ARS NB9M

Care & Restoration Articles

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Heath Tube-Type LMO Repair (PDF)

The tube-type Linear Master Oscillators (“LMO”) used in the Heathkit SB-Line equipment is a very stable and accurate means of controlling the frequency in the equipment. Unfortunately, as the units age, many LMOs develop a “warble” when tuning. This “warble” usually stops when the frequency control knob is not rotated. However, accurately “zero-beating&rdq...  READ MORE

UncleBrad
02/08/2018
Care & Restoration
Cleaning & Maintaining Collectible Radios

Cleaning & Maintaining Collectible RadiosIf you have found a treasure in reasonably good cosmetic condition, there is process to improve and stabilize it without a lot of work.Before you begin, ensure you have the best panels and other parts for your radios.  I use the best covers, knobs, meters and other components from donor rigs all the time. The fundamentals are the same as detai...  READ MORE

UncleBrad
07/04/2017
Care & Restoration
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