Roberts RT22 - stiff tuning - UK Vintage Radio Repair and Restoration Discussion Forum

newlite4 · 21st Jan 2010, 3:49 pm

Having just done one of these sets and having to replace the broken tuning cord into the bargain, I noticed that the tuning drive worked fine when the chassis was out of the cabinet, but upon reassembly ,the tuning was stiff and prone to slippage. Upon inspection, following several removal and oiling operations, I noticed that the tuning wheel that drives the variable capacitor was jamming up against a section of beading that acts as a stiffener for the cabinet. It is almost as if these cabinets shrink slightly with age. The original assembler had filed away most of this beading, rendering it almost superfluous. A judicious removal with a coarse file corrected this fault.
Look out for this one, it had me going for hours!
Neil

21st Jan 2010, 3:49 pm	#1
newlite4 Octode Join Date: Nov 2003 Location: Bath, Somerset, UK. Posts: 1,805	Roberts RT22 - stiff tuning Having just done one of these sets and having to replace the broken tuning cord into the bargain, I noticed that the tuning drive worked fine when the chassis was out of the cabinet, but upon reassembly ,the tuning was stiff and prone to slippage. Upon inspection, following several removal and oiling operations, I noticed that the tuning wheel that drives the variable capacitor was jamming up against a section of beading that acts as a stiffener for the cabinet. It is almost as if these cabinets shrink slightly with age. The original assembler had filed away most of this beading, rendering it almost superfluous. A judicious removal with a coarse file corrected this fault. Look out for this one, it had me going for hours! Neil __________________ preserving the recent past, for the distant future.