Davecv41
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Posts posted by Davecv41
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When I bought a 27" Sony TV some 35yrs ago, I kept the box for repacking it for moving. It didn't take long for the termites to find it.
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I kept the old Aerovox, Sprague, and Astron metal capacitors when I updated them in my Khorn's type A crossovers a few years ago. The recent availability of Klipsch approved replacement caps thru JEM got me thinking about keeping the crossovers original, by removing the old capacitor's guts and restuffing them with new plastic caps. Has anyone ever tried this with a square metal capacitor? I've done it on old radios before, but a Gaggle search only comes up with doing it to round electrolytics. Any idea what's inside these square cans?
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I thought B&O was out of business, until I saw a B&O showroom while walking thru SoHo in Manhattan in 2018. The most memorable device there was a round bluetooth speaker the size of a snare drum, mounted at a 45 degree angle on a tripod, for $2700. I was not impressed by the sound. It filled a space with mood music, but that's about all it did.
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On 3/9/2021 at 12:59 PM, schwock5 said:
any recommendations for the switch box? i see a lot of different ones floating around, but haven't seen a lot of reviews/comparisons
I use a 4PDT toggle switch mounted on the side of my stereo cabinet to switch my Khorns between a Sony HT receiver or a 2 channel tube amp.
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Anyone got an estimate what these sold for new in 1979? I spent plenty on stereo stuff back then, and just speculating how things would have been different if I had bought a Heresy pair instead of the no-name wheezers I had.
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I happen to like the older solid state receivers, I wish I still had my old Pioneer receivers from the late 70s. SX-680, SX-780, and SX-1080. My sister and ex-bro in law got the 1080 when I was in the navy, I found out he threw it out when one of the channels quit. I hope he hurt his back lifting it.
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I crashed an after-hours customer appreciation party at their store in SOHO a couple winters ago. Until I saw the store, I thought they had gone out of business.
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I got introduced to sniping by a coworker who said that he wouldn't be bidding if he didn't intend to win the auction. That reasoning made sense to me.
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On 9/8/2020 at 6:57 PM, EmilC said:
I expect them to.
Unless the package is lost, I expect them to weasel out of this any way they can
My wife ordered a Swiss Army watch for me for Christmas a few years back. She tracked it to the UPS main HQ in town, where it sat, and sat, and sat. Evidently, one of the seasonal help temps they hired got it. UPS paid up since it never left their facility.
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2 hours ago, henry4841 said:
Tell members about how they sound to you.
Details have faded over the last 20+ years, but I don't feel this schematic was well designed. I got about 30 minutes out of it connected to a pair of HIIs when the high voltage winding in the power transformer opened. It had been over a year since I ordered it from Antique Electronic Supply, so well out of warranty. I wrote a letter with a copy of the schematic to AES explaining what happened, and got a reply from Mr DeFir, the owner. He analyzed the circuit, and said one winding was overloaded, but the other was not, so he felt the transformer was good in the circuit. (I was in the Persian Gulf at the time, he had been a tron chaser in the navy in WWII, and his son was still on active duty, so it was a nice letter.) I ordered another transformer and replaced it, and got it going again. I have 1967 Khorns, and while the sound was clear, it was not a strong amp, which I partly blame on having to run the high voltage winding thru a resistance to drop it. (The gold ones in the picture are in series, so there was no fighting between unmatched parallel parts.) After several years of listening, it developed a hum, so I shelved it, not wanting to invest the calories in it. When Maynard put out his Lil Sweetie schematic, I took the amp apart, reusing just the aluminum chassis and the Hammond 1615 output transformers. There's probably a couple hours of work left before it's ready to fire up. There are now two mono amps on the chassis.
I am not put off by the 45 tube in the least, in fact, I'm still looking for a better schematic. This amp sounded good.
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My former 45 amp, built on a mounting bracket from a used shipboard keyboard in 1997, schematic was from an article in Glass Audio. The power transformer burned out once, I replaced it, then stripped it when Maynard came out with the Lil Sweetie schematic. Not the best layout here, the parts had to fit the available space.
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On 8/29/2020 at 3:43 PM, CECAA850 said:
Meh. Printed circuit. We all know point to point with silver mil spec wire is where its at.
Unless you're building in an old Lincoln or Hobart cabinet, it's difficult to get a 57 1/8" long printed circuit board to fit. Much easier to figure 8 the wire, and tie wrap it in the middle.
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Measure it's resistance, and the resistance of the midrange on the other speaker. What is the resistance, are they both measuring the same? That's a starting point.
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On 8/14/2020 at 7:16 AM, pbphoto said:
I would ask the stranger to buy me a Stroh's 30-pack, then negotiate down.
