New German Mega Amp

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NO MORE NEW SUPER AMPS! :gethim:

my wallet can't take this anymore :lol: :LOL:
 
glpg80":f8fnzfzu said:
if the tube is rated at an output of 1,650W at 3kV for strict class B bias, but the amp is only rated at 100W class A, 800-1kV sounds about right. 20mA was a rough guess based on the PT size - could be upwards of 80mA but i doubt it at 1kV. you still have to supply 10A of current for the heater filaments in that tube alone.
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I just thought you'd like the notes as this tube, which unlike most tubes common to git amps, it is not found inside common receiving tube manuals.
The big and comparably only limit with this tubes power OP, is the size of your trafos. My tube curves for 833 indicate possible plate V from 180, to typical @ 1500VDC. The flattest curve, I mean really flat, using B+ from 1500 down to 300. Rather than reinvent the wheel, if you'd like the dope on SE class A operation of the 833, please see here:
http://www.tubelab.com/833SE.htm
200Wattsa-2.jpg
glpg80":f8fnzfzu said:
You have to question sanity at that point. Guitar players who accidentally touch something they shouldnt will be killed instantly at those voltages and currents not to mention the power that is wasted as heat.
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Over all I like the look of the amp in the sense I'd like it on a shelf somewhere, but I'd never wanna carry it to a gig. I’m all about small tube combo with multiple stages of preamp gain.
Guitar players, indeed as picky as they can be,
should learn to not touch plate caps and stuff.
This is old news, when will they evar learn?
Maybe if they did there would be even more obscure amps to play.
I could illustrate one advantage with my 807 and 6bg7 collection.
But then I'd have to dig them out:
SD053.jpg

But these tubes are like 6L6(same curves),
yet handle 800 volts on the plates, because of the plate cap.
glpg80":f8fnzfzu said:
Great concepts but not with the technology we have out today. There is a point of diminishing returns - IMHO that crosses it
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Yet very purdy in it’s own way.
 
Digital Jams":3tag54e6 said:
running class A should bring the electric bill up a tad.
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Just a bit.
These AB1 P/P 833 mono blocks only run about
$175,000
a pair:
IMG_2659_2_smaller.jpg

I don't think the cost of anything would be a factor after the purchase.
 
Digital Jams":v9wfzlrd said:
Quick glance that tube should be around $120-160 bucks but my search was limited and short.

The low end on that amp is insane and running class A should bring the electric bill up a tad.
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lol, imagine that. plugging in everyday and the bill shoots up $100 more per month lol.
 
I remember talking about that amp Matt .... the pizza oven / amp. Ton of clean bass / cooks large pizza in 8 minutes.
 
stephen sawall":13qpfmof said:
I remember talking about that amp Matt .... the pizza oven / amp. Ton of clean bass / cooks large pizza in 8 minutes.
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:lol: :LOL: :thumbsup:

Yes those topics still exist in Ann's bowels somewhere. I forgot how long ago they were but some of my notes are in there during the design phase. I remember calling to get quotes for PT's and it just was not happening.

MOOAH yes i do appreciate the quick spec's - GU81's were originally 50-56Mhz carrier freq tubes back from the military hay-days. Not sure what 833's were/are. GU81's are only NOS stock, they are no longer in production and run a pretty penny - $250-$400 per tube but last a very long time. I always thought triodes had a sweeter sound to them - always liked the pentode type design better for more round-ness. I have a sweet spot for old Mil-spec transmitter radios also. Smells and sights and they just look cool.

I never had the chance to fire a transmitter tube up and build a DC supply or figure out the best way to modulate the grids either transformer isolated or through tubes. Still wanting to invest in a few bench power supplies, have been dabbling in the automotive bit as of late. Oh the toys :inlove:
 
glpg80":3p7oop7n said:
MOOAH yes i do appreciate the quick spec's - GU81's were originally 50-56Mhz carrier freq tubes back from the military hay-days. Not sure what 833's were/are. GU81's are only NOS stock, they are no longer in production and run a pretty penny - $250-$400 per tube but last a very long time. I always thought triodes had a sweeter sound to them - always liked the pentode type design better for more round-ness. I have a sweet spot for old Mil-spec transmitter radios also. Smells and sights and they just look cool.

I never had the chance to fire a transmitter tube up and build a DC supply or figure out the best way to modulate the grids either transformer isolated or through tubes. Still wanting to invest in a few bench power supplies, have been dabbling in the automotive bit as of late. Oh the toys :inlove:
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Glad you liked, pretty impressive. I love monster tubes, they put on quite the light show with the bass pumping out at high volumes. The 833 was mostly used in the final stages of most smaller Am stations. Very popular back ~50 years ago.
You know it's almost funny how the HiFi market goes in cycles. Over the past bit all the new big $ shit is SE triode but I'm pretty sure with speakers getting smaller and less efficant there will be a call for more power again soon.
My fav tube for small stuff is the 6GW8, has a driver and OPT all in one, much like the better known and slightly larger 6BM8. So you could make a Champ style amp using only one tube, of course with SS power supply.
I'm actually big on anything old, which sure saves me some cash cause most of what I use today if I didn't build it myself, I bought it long before the prices went crazy.
Oh, and here's a pic of some old Mac amps, in fact, the very first Macs. They use the 6bg6 I mentioned earlier:
MAc.jpg

and here's a pic of a 807 PA I turned into a guitar amp,
807.jpg

for those who keep their fingers off the HV.
 
:shocked:

Damn that is one crazy design, I love seeing different technology outside of the norm being used in tube amps! :thumbsup:
 
i remember working at a radio station back in the early '80's. every time the weather looked like it was going to be severe i'd have to fire up the filaments on the old am tube transmitter and use the remote switcher to dump the antenna load from the ss am to the tube. i think the filament warm up time was three minutes iirc. it could handle the surge from lightning while the ss would get knocked off the air. weenie roaster indeed.
 
1big1":ypqt8zsy said:
i remember working at a radio station back in the early '80's. every time the weather looked like it was going to be severe i'd have to fire up the filaments on the old am tube transmitter and use the remote switcher to dump the antenna load from the ss am to the tube. i think the filament warm up time was three minutes iirc. it could handle the surge from lightning while the ss would get knocked off the air. weenie roaster indeed.
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I've heard the primary backup systems on the B2 bomber uses tubes, seems the EMF after they drop the bomb would take out most ICs and stuff. Not sure if this is true, but it sounds good, minus the bombs dropping that is.

I've got some pics of old transmitting tubes back in the 50s. Nothing like anything I can find on line, these things were 4 to 6 ft high and had like huge water cooled pipes running into their base. I may jsut have to hook up my scanner and share, it's hard to imagine a tube as big as people :)
 
the emf pulse from a nuclear explosion would probably cover a wide area. outside of jamming frequencies they also developed an he pulse round that can be fired from tanks or artillery for limited objectives. it's basically thick copper wire pressure wrapped around the he core. forgot some of the specifics about it.. but it too would be a blast. :lol: :LOL: :thumbsup:
i'd love to see some of those huge tubes. i do remember the tubes in the am transmitter at the local station were probably a good ten inches tall and four inches or so in diameter. don't remember who the manufacturer was.. could have been gates.. or ge.
 
emerson makes alot of those trans tubes in a triode package.
 
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