seti
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Posts posted by seti
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4 minutes ago, mike stehr said:
heh
It's the static display version.
A guy ditched on me at an audio meet and greet.
It used a couple of filament transformers to light up the heaters to the tubes for display.
Then it had a plastic hammond case inside mounted on the front, with a Velleman LED control PCB inside, and a couple 9-volt batteries. (with 2004 date codes)
There was a little switch on the back for the LED display.
The knobs on the front are fake...like cabinet knobs screwed in with Allen bolts.
The switches are real, but not connected to anything.
If anything, I scored two dozen fresh input jacks, and ten good tube sockets.
The wood chassis is actually solid Bubinga.
I'm pondering the idea of using the aluminum chassis plate and Bubinga base for an amplifier project.
But maybe shorten the plate and base for a smaller profile.
Interesting piece for the Poverty Audio scrapyard...
That is funny. There was an article years ago with the Foxgate tube surround sound he built for his own use. It looked pretty close to that.
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5 hours ago, mike stehr said:
That is a crazy rare piece.... More info please. Is that his surround sound piece???
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On 11/4/2022 at 6:33 PM, Chief bonehead said:
And that was quite a few speakers! 🤓
And of course except for the Heritage Wireless....
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Heritage is anything PWK had a hand in.
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The Belle looks so cute in there.. Wow.. Talk about dwarfed!!!!!
There is some content that can't sound good because it isn't good. I don't think you can fix it with EQ. I have learned to live with it. These things are true to your source material like nothing else. A good problem to have me thinks. Congrats again. Just an amazing setup.
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I've had both Scott, Fishers, and Sherwoods but my preference is Fishers. That being said you couldn't go wrong with either choice and that is a good place to be 8-)
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I have a massive collection of tube rectifiers so that is what I use. Honestly I love the look of the tubes as well. I like the small MV rectifiers and the GZ34's. I even have some old ST16 bottle shape 81's. If your on a budget or space constraint I could see using SS rectifiers or if ya want dc filaments.
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I'm a freak but I prefer Fishers to most vintage gear especially the El84 or EL37 amps.
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5 minutes ago, michaelwjones said:
😂😂😂
How true. I can't begin to describe my expression when 4 caps in a power supply let go at once. Eyes like saucers would be apt.
Jebus..
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I wouldn't mix and match recrtumfriers as it could go south quickly. For scratch built power supples I like the tv damper diodes ike the 6DM4 as they have a slow start of about 30 seconds. There are so many great damper diodes and pretty cheap. Then there are ancient rectifiers like the 80 81 82 83. Since I have 5 81's I might do a full bridge for a DIY PP2a3 amp. For MV I really like the little 816's.
Its all fun till something catches fire.
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4 hours ago, Travis In Austin said:
Well the Museum has PWK's 351, Transport and mike amps on a bridge. Jim Haynes, a Charter Trustee donated two "for parts" Ampex 350 or 351 (not sure which) that we can harvest parts from. Have Jim show you the next time you are down.
The older 350 utilized metal enveloped tubes like the 12SJ7 Pentodes which were used throughout much of the electronics and only the 6C5/6J5 triode and the 6SN7 dual triode were used in the record circuit driver. The first stage playback head preamplifier tube was also indicated as a special " select" version which all had to be independently tested each for lowest noise before it was appropriate for playback purposes. It also utilized all point to point wiring in the electronics.
The 351 was a huge departure, it utilized the new 12AX7/ECC83 and the 12AT7 dual triode tubes. They were much lower in noise (as all triodes are in comparison to pentodes) and were in small glass envelopes. They were also mounted on those newfangled printed circuit board thingies!
Can you see what we have?
I have my Dad's MR-71, an ATR 102, and a 360? (it came out of our Ampex console we had in our house from about '62 until the early 70)s. It was given to my Dad, they sold for more than most cars cost back then.
I was supposed to go down Friday morning to show Jim a new scanner I have been testing. Work got in the way. I'll maybe make it next Friday. I did some work on a Bogen DB230 for the museum and will be returning it. Nice little piece 6DW5 outputs with DC filaments.
Do we know an expert Ampex restorer? These need a special touch for sure. The PWK mods should be well documented.
Next time I am in Austin I would love to see your RTR stash.
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7 minutes ago, seti said:
Ampex 352.
That is a hell of a job. How many Ampeces do we have that need to be restored?
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7 hours ago, Travis In Austin said:
I'm asking him to sell the horns, donate the cash, and we will get him two 403s that don't have Ron Popiel spray on hair on them. Then we can rebuild PWK's Ampex 352.
Well they would still come form the same place lol..
I'll make a deal with you. You can have all my Klipsch speakers when I'm dead 8-) All donated to the museum unless Stacey wants them lol....
