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  2. I find it amazing that after so many posts a lot of advice was given without asking a very important question - what amps are those? I mean manufacturer, model... Another interesting fact is that the discussion was about the technical characteristics of the rectifiers (some of which are current production, therefore quite approximate in their ratings - if I may). The accent was not given on the sound said rectifiers will impart on the amps. Once I know the application, I can give advise - which of course doesn’t seem be needed in this thread - as the OP has already procured some replacement rectifiers?
  3. People must understand that wearing a mask in public is to protect others, rather than an indication of your own paranoia. The best quality masks, such as N95s should be kept available for health care workers, but cheap dust masks, like the 10 pack from Dollar Tree on the left in the photo, should be used in public. The CDC, Dr. Fauci, the Surgeon General, and every other intelligent and informed science driven expert recommends that. Only a selfish narcissistic individual who believes a desk can be resolute would ignore those recommendations.
  4. Today
  5. Again some OP generated thread drift. Did you watch Jeopardy last night Rich @rplace? I thought of you my friend. One of the clues was the first few bars of The Victors; no words, just the music. No one rang in. I was surprised, but not as surprised as Alex, but after all, he’s always surprised no one gets the many Canadian trivia clues.
  6. My curiosity compels me to ask for the back story if you don’t mind. In what speaker did you play them? What replaced them? Never mind. The luxury of time provided by social distancing prompted me to search your prior posts which brought me to this. What happened to the stock La Scala cabinets and other components? The K33s seem to be the last of the original La a Scala components. Too bad you can’t reassemble the La Scalas and sell them.
  7. Ok, I guess I had is right originally. I've been going back and forth between two threads and three members and I'm getting all mixed up. There was the KLF-30 thread with Alexander and jjptkd and an a55, and this one with dtr20, and I'm not even sure who I was answering about which experiment! You know, you were there. I owned a pair of chorus II's from 1992 to 2005 before I sold them due to moving into a smaller place. I experimented with them extensively, including mounting the mids and tweets on a stand and using a pair of 10" sub woofers for the bass! I re-did the crossovers externally in a wooden box with a Lexan top and I by-wired them. I also coated the midhorn with a thick layer of spray on rubber, and replaced the connector tabs on the woofers with gold plated 5 way binding posts. Nothing I did ever made them sound any better because they already sounded amazing. I learned a lot, but I never even once felt the need to change the drivers.
  8. I will soon put my K33E woofers for sale so I decided I would put them here first They were bought new about 10 years ago and Never abused (home listening) they are perfect Location is Brussels, Belgium if interested, pm me!
  9. To my knowledge he has never considered it for use within a Klipsch design? Upgrade or otherwise?
  10. The K61 designation is for a horn/motor assembly... it utilized the K52 motor (diaphragm/magnet)
  11. By endorse, do you mean that he no longer considers its use in new or updated designs?
  12. In other words, now transform the RH84 original schematics into the rev2 schematics - but don’t forget to create enough voltage drop on g2 because it is not good to have the g2 of the 6V6 at higher than 250V - thus the 21V zener should become a 51V zener... Matt has really done a good job at copying my schematics... and flaunting it as his own. Even the advice on possible substitute driver tubes (i.e. 5965, or 6AU6 and EF86 as in the RH84 Parallel Pentode Edition).
  13. Same thing realistically... nomenclature gets a bit funny at a point but the K52 motor was used with a threaded snout and with the the K701/K53, K601/K57, K602/K61/K62... it’s late, I forget how it all lines out completely but there are horn part #’s that mate to that motor and assy #’s that utilize the motor in one form or another?
  14. Sorry, wrong driver. I was trying to comment on the subject of this thread, in which the OP swapped the chorus II driver with an a55g. The Chorus II mid driver is actually a k-61-k. The focus of my comments was supposed to be on the merits of doing these experiments as opposed the merits of specific drivers, but I did a bad job of it.
  15. Wow... well, take a look at this: Do you recognize it? Unlike the fake RH84 with 6V6 tubes, this one is the original so many people around the world built with success - and it did cause a lot of stir everywhere due to conflicting opinions and interests. This picture was taken from Tom McNally’s site, he built at least one. The schematics has a mistake - the choke should be 100mA and 10H are enough for decent filtering.
  16. Roy does not, to my current knowledge, endorsed the A55.
  17. do you mean the K52H heppner ---or the K52-k53
  18. And it works for many manufacturers - but it is sub-optimal. If everyone did a perfect job, this would be a perfect world. It depends on the application - hun would be painfully audible with efficient speakers, or if not masked by other issues (stronger ground loops, inefficient PS filtering, hum from direct heated tubes... and a lot of other hum/noise/buzz sources too often neglected not only in DIY but products as well).
  19. the Klipsch K77 , EV T35 tweeter had some versions made during a period of time with Beryllium leads ---good for sound , but bad for the technician that welded these all day long
  20. steelbooks only Specifically looking to acquire these 4K steelbook titles. New or used. Undamaged. Guardians of the Galaxy Vol.2 Spider-man: Homecoming Thor: Ragnarok Black Panther Ant-Man and the Wasp Spider-man Far From Home Thanks. Send a PM anytime. If you read this, I am still looking.
  21. I'm pretty sure the a55g, properly implemented, will out-play the k52. But can any of us implement the a55g into an existing design which used the k52, better than Klipsch has done with the k52? Maybe. Can we do it by playing swaptronics? Doubtful. But here's the thing: This is where it starts. At some point even PWK had to get all the mistakes out of the way. At some point our learning will involve making changes for the worse. In my 35 years of building speakers I've made more mistakes than successes, but I've learned a lot and have enjoyed my life more because of it. One thing I know, I'd love to be allowed into the rooms where Roy keeps all his projects, failures, and works in progress.
  22. A better advice would be NOT to have 3 grounding points to the chassis! You should have only one grounding point. If you measure the voltage between these points (AC, mV range) you will understand why. That is the source of hum, and the more sensitive/efficient your system is, the more painfully you are going to be aware of it. All ground should flow to one point, either as a star or as a bus - and if you are earthing your chassis (connecting to mains earth) this should happen in the same point as all the grounding.
  23. ebay is dirt cheap
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