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Everything posted by DavidDru

  1. DavidDru

    Allison one Crossover parts

    I am going to order what I need for updating the crossovers on my Ones. This is what should be in there, though I have not opened it up yet. Caps: 60mfd (2) 35mfd (2) 6.2mfd (2) 3mfd (2) resistors: 4ohm (4) 3ohm (6) 1ohm (2) Looks like I can get most everything in the Dayton 1% caps from Parts Express. The 35uf will need to be 2 put together so I picked a 15uf and a 20uf. Make sense? I am thinking to just go with an NPE for the 60uf to avoid that big cost for a Poly on that. ? Also, there are 12 resistors in there so the Mills start adding up. What is the best alternate? They have the Dayton Precision Audio Grade Low inductive and standard wire wounds.
  2. DavidDru

    RDL Acoustics F-1

    Picked up a great pair of RDL Acoustics F-1 this weekend. A mere $80. All is good with them. May need new surrounds on the top woofers. They are in-tact but in that stage of where it seems like you could put your finger through them. No biggy. Great cherry finish and overall styling with these, which I think Roy A. was pretty good about over the years. Currently being driven by my fully restored Pioneer SA-9100 at 60/ch. I will put them in the main system where I can go 240/ch SS or 35/ch tube and see what they do. They seem a little in want of power. Love Roy's tweeters. I feel fortunate to have a pair of these as they seem rare as hens teeth these days. They proudly join My Allison Ones in the collection. Hey from the Mountain Pacific Northwest!
  3. Shockingly good after a recap and new surrounds on mid and woofer. New trim pads on tweeter and mid that I got from Glenn. WOW! is all I can say. I have them in my 12' x 12' room hooked up to my WOPL 400 (230/ch) SS amp and tube preamp and they absolutely jump out at you and image great. Really good detail and the bass is all you need in this room at all levels. Also tried them with the Dyncao ST70 and now with a The Fisher TA600 tube receiver and those do well with them also. A bit more gain is required of course. I used Dayton 1% poly's in the recap. Will probably go back in and replace those darn AR binding posts. Damn things drive me crazy! Next up though is fabricating some new grilles. Going to go with the raised beveled edge like Glenn did in his. I may contact foamspeakergrilles to see what they would charge to make some up like I have for some big Altecs. I am full in on looking for AR11's or 10pi now.
  4. DavidDru

    Slightly sad AR-7s

    Yikes, those woofers. Not sure they can be salvaged. Just gotta hope the glue isn't as strong is it is ugly. I would start by separating the surrounds at the edge of the cone and removing all of that through the frame first to make it at least seem manageable. May want to make sure you have operation tweeters first though, and if you don't, I'd be calling it a day with those and maybe the remaining tweeter and badges being of help to someone else. I've got an AR7 woofer sitting here doing nothing but taking up shelf space that I could send you, but shipping would just make that prohibitive.
  5. DavidDru

    Okay, these AR12 are awesome!

    thanks guys. glenn did his grilles which inspired me to maintain the bevel on mine. It was difficult at best until I got access to just use the CNC. Glenn I believe went with 1" wood pieces but I went with the 3/4" BB ply to give it a bit more strength with consideration to those narrow pieces over MDF. With the velcro they end up nearly 1" out of course. Since these were CNC cut, I suppose I could easily cue up more if anyone is in need of frames. I can ship pretty inexpensively too. Let me know. Again, I miss 10" and 12" woofers.
  6. DavidDru

    Okay, these AR12 are awesome!

    Finally got around to doing the grilles on the 12's. I've been off messing with other stuff including some ground up builds so since I have access to the CNC machine I went ahead and cut out new grille frames. Had some 3/4" baltic birch that seemed a good way to go since it was going to be painted anyway.
  7. DavidDru

    Ar-3a Capacitor Advice

    First time checking in here to CSP in a while and it feels like I never was away. Love me some caps debate. Cool. Use whatever you want. Good catch by RoyC on the surround there. Roy keeping his eye on the ball. I'd reorient the coils too.
  8. DavidDru

    Greetings of the Season

    Happy Holidays folks! Here is an initial one. Just finished restoring this Fisher tube console.
  9. DavidDru

    Museum Grade AR-2a

    Wow, yeah nice. Looks like they've been put away for a long time.
  10. DavidDru

    Any Interest in AR-38B?

    I was given four of the 48b's. All surrounds needed attention. So far I got one set up and running and sold to my neighbor for $100. Two had spring terminals. Two had 5 way posts. They sounded good. But yeah, the finishes used are disappointing for sure compared to the AR's that came before. Could be cool to pull the vinyl and do a little real wood veneer on these.
  11. DavidDru

    WTB - AR 4x cabinet

    I have one nice full 4x in Walnut, and a 2nd that has a beat to hell cabinet not worth restoring. The parts are all good so I need a replacement cabinet if anyone has a nice unmolested empty one they can get rid of. Thanks!
  12. Pete, you still selling this stuff? I tried PM you but it said you can't receive messages. ?
  13. DavidDru