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30 minutes ago, OO1 said:
no one is asking you to sell the horns , but how about loaning the horns for an Exhibit /Event at the klipsch Museum .
I don't display my k403's as they are my daily drivers. They have the driver PWK picked out the B&C DE82TN. Trust me the museum has plenty of K403's. They have some beautiful horns out of bloodwood.. I think. Then they have other examples. Have you been to the museum? They have the consumer V1. It is beautiful. Roy and Klipsch museum already has K403s... It will be fun to see the rare stuff come out for display at the museum over time...
The drivers fit fine. Sound fine. Measure fine. Zako aka Maron didn't give them to me I bought them but wth in my book $500 is a giveaway.
It will be fun to see where this auction ends up very strange....
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I have several amps that use the GZ34. It makes me wonder why could they make this killer rectifier that seems to last forever but now we have trouble just making them stable. I wonder what we are missing in tube production now. I've never killed a GZ34 and don't think I've seen one dead lol... . For DIY I love the damper diodes that are slow start like the 6dm4 or the 6AX4.
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2 hours ago, Travis In Austin said:
You need to put those on Ebay for $25,000 with an ad that says Golden Jubilee Original 403 Horns.
Then in the description, put something like, "for those Golden Jubilee owners who have bass bins but are looking for the original MF/HF horns to go with them, here's your chance!" Add something that you will supply a full and complete provenance with them.
Hell no! I will only part with my K403s on death 8-)
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3 hours ago, OO1 said:
reverse-engineered k-403 horns , the texture of the horns is different , there are no holes drilled , it's a custom made Horn for Mrs Valerie Klipsch
Because Klementovich sprayed them with some crazy texture. It makes no difference in sound.. I've seen their birthplace and they are just fine...
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4 hours ago, capo72 said:
@seti Iain, do you have more info about your mini punches? I gleaned your website but did not see anything. I like the smooth curve and clean look of yours.
They aren't mini punches but JC full tractrix horns. I can't remember exactly 60hz-600hz?? They are among my favorite horns as well.
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12 hours ago, Islander said:
Is that what you meant, or were you referring to the 403 in the first sentence? Or did you think I was saying that the 403 was the better horn, because that’s not what I said. I believe that the 402 is the better horn.
There are different horns with slightly different goals. The k403 needs a little less eq but with the jubilee having a dsp that is a moot point. I like em both. K402 is now on Klipsch state of the art Jubilee is all that needs to be said.
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1 hour ago, Islander said:
From everything I've read on the Forum, the 402 is the better horn, which is why so few 403s were made.
I wouldn't say better as it is hard to beat the k402. Think of the K403 as a k402 with collapsing verticals. The reason I love the horn is it sounds great and has Roy and PWK's hand in the design. Pretty cool. When you hear the new Jubilee it is undoubtedly the state of the art in sound. I've never heard anything better.
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1 hour ago, MMurg said:
Those are the ones.
Here are some pics.
Tractrix on tractrix...
Right out of the mail 8-)
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That isn't exactly what happened 8-)
Klementovich was gifted the Golden Jubilee's by Valerie. They had K403's. There were two pairs made she had the other pair. Klementovich didn't like the "plastic" K403's so he replaced with martinellis. He also didn't like the crossover so he moved it to 750hz which was an odd thing to do. Klementovich sent the K403's to Maron Horonzack. I had happened to contact Maron to talk horns when I had mentioned how much I would love a pair of K403's. Maron said "How bad do you want them?" I was joking and said something like $500 and he said $550 and I'll ship them to you..... Next thing I know I have a pair of unobtanium K403's and I have been listening to them ever since. They are amazing as they are the combinitation of wills and compromises of PWK and Roy. It has Roy's flair and PWK's collapsing verticals. They are my favorite audio item.
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Just got this old Bogen going. It has 6DW5 output tubes and dc filaments. Interesting.
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7 minutes ago, mike stehr said:
I have a Lambda C-281M. 325 volts at 200ma maximum operating voltage. The Hewlett Packard 712A would be nice to have...
A retired EE friend had a tube power supply he picked up when he was an employee at Magnavox...it was older looking unit that uses 6550 for pass tubes.
600 volts at 200ma. I'd always tried to talk him out of it to no avail.
I also have a Lambda LA-100-03BM. Switchable up to 35 volts at 10 amps. An 80–90-pound tank...
It was really a case of paying too much attention to the images I took to reference for rebuilding, and not enough attention to the schematic.
I wouldn't be surprised if these are the original tubes that came with the unit.
That is cool.. It would be hard to build a tube amp power supply as good as HP or Lambda... Great stuff.
My second hobby is restoring test equipment.
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Pictures of your Tube Amplifiers
in Talkin' Tubes
Posted
Nice going from modern production to NOS your distortion went down.... Very interesting.....