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pilovis 13th January 2012 09:45 PM

Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
My new project

The performances are incredibly good in spite of such a low supply voltage.

Tubes: one 12FQ7 (or ECC82 with lower gain) and two PL504


ECC82 - 12FQ7

dhaen 13th January 2012 10:03 PM

Interesting concept. What are you using as output transformers? I wondered about 100v line transformers...

Edit: of course they're not gapped doh...

pilovis 13th January 2012 10:07 PM

You can use Audio Transformers 600/8 ohm impedance (best results), or if you accept a little bit more distorsion and lower bandwidth, you can use line transformers 220/24 Vac not less than 35W power each.

DF96 13th January 2012 10:10 PM

Sorry to be dumb, but what is the point? You wanted to run a valve amp from the 24V battery supply of a lorry?

pilovis 13th January 2012 10:15 PM

I use it connected to my laptop that has 24 Vcc power supply.
Laptop tube amp.
It still works quite well at 19Vcc (Acer Laptop), but it is better to use a dedicated laptop universal power supply at 24Vcc.

pilovis 13th January 2012 10:19 PM

you could also use it at 12Vcc with a CC 2 CC car voltage doubler (12to24)

gcwills 13th January 2012 10:33 PM

Well done Pilovis - Creative approach with your amp

Printer2 13th January 2012 11:02 PM


Originally Posted by DF96 (Post 2860621)
Sorry to be dumb, but what is the point?

Because we can?

DF96 13th January 2012 11:28 PM

OK, each to their own!

gcwills 13th January 2012 11:29 PM

Any photos of your amp Pilovis?

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