    Roy's listening 9 vs NHT 3.3 vs 10Pi

    Really interesting. I am glad this came back up. I've been thinking a lot about speaker size and room matching lately. I think this was brought on by my discovery of how good the Ar12's did in my main listening room combined with the feeling that sometimes my much larger AR9's and ADS L1590's overpower the room at higher volumes. Too bad the 10pi did not stack up well against the others, and for interesting comments on the mid range SQ. It sure would be nice to have a more recent or modern build of an AR12 or 11 to try out. Something with a 10" or even 12" woofer but with improved midrange and tweeters. Nobody makes them! Especially in the old standard rectangular box format of the AR3 iterations. Maybe the ultra expensive Harbeth 40.1
  14. Maybe you guys can help me make sure I get this right. Shouldn't be difficult but there may be some things you might offer up as I go here. As you may recall from my AR9 thread, while the 4 woofers all worked, they had been refoamed along the way. Rather oddly as can be seen in the photos. Almost like they put them on upside down just to get them to fit. Must have not had the correct surrounds. I removed the old surrounds on 2 of the drivers last night. Came off fine, but I will scratch at the edges a little more maybe. I like to use a dull exacto blade to help as I go. Since these were replacements they weren't as deteriorated as we often see when removing old foams. Plus it's the 2nd coat of glue. Otherwise these cones are pretty tough and I really wasn't worried about them as I went. I dont think I want to use rubbing alcohol pr acetone on the cone edges unless you guys think I can. They are pretty smooth now. You will also see the staining on the cone of the one as well as the associated surface corrosion on the frame that I will have to clean up. Would still like some ideas on how to clean the cones if possible. The woofers on the AR9's are of course down low on the sides of the cabinet and these no longer had the grilles so were exposed to lord knows what. Could even be cat urine although no smell. Now I also am wondering about the cardboard ring that is attached to each frame. I assume those are not supposed to be there? Something the previous effort added to make those other foams fit. Both rick Cobb and Tom at myaudioaddiction have the correct surrounds for these and both suggest using the test tone for centering so you don't have to get into the dust cap and coil. I have had nothing but great results with that in my other refoams. Btw, these all tested good at 2.8- 3.0 ohm
  15. DavidDru

    AR 11" woofer driver refoam (AR9)

    Been too long ago now Pete that I can not recall.
  16. DavidDru

    Okay, these AR12 are awesome!

    Grab em if you come across them for sure! Replacing the surround on the mid and the trim pads around the tweeters and mids make the restoration a bit more work, but well worth it. I really like how the cabinets look with the thin edges too. I will post photos as soon as I have the grilles done. Time to find the 11 or 10pi, although these are probably all I really need in my room with the quality and power of my amplification.
  17. DavidDru

    Okay, these AR12 are awesome!

    I think the surrounds are already there Glenn! Thanks for the trim pieces for the tweeter and mid. They look great. Whatever the adhesive was on the originals is some tough gooey stuff. Now to do the grille frames.
  18. DavidDru

    Okay, these AR12 are awesome!

    Great idea Larry. In fact I did do just that last week on a connection to a pair of super tweeters I added to my Concert Grands. Early ones for me too I think. They are some sort of metal. I didn't do the bypass caps. Suppose I could have since I have those little caps here for that.
  19. Excellent. If you ever see a nice pair of KLH Model 17, 23 or 6, give those a try as well.
  20. DavidDru

    AR3 with no finish. Where to start?

    Welcome Richard, and nice find for sure. Some of the best surviving examples of AR's are turning out to be ones that had been used in applications similar to what you found with these. Preserved in other cabinets or up on shelves. I have AR2's and AR5's that were in cabinets and are now great unfinished specimens. Personally I struggle with the unfinished cabinets versions. I know they are a bit more rare which can translate to higher collector value, but they just aren't very good looking. ? Nor does any finish you can put on them do anything for me. Mine get no use because of this aspect. Without the collector value thing, I'd probably go ahead and do a great wood veneer on them. Doesn't take away how good they sound of course and they are fun to restore (well, maybe one AR3 restore is enough). Good luck with it. My guess too is that the pots are the only issue, especially if they sound good now.
  21. I bet the AR12 would be nice. Mine are hooked up to considerable SS power right now but I have a restored Dynaco St70 sitting next to the SS amp and I will switch it over to that today to check the difference. I also have a recapped and restored The Fisher TA600 receiver I can try with them.
  22. DavidDru

    AR12's Restored-A few Pics

    Lucky once again and acquired a very nice pair of the AR12's today from the one and only owner since he purchased them new for 10% off list at $450 in March of 79. The purchase receipt and brochures and manual all come with these so that is cool. Serial numbers are 2 numbers apart. The cabinets will require very little work but new grilles are needed. All the drivers interestingly enough are factory replacements. He told me he thought he had them replaced around 1990 and right before they were no longer available. Phew! All of these drivers need the usual age-out attention, but all work. Woofers just need new surrounds as do the mids. Tweeters and mids need the outer plate foam pieces and I hope Glenn can help with those. Hey buddy. Will get a recap too of course. 40, 20, 10 and 6. The ferro fluid thing is interesting. I recently replaced the ferro fluid on some KEF104/2 and it was pretty straight forward easy as long as you know the amount. Check out the photo with the teledyne acoustics sticker on the bottom of the rear plate and how it was meant to cover the AR logo. I hope I summarized the approach well enough. I gathered together this strategy after reading various threads on the 12's here and at AK.
  23. DavidDru

    AR-12 crossover

    Well, outstanding timing as i too need it to know what value caps I need to order for the 1's I picked up today.
  24. DavidDru

    Avid Model 230's here

    Went to pick up some AR9 drivers at a local sellers house yesterday and he had a pair of 230's in really good condition he is wanting to sell. Researching them they look like pretty good speakers.