AJ1G
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« on: January 06, 2010, 06:44:27 AM » |
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Just came across this link on the AM Forum's EBay list - seems like it should have been posted here instead For maximum effect, turn up your volume prior to starting the video,,,, http://www.youtube.com/watch?v=G7qMVYf85sM&feature=related |
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Chris, AJ1G
Stonington, CT
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N0WEK
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« Reply #1 on: January 06, 2010, 02:51:13 PM » |
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I wish he'd panned the camera around a bit less...I love watching the plates change from dull red to white!!
Nice video though!
That'd make a great AM modulator!
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Diesel boats and tube gear forever!
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W1AEX
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Apache Labs SDR
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« Reply #2 on: January 06, 2010, 06:54:41 PM » |
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I enjoyed that. Nice trippy mercury vapor tubes underneath the main deck. You could almost see the amp grunting as the organ held that last lonnnnnnnnng note! Bet my 833 modulator deck could give it a run for the money!
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One thing I'm certain of is that there is too much certainty in the world.
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AB3FL
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« Reply #3 on: January 06, 2010, 10:41:05 PM » |
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Tons of scrote!
Tom - AB3FL
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W2XR
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« Reply #4 on: January 06, 2010, 10:58:21 PM » |
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Yup, a Philips (of the Netherlands) 1000 watt audio amplifier built back in 1955. Very impressive build quality, typical over-engineered Teutonic construction (although the Dutch are not Teutons!). I think the original application was for use as a driver to a high-powered shake table.
73,
Bruce
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Real transmitters are homebrewed with a ratchet wrench, and you have to stand up to tune them!
Arthur C. Clarke's Third Law: "Any sufficiently advanced technology is indistinguishable from magic".
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flintstone mop
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« Reply #5 on: January 07, 2010, 11:50:32 AM » |
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DAM!!!!!!!  I wonder what speakers were handinling all of this audio? The cam audio didn't reveal that the speakers were crumbling under the SPLs. I'll have to look that CD up and try it at home on my 30 watt system haaa haaaa WOW  Fred |
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Fred KC4MOP
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W2PFY
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« Reply #6 on: January 07, 2010, 12:02:30 PM » |
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I wonder what speakers were handling all of this audio? He's probably is using a 16 ohm 990 watt resistor in parallel with his 8 ohm speaker.  |
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The secrecy of my job prevents me from knowing what I am doing.
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AB3L
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« Reply #7 on: January 07, 2010, 12:12:33 PM » |
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DAM!!!!!!! I wonder what speakers were handinling all of this audio? The cam audio didn't reveal that the speakers were crumbling under the SPLs. I'll have to look that CD up and try it at home on my 30 watt system haaa haaaa WOW Fred He describes the setup in the block to the top right of the video. Expand the message. |
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flintstone mop
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« Reply #8 on: January 07, 2010, 07:14:20 PM » |
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3-phase power to come up with 6kv?
Any guesses what class the tubes are in? They sure are glowing during the quiet parts of the music. Class B? AB1??
The monitor meter is showing the usual average current being pulled by the tubes, I wonder what peak currents were drawn? There was another video where the meters pegged a few times during the loud bass passages.
I liked the driver tubes 6CA7's?
Fred
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Fred KC4MOP
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KB1OKL
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« Reply #9 on: January 08, 2010, 02:05:48 AM » |
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He bought it two years ago on ebay, 160 Euros and 250 for shipping, who says there's no bargains left on ebay?.
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K6JEK
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RF in the shack
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« Reply #10 on: January 08, 2010, 02:22:18 AM » |
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3-phase power to come up with 6kv?
Any guesses what class the tubes are in? They sure are glowing during the quiet parts of the music. Class B? AB1??
The monitor meter is showing the usual average current being pulled by the tubes, I wonder what peak currents were drawn? There was another video where the meters pegged a few times during the loud bass passages.
I liked the driver tubes 6CA7's?
Fred
Klasse-B 1000W-Endverstärker, Treiber: 2x EL34 als Katodenfolger an die Endröhren gleichspannungsgekoppelt, symmetrischer Eingang, Drehstromanschluss Sternschaltung 220/380V. Anodenspannung: 3000V, 250mA Anodenstrom pro Endröhre bei Vollaussteuerung, Ruhestrom 50mA. Which Google translate turns into: Class B 1000W Power Amplifier, Driver: 2x EL34 as Katodenfolger is DC on the output tubes, balanced input, phase current star connection 220/380V. Anode voltage: 3000V, 250mA per output tube plate current at full scale, 50mA quiescent current. So what does "Katodenfolger is DC on the output tubes" mean? |
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AJ1G
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« Reply #11 on: January 08, 2010, 04:55:01 AM » |
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Cathode follower coupling to the output tubes?
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Chris, AJ1G
Stonington, CT
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w4bfs
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more inpoot often yields more outpoot
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« Reply #12 on: January 08, 2010, 10:15:03 PM » |
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So what does "Katodenfolger is DC on the output tubes" mean?
I dunno .... maybe its a kitty coffee maker ....ask Patrick's evil eyed kat |
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Beefus
O would some power the gift give us
to see ourselves as others see us.
It would from many blunders free us. Robert Burns
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w1vtp
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« Reply #13 on: January 08, 2010, 10:23:18 PM » |
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I changed my mind. Gotta use some 866 MVs in my 813 xmtr!! Dang that's mesmerizing! What are those two MVs that came on when he first turned the beast on? The fils look to be exposed.
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W2PFY
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« Reply #14 on: January 09, 2010, 02:01:25 PM » |
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Those look like the 866JR's to me, not to be confused with 866AX'x.
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The secrecy of my job prevents me from knowing what I am doing.
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wb1aij
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« Reply #15 on: January 09, 2010, 06:48:35 PM » |
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The "Applied Mechanics" group at Pratt & Whitney, where I work,has a 10 KW audio amp that is used to drive a large "shaker table to do vibration studies on large jet engine parts; sometimes on a whole engine.I saw it years ago & I remember a pair of 4-400s driving the finals which were 2 large ceramic tubes. The audio output xfmr was about 4 ft cube in size.
They do make some bigguns.
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WA1GFZ
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« Reply #16 on: January 09, 2010, 10:58:56 PM » |
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Space and Sea also has a big one we use once in a while. I'll have to ask about the amp. I never looked at it but my buddy runs the lab. Those big old Ling vibration machines could make some big time audio. My 4CX3000As came out of a ling. I think it used 4 of them in push pull parallel.
There is a vibration table on the first floor under out office is will drive the floor at low frequency operation.
The PDM modulator will drive a speaker down to DC
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