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Old 17th January 2019, 02:44 PM   #31
spoontex is offline spoontex  Spain
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Okey, I will try, and if I use 6N2P for v1 and v2 a didn't need to change anything?
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Old 17th January 2019, 03:02 PM   #32
Merlinb is offline Merlinb  United Kingdom
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Correct. 6N2P is like a 12ax7 but with 6.3V heater.
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Old 17th January 2019, 03:05 PM   #33
Alan4411 is offline Alan4411  Wales
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spoontex,
Slow down. Just keep it simple please.

You can use ECC83 and ECC82s with that 12 volt transformer.

If you want to use 6.3 volts use ECC88, 6N1P and 6N2P.

Best not to mix 6 volt and 12 volt types as stated.
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Old 17th January 2019, 03:56 PM   #34
spoontex is offline spoontex  Spain
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I think that the simplest way to fix this, are buy two new 6N2P and don't touch any component.

Yes Alan, two 6N2P and one ECC88 runing in parallel with 6.3v

Anyway, I found two little toroid transformers into a box, 230v 12v 1amp.

I can't wire this two Transformers this way?

And of course, use two ECC83 and one ECC82 in paralel with 12v supply.

schematic — imgbb.com

I'm learning, thanks.
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Old 17th January 2019, 04:34 PM   #35
Alan4411 is offline Alan4411  Wales
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Quote:
Originally Posted by spoontex View Post
I think that the simplest way to fix this, are buy two new 6N2P and don't touch any component.
Yes Alan, two 6N2P and one ECC88 runing in parallel with 6.3v
I agree!

Quote:
Originally Posted by spoontex View Post
Anyway, I found two little toroid transformers into a box, 230v 12v 1amp.
Can I wire these two Transformers this way?
I'm learning, thanks.
You can wire them like that,
BUT there will not be enough 'power' to supply both the heaters and the HT supply. Here is why:
The heaters need 5.4 Watts (12v x 0.45A = 5.4 Watts) and the HT needs 7.5 Watts (250v x 30mA = 7.5 Watts) That is 12.9 Watts.
Your transformers are only 12 Watts (12v x 1A =12 Watts or VA.)
Also there are power losses using back to back transformers so say 80%.
You would need 2 Amp transformers (24 Watts or VA) to be safe.

Alan
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Old 17th January 2019, 04:44 PM   #36
spoontex is offline spoontex  Spain
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You are right!!

Anyway, I Will buy two new 6N2P tubes.

Thanks.
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