HUGE CAGE FOR A HUGE TRIODE

Started the box.

or not box really.

I's cage.

in aluminium plates

just stacked

each time you add a layer.

with the electronics in between.

Took a lot of 3D thinking and fiddling with my cad program.

Also found out that the foot/holder is no good.

at all.

took me about 20 hours to make it..

back to the drawing board for that.

anyway.

The cage for this beast, this huge triode.

Obviously became huge too.

Only 1 hole missing

1 of 277 holes...

not too bad

2001 A TUBE ODDITY

did the drawings.

looks spacy

I like it.

In anodised aluminium...

The socket and all the electronics

Finally got the socket done.

It weighs about half a kilo.

That's one pound for you guys at the other side.

Including the copper contacts.

Machined out of a solid copper bar.

Just to imagine the size, I put my mobile next to it.

It is NOT a toy or scaled version.

No.

And the electronics come down to this.

Almost nothing.

11 components per side.

That's it.

The ultimo penultimo diagram

The cathode follower.

Now, that was easy....

As promised; THE DIAGRAM......

only 10 components left...

Does it get better than this?

Well, things are never as they seam

Got the interstage!

It sounds funny...

Measured with the scope...

Not so nice.

It has a nasty dip in it.

Tried about everything.

And then some more.

Back to the drawing board.

Asked Wim for help.

Brilliant idea!!

The Cathode follower.

No interstage, no couple capacitor.

Back to DC.

Ok, the power is down a bit.

Only about 20W left.

Still more then enough!!

Oh my God-Zilla!!!!!!

got the interstage, Jörg worked over the weekend

got the welding power supply (fan makes too much noise, must find something else)

switched it on.

ran it into a resistor.

it runs at 800V 100mA

measured sine waves with the scope and things you generally do

so far so good.

the OPT makes noise too.

that got me worried a bit.

Put an OB on the output.

No noise at all.

no 50Hz, no 100Hz.

Pure silence, amazing.

Maybe something wrong with it.

What the heck, put my Ipod on the input.

I played some Morcheeba.

Pure, no clipping, no deformation, very, very smooth

measured peaks at 26V RMS in 6 ohm, there is some bass in this music, yes....

that is 26 x 26 / 6 = 112W!!!!!!!!!!!!!!!!!!

112W SE!!!!!!!!!!

MEASURING

That's 150mV in, 15V out in the driver stage...

1.6mA in the input stage, 30mA in the driver

measured in a toroidal "interstage" transformer in the plate line.

I know that you don't do that, thanx.

I get a max out from the driver of 100Vrms at 1V in.

Now, that is more than enough!

The problem

the first one.
After the destruction of some resistors.
I was going to use AC for the heater.
16.5V 15Amps.
And I thought that there would be no 50Hz problem.
We all make mistakes.
There was an ENORMOUS 50Hz, well 100Hz actually.
So no AC.
A DC power supply.
Built one, heavy, lots of capacitors.
And fuses.
No good.
So now I'm waiting for a 100Kh switching power supply.
And on the diagram you can see the soft start.

Then there is the coupling.
DC, maybe beautiful, definitely doable but I need to burn another 100Watts or so to match the DC levels.
A capacitor, no.
I didn't like it from the beginning.
Ari told me why, and I'll stick with that.
Not a whole lot of other posibilities left...
An interstage transformer.
Jörg.
Waiting for that too.

THE DIAGRAM

Power supply with the "economy mode" switch

Well preliminary, that is.
But it will look very much like it.
Not 100% sure about the supply voltage for the RS607
Something a bit under 1kV, to keep it safe for the kids ;-))
Not 100% sure about the bias for the grid either.
Depending on it's value you can have more or less maximum power.
But it also means more plate current.
I'll probably make a "turbo" switch.
off 20W SE
on 50W SE

and call it the energy saving button.

Designing...

Joachim sees it like this

Or since these things are so absolutely enormous...

Just put some feet under it

Then you get 2 of these bedside tables....

Which weigh about 50Kg each.

Probably more, come to think of it....

made some curves..

.

nothing on the net on the RS607.

n o t h i n g

a t

a l l

I finished measuring when my Ra exploded....

It got so hot that the solder connection melted...

then one of the 2 1K2 25W undid itself so the other one got a bit of a shock...

and got very hot

and just exploded

spectacularly!

RS607 or Tubezilla

Look at this!!!!

This is BIG

Godzilla under the tubes.

A triode.

Made by Telefunken.

Thanks Peter!!

This needs to be an AMP

Made some copper little connectors...

About a kilo of them.

Copper soldiers

Switch it on.

This is not a light affair...

One tube needs 16.5V at 15Amps.

Thats a quarter of a kW

Found 3 5V 15A transformers.

All in series.

There a preheater in the form of a 100W halogen bulb.

ON!

Beautiful!!

Hot!

And yes, you can save on other lighning features.

.