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Showing results for tags 'potentiometer'.
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These speakers were given to me by a friend of mine at church who had them in the back of his truck destined for Goodwill. The cabinets were fairly rough and the grille fabric had been replaced but everything else was original. I had never restored a set of speakers before but thanks to the encouragement of Roy, Glenn, Kent and others on this site, I have spent the last 6 weeks restoring them and am very happy with how they turned out. Here are a few of the details: Year: 1963-4 Make: Acoustic Research Model: AR-3 Serial #s: C21604 & C21611 Restoration summary: - Original dual 24uF and 6uF paper capacitor replaced with new Solen 24uF 400V and Dayton Audio 6.2uF 250V Precision Audio Capacitors from Parts Express - Original 16 Ohm / 25 Watt wire-wound potentiometers were corroded beyond repair and were replaced with modern reproduction wire-wound potentiometers of the same size and specifications from captainfantastic07 on eBay. - Cabinets sanded and hand-rubbed with Watco Danish Oil (Dark Walnut) and finished with four coats of Minwax satin polyurethane. - Woofer perimeter and bolt holes resealed with speaker sealing caulk from Parts Express - Original plastic speaker grill frames replaced with more durable 1/4" Masonite for easier installation and removal. - Masonite speaker grille frames spray painted flat black before wrapping with fabric to prevent frame being seen through fabric. - Reproduction speaker grille saran material from Q-Components in Canada. - 3M automotive trim adhesive tape followed by ¼” heavy duty staples to prevent slipping of material or fraying of fabric edges - Reproduction “AR Inc” and "3" pin from jKent Attached are a few pictures so you can see before and after and some of the steps along the way. I plan on enjoying them for a while and then will probably try selling them locally before putting on eBay to avoid the hassle and potential damage associated with shipping. Thank you to Roy, Glenn and Kent for all of your input and for the wealth of information everyone else has contributed to this site! If you have any questions or comments, please let me know! Thanks, Steve
After first being in denial, and then just being annoyed, I need to take action. My beloved 3as, which I received in pristine, unmolested condition in 2010, and for which I made the typical fixes, are now getting a little scratchy in the mids. Just one of them, really. It's the pots, methinks. I brushed away all the green residue with a Dremel back in 2010, and they looked quite clean, but something must have changed. Now, in loud passages, I hear scratchiness. It is not apparent in music for strings, but in solo piano music, or music for flute or French horn, I hear it plainly. It almost sounds like tape distortion, but I know it isn't. So, what think you all? Am I likely to find more green crud on the pots to clean off? Should I have used some sort of something on the pots when I cleaned them to improve contact and resist future corrision? Is it time to think about abandonning the original pots? I would prefer, for reasons I cannot justify, to keep them as original as possible. Lastly, is there any chance that it isn't the pot? Thanks in advance.