Saturday, May 1, 2021

Hallicrafters S-120 Restoration Project

Latest update: 

May 8, 2021 - Re-cap completed and tested.  See below video of it on radio.cz - the next step is to cleanup the front and paint the cabinet.

April 30, 2021 - As received there was nothing but noise on all bands - checked voltages on tubes and found some issues - replaced selenium rectifier and voltages now closer to what is expected, still noting but noise.  I ordered a complete capacitor re-cap kit.  Looked around for any obvious issues and found cracked .001uf capacitor between antenna connection and another connection point (see picture) - temporarily bypassed it with on-hand capacitor of same value but lower voltage rating - miraculously she sprang to life and I was able to receive a nearby AM station with some static. 

Next steps are to complete a re-cap and align - then look at tubes to see if any are weak and need replacement.  Once all of that is complete I can begin the cosmetic cleanup on the outside.


As purchased on eBay (below)










Inside bottom view before any work done













Selenium diode (green device) replaced with 1N4007 diode - the large black component is a "glowbar".













Temporarily replaced this large .001uf capacitor with one on-hand but with smaller voltage rating until re-cap kit arrives.













Unit on my lab bench. May 1, 2021.











Recap complete - yellow capacitors from Hayseed Hamfest - https://hayseedhamfest.com/products/s-120-re-cap-kit 













Listening to readio.cz after re-cap


 

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