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npt3

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  1. Thanks so much for posting, this is so great! I especially love the salesguy dude-ing it up on page 5. πŸ˜‚
  2. Thanks Roy. I inspected the driver surround on this unit, and it looked as perfect as a 55 year old speaker could - and I couldn’t detect any sonic defects, so I left it as is. This one’s become my office radio, so I can keep an ear out for trouble if it ever develops. Saving the goo for future imminent projects. I remain pleasantly astonished at how robustly built and cleverly engineered the KLH and AR products were, to last so long and be so easy to fix/maintain. (I remember spending lots of time listening to music with some girls on my floor in college who had a KLH 24 system. Good times. :))
  3. πŸŽ‰πŸŽ‰πŸŽ‰πŸŽ‰πŸŽ‰
  4. So, I'm having a pause before treating my driver surrounds with Roy C's sealant. Is there any downside to NOT doing it? (I only ask because the driver I want to treat has a really nice, clean and translucent surround that does not appear to be degraded or damaged in any way.) (I know that sealing KLH surrounds is a popular topic, so my apologies in advance for possibly flogging a dead horse a little more.)
  5. I always liked the Braun-like styling of the Model One. I had a Model Two (with the subwoofer) in my office for many years, and I just loved it to death. When I stopped having an office office, I sadly parted with it, but I got to spend almost twenty years with it. A great relationship!
  6. I ordered a couple of the higher quality Panasonics and a couple of the higher quality Nichicons to those specs. πŸ‘
  7. PS I've got a copy of the Service Manual, Kent, thanks!
  8. Eek! My filter caps don't look THAT bad, lol. I'm all about less hum, and the filter cap's easy enough to replace, so: off to Mouser
  9. I'm having second thoughts on recapping. πŸ˜‚ Honestly, the electrolytics look really, really good, not leaky at all like I've seen in some receiver disasters. I know that after 50 or so years they'll "go", but am I just putting off the inevitable by leaving them where they are?
  10. I'm really enjoying my journey of discovery in the Land Of The Twenty-One! Over the past couple of years I've tackled much larger projects (e.g., my Citation Receiver resto), so it's refreshing to work on something more modest and...discrete. It also helps that Henry K. must have cranked out at least as many of these gems as AR did XAs. Anyway, I've got a couple of units now to work with, so I can work towards restoring my 'best' with the cleanest parts, and I'm taking my time with it. I want to first do no harm, but I'm also thinking that while I have access to the insides, I should get my radio ready for the next 50 years by recapping at least the amplifier board. The other thing I want to get in shape is the speaker. I've got a bottle of sealant (thanks Roy!) to treat the surround, and again here, the speaker is working well and the surround seems in great shape (in all of my units) but I'm going to do it and get it over with.
  11. I think I'm going to try the jigsaw technique, Kent. My grille cloth is in really good shape, so it should look pretty great. Where did you get your scrim material?
  12. Roy, is your store still up on eBay? I was looking to buy some sealant to do some KLH drivers.
  13. I had the CL once. I thought it was a far cry in build quality from the 'real' (i.e., pre-Singer) radios (I mean, "receiving systems.") And the clock was indeed crap. My copy of the Twenty-One manual shows the grille cloth to be pretty much all white, i.e., no contrasting accent threads. I have yet to see one where the grille cloth hasn't yellowed, which isn't surprising given that these little guys are pushing 60. Since mine is not working, (I have a working one, also) I think I'm going to use it for some experimentation. Knowing that the cloth has yellowed and somehow shrunk (horizontally) over the years, I'm going to try to very gently remove it from the masonite, whiten it, and see if I can't stretch it another couple of millimeters. I'm going to re-cover it with new fabric (again, as a learning exercise), but it's worth a shot.
  14. I'm thinking of re-doing the grille. I've got some nice Guilford acoustic fabric choices, but the back of the grille (which I think is an earlier manufacture) has a dark, thin, pretty transparent fabric over the speaker opening. Does anyone know what this fabric is called? (in case I need to have some on hand for, you know, emergencies)
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