UV 203A any good for audio ?

exurbia · 9th January 2010, 09:06 PM

I have found a pair of NOS 203A in next doors shed, $10.00 for the pair if I can use them.

Short question, are they worth ten bucks ?
And can they be used for an audio freq. amplifier ?
Last question, any circuit or design suggestions ?

TIA,
Peter.

Shoog · 9th January 2010, 09:14 PM

What a beast of a tube. Looks nice and linear to.
But however if you have to ask that question of this tube, then its well above your abilities to do anything safely with it. Give it a miss unless you can swap it for something a bit more managable.

Shoog

exurbia · 9th January 2010, 09:42 PM

Hi Shoog,
Thanks for the reply, I like to build stuff to a design. I have a nice 838 A2 burning away at my sons place. That came from a German design from Jogi's pages. Designing is not my cup of tea, too much maths. I would have been a Heathkit man had they still been around.

rastus · 10:56 PM

Aren't 203A's reasonably similar to 838's?

Plus, they seem to use the same OT in most applications.

The 8005's used in McIntosh MI-200AB are supposedly 203A's with a top cap.

So must be ok for audio.

I'd definitely get 'em.

exurbia · 9th January 2010, 11:22 PM

At $5.00 per piece I grabbed them. Might even send em to the boy and he can check them out.

Bob_345 · 10th January 2010, 03:51 AM

I saw one of those today!. i had know idea what it was untill you posted this. ith had no makings or anthig. i woud think that those woud have close to 1000 volt plate voltages though

9th January 2010, 09:06 PM	#1
exurbia diyAudio Member Join Date: Jul 2002 Location: Perth	UV 203A any good for audio ? I have found a pair of NOS 203A in next doors shed, $10.00 for the pair if I can use them. Short question, are they worth ten bucks ? And can they be used for an audio freq. amplifier ? Last question, any circuit or design suggestions ? TIA, Peter. __________________ It's all spin at the Commonwealth party.

9th January 2010, 09:42 PM	#3
exurbia diyAudio Member Join Date: Jul 2002 Location: Perth	Hi Shoog, Thanks for the reply, I like to build stuff to a design. I have a nice 838 A2 burning away at my sons place. That came from a German design from Jogi's pages. Designing is not my cup of tea, too much maths. I would have been a Heathkit man had they still been around. __________________ It's all spin at the Commonwealth party.

9th January 2010, 10:27 PM	#4
rastus diyAudio Member Join Date: Mar 2005 Location: QLD	Aren't 203A's reasonably similar to 838's? Plus, they seem to use the same OT in most applications. The 8005's used in McIntosh MI-200AB are supposedly 203A's with a top cap. So must be ok for audio. I'd definitely get 'em. Last edited by rastus; 9th January 2010 at 10:56 PM.

9th January 2010, 11:22 PM	#5
exurbia diyAudio Member Join Date: Jul 2002 Location: Perth	At $5.00 per piece I grabbed them. Might even send em to the boy and he can check them out. __________________ It's all spin at the Commonwealth party.

10th January 2010, 03:51 AM	#6
Bob_345 diyAudio Member Join Date: Jan 2010 Location: Saratoga,CA	cool I saw one of those today!. i had know idea what it was untill you posted this. ith had no makings or anthig. i woud think that those woud have close to 1000 volt plate voltages though

9th January 2010, 09:14 PM	#2
Shoog diyAudio Member Join Date: Aug 2002 Location: Eire	What a beast of a tube. Looks nice and linear to. But however if you have to ask that question of this tube, then its well above your abilities to do anything safely with it. Give it a miss unless you can swap it for something a bit more managable. Shoog

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