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lARrybody

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About lARrybody

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  • Birthday November 6

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    Carmel,IN
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    Tech gadgets, Family, Friends, Vintage Stereo,Pizza

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  1. I was driving to the grocery store two Saturdays ago and I pass a garage sale sign. In the spirit of social distancing I slowly pass by looking up the driveway I see two floorstanding speakers that appear to be Advent Prodigy's. Parking and putting on my mask I walk up to take a closer look. They weren't Advents at all, but had AR emblems. They were TSW 510 in relative nice shape. The homeowner said they were inherited from a uncle and there were two smaller bookshelf speakers (TSW 100) to go with them. This was the first pair of TSW speakers I have encountered in person. I knew they were from later on (1989), but they did say Teledyne Acoustic Research on them. Upon negotiation and after a major reduction in the asking price I loaded them into my SUV. Here they are back home. One of the small 100's is missing the Acoustic blanket around the tweeter. One of the woofers on the 510's is different, not a poly cone. I hooked them up to a sacrificial Lepai T-amp and Sony Walkman and they sounded pretty good. The paper coned woofer turned out to be a AB tech replacement. It had a DCR of 7.7 ohms. There was no gasket sealing the woofer in the cabinet. I removed the poly cone woofer and it had a DCR of 3.7 making it a 4 ohm driver. The TSW 510 is rated at 4 ohms. After re-installing the woofers with gasket tape and doing some listening I could not detect any differences in sound or volume from either woofer. How big of difference should a 4 ohm and 8 ohm speaker have? What will this mean to a amplifier? Should I look for the correct woofer? Thanks Larry
  2. Have you seen this thread dealing with ferrofluid replacement?
  3. I attempted to use those same Vishay 1837 bypass caps on a recap project but found the leads to be way to short. I wound up using the Parts Express Film and Foil bypass caps which have longer leads. I ordered some 20 AWG tinned copper wire from Remington Industries and plan on using it to extend the Vishay leads on my next recap project.
  4. Once you get the cabinets sanded I would use the Natural Watco Danish Finish. Be careful with the sanding especially at the edges. The venere is very thin and easy to sand thru. I would start with a 120 grit with light pressure and then go to a 180 or 240 grit. Here are some pictures of some AR2ax walnut speakers with five applications of Watco Natural finish.
  5. Welcome Mike123. Your grandfather left you some quiet desirable AR speakers. As far as I know foam surrounds were not used in AR speakers until 1968 with the introduction of the AR 5. AR 3 woofers used cloth surrounds and usually don't need replaced. Post some pictures of your woofers and someone can help identify them. And yes the caps are located inside the speaker box and probably should be replaced.
  6. Some original pots I cleaned up five years ago for some AR2ax's. After three plus years they started getting drop-outs. Subsequently they have been replaced with L-pads. L-pad installed in a AR4x crossover. This is not my picture or work. You can get these from suppliers like Parts Express and Madisound. On the left is a Ohmite RHS15 R and some ceramic potentiometers currently available on ebay and from others. They are electrically identical to the original aetna-pollack pots but far superior in construction and function. The AR3a restoration guide covers this subject in great detail. http://www.classicspeakerpages.net/library/acoustic_research/original_models_1954-1974/original_models_schematicss/restoring_the_ar-3a/
  7. I have used a Dremel tool with a small round brass brush. Over time I also came to the conclusion that I was wasting my time. There is not much you can do about pitted out disk and wipers. The L-pad or replacement pots are the way to go. Years ago I saw some solid state pots using small resisters and a rotary switch. Does anyone have information about these?
  8. Welcome Ableburger, Here are some related threads that may provide you information on your AR 6 speakers. Pictures of your speakers would be interesting to many of the members here.
  9. I used two 1000uf Bennic electrolytic And one 500uf Bennic electrolytic wired in parallel. Film caps of that value would be huge. The Bennic’s weren’t that small. May I suggest you check the original 2500 and see if it has drifted out of spec.
  10. Here is what I have used for inexpensive 6uf caps. Left (blue) are Clarity PX caps, top (black) Erse PlusX caps, left (yellow) Carli mylar caps and my favorite Dayton 3uf polys paralleled to bring them to 6uf. I have also used much more expensive caps. You can Parallel 2.7uf and 3.3uf Mundorf Supreme, Jansen Superior and Clarity CSA caps. The possibilities are numerous. The Parts Express Electrolytic caps will work fine. I have used the big Dayton Poly caps paralleling 100uf and 50 uf caps for the 150uf and another 50uf and putting them back into the original wax box for the appearance of originality. The Dayton double (parallel) 3uf caps also fit on the original 6uf box.
  11. lARrybody

    AR 17s

    ADD = Advanced Development Division. Truth in Listening
  12. The tweeters in my AR91 (pn2000029-1) and my AR58S (pn200043-0) are mechanically identical with some slight cosmetic differences as seen in the pictures below. It deffently is possible that the coils and domes are the same.
  13. That tweeter/midrange combo may have been used in other AR speakers. Maybe the AR98ls and 98lsi. Maybe others. I have seen them pop up for reasonable prices. The original tweeters may be repairable with the right dome/voice coil which I see available on the auction site. Eventually something will pop up.
  14. I checked those Korina AR2a's. The corner miters are the same as your Ar2a's
  15. Mundorf Supreme Film Capacitors are excellent. You could go with two 10uf Mundorf Supreme wired in parallel to give you exactly 20uf. My 4x's have Dayton 20uf capacitors and sound excellent. Probably about Fifteen dollars for both. Would the Mundorfs sound that much better. I don't know. I have Jantzen Z-Superior caps on the tweeters on some AR3a's. You could also go with two of them in parallel for Fifty dollars less than the Supremes.
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