ---
Lubrication of tuners: Apply one drop of oil at each oiling point about every 5 years or-so. Oiling points shown below. That's a good time prior to oiling, to remove the strings and the tuners from the guitar and give the string shafts some DRY graphite where they ride in the wood holes. Oil on a guitar's bare wood is NOT good; It will soften the wood over time. I HAVE LUBED THESE TUNERS; Next lube due in 2013 or-so:
One drop in each gear trough on each tuner.
One drop in each knob shaft boss.
Do not lube behind this gear; The oil can get behind the plate and into the string shaft wood hole and mounting screw holes.
After lubing, turn each tuner knob completely 25 times in the tune UP direction.