Beer wasn't sold in mass quantities back then, besides, handing off a pallet of 3.2 to a kid on a newspaper bike would have attracted too much unwanted attention. We took what we could get; a 6-pack of Mickey's if the beer gods were smiling, cans of Coors if they weren't. Quarts of Miller were considered a score, especially on the way to a drive-in movie.
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21 hours ago, babadono said:
America's craft brewers make excellent grog
When ordering away from home, I always ask the server what's local that they serve. I prefer a bottle then so that I can read the label. Life's too short to drink the mass produced stuff we drank in junior high school when we got lucky enough to persuade a stranger to buy us a six pack at 7-Eleven.
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On 8/9/2020 at 4:00 PM, RandyH000 said:
amazing unit ---------------------50$ is less than the value of 1 of the smaller variacs
I've gotten a couple variacs at swap meets. One was in a homemade power supply. People don't know what they are, or what they cost new.
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On 8/10/2020 at 7:39 AM, JDR said:
Thanks ... I looked at ALK's site .. didn't look hard but didn't see where he sold individual parts, and I think I'll just do it myself ... did see he's might proud of his work ... but maybe he's fine, and just a grumpy old man like me. Crites - who's a good guy by all accounts - wants $118 just for a 2-speaker set of AA capacitors
Since you're doing it yourself, Crites' price for Sonicaps are identical to prices on the Sonic Craft website.
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6 hours ago, JDR said:
Q: does T2A have "taps" which can be accessed to adjust the level / attenuating the Squawker? (love that term) .. having that access would be great for some listening tweaks.
Yes, it does have taps. But all the wires on T2A are soldered onto the lugs. A PITA for checking which tap you prefer, but doable, especially after you gain normal access to the backs of those speakers.
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5 hours ago, Ceptorman said:
My wife is a teacher, she will need a job. My daughter just started her second year of nursing school. So location is very important. Do I stay close to work or move away to save on housing? I would like to stay west of the city, maybe close to the water...but $$$
What would moving do to the wife's retirement plan? Would she lose much, or all, by relocating, and having to start over, needing to work xx number of years before becoming vested in the local school's plan?
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I've heard for the last 3 decades the "they don't build them like they used to" about couches and chairs. My wife liked our stuff, which varied between 25-65 years old, but thought the colors were outdated. They had good construction, so we kept them. She now wants to have my favorite stuffed chair redone, which is also 65 years old. I've found my preference in cushions has changed as I've gotten older, now the firmer the better. The couches and loveseat got updated with firmer cushions.
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3 minutes ago, Shakeydeal said:
But surely you aren't saying that two amplifiers from different manufacturers with identical power ratings that measure the same will sound the same?
How about two preamplifiers? Or two cd players? I'm not even going to bring up cables, that's a discussion for another day.
Shakey
I was just spouting my opinion on drivers. Amps, preamps, and CD players ( with digital to analog converters) are all analog electronics. Every component affects every other component in an analog circuit.
Cables? That's for another thread.
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29 minutes ago, Shakeydeal said:
but everything that can be heard cannot be measured.
Shakey
Having worked in the semiconductor industry for a time, I learned that if you can smell it, you can measure it. Particles that go past your olfactory nerve and tell your brain that there's something there, also can go past a sensor and get measured and analyzed. A sound wave, which is energy, goes into your ear and tells your brain that there's something there, should also be able to be measured, and analyzed, and determination made that if it wasn't there initially, why is it there 300 hours later? Or if the measurements didn't change, but your ears think they did, then why? I understand that materials loosen up and take a set after a while, but I'm still not convinced yet.
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I had 2 chairs, couch, and loveseat reupholstered not long ago. The fabric shops have craftspeople they use, so ask them, as they'd know who does better work than anyone else in town. Especially with leather.
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Lots of good points, including things I hadn't thought about before, like @joessportster comment about needing to start the breakin process all over if a speaker hasn't been used in a long time. But, I'm still skeptical about breaking in. Speakers are make from components, which are designed to specifications, then tested after manufacture to ensure they meet those specs. Since that is measurable, is there anyone doing before and after measurements on drivers after xx number of hours, to see if those numbers have changed? Is that something that PWK would have thought of and documented during his long career?
What impacts the effective life of a capacitor?
in Technical/Restorations
Posted
Surplus Sales of Nebraska has a good sized listing of those old bathtub-style cans on their site. FWIW, earlier this year, I replaced a bathtub style cap in a piece of equipment at work. It looked identical to the caps I replaced in my Type A crossovers. I should have kept the box that the new one came in.