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Is this it?

If You wants decrease +U to 100v, You must change 47 ohm to about 800 ohm/50W and You will have really Oven....
Also grid resistors 12 kohm ....to 1 kohm
Both plates are shorted!

In the place of the 6l6 I would like to use a EL37 that I have, it should be ok?

azazello wrote:If You wants decrease +U to 100v, You must change 47 ohm to about 800 ohm/50W and You will have really Oven....
Also grid resistors 12 kohm ....to 1 kohm
Both plates are shorted!

Well winter is nearly here and petrol is expensive so I can use it as a heater.........LOL

OK like this ?

6B4G wrote:

azazello wrote:If You wants decrease +U to 100v, You must change 47 ohm to about 800 ohm/50W and You will have really Oven....
Also grid resistors 12 kohm ....to 1 kohm
Both plates are shorted!

Well winter is nearly here and petrol is expensive so I can use it as a heater.........LOL

My rough estimate to drop ~100V with ~80ma current is that you'll need a 1250ohm/35W resistor.

Yes. /but still both plates are shorted!/

Sorry this should be better.

kheper wrote:

6B4G wrote:

azazello wrote:If You wants decrease +U to 100v, You must change 47 ohm to about 800 ohm/50W and You will have really Oven....
Also grid resistors 12 kohm ....to 1 kohm
Both plates are shorted!

Well winter is nearly here and petrol is expensive so I can use it as a heater.........LOL

My rough estimate to drop ~100V with ~80ma current is that you'll need a 1250ohm/35W resistor.

All Your current for both channels is about 160 ma....Power of resistor must be 2-3 time more than counting...Grid res. of EF184 must be 1 kohm.

I'd go with a 100ohm carbon resistor strapped from the screen to the plate of the EF184 or get a real triode.

azazello wrote:

kheper wrote:My rough estimate to drop ~100V with ~80ma current is that you'll need a 1250ohm/35W resistor.

All Your current for both channels is about 160 ma....Power of resistor must be 2-3 time more than counting...Grid res. of EF184 must be 1 kohm.

Good catch. For some reason, I thought he was building mono-blocks.

100 / .160 = 625ohm

400 * .160 = 64W

Due to it being a new build there are many options that can be made. It is not necessary for me to use the EF184 I can use anything as I have lots of tubes to use.
You guys seem to know your stuff quite well and I'm absorbing the knowledge.

Why would I put a 10K pot?
I will be using a preamp.

This schematic is enough to direct switch to input CD, DVD, receiver, Cassette deck, Iphone, CDman, RIAA....
What kind of pretubes You have?

ECC83
12ax7
12au7
ECC81
12AY7
12B4A
EF86
CV4003
6DJ8
6SN7
6SL7
12SN7