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Old 26th December 2002, 10:12 AM   #1
jim is offline jim  Belgium
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Question 811a Class A2

Hi,

Does someone has some experience using the 811a in SE-A2 mode ?
I'd like to use it with the Lundahl LL1620 OPT and LL1660 IT.

Jim
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Old 26th December 2002, 11:36 AM   #2
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Default CLASS A2

Hi,

Personally I have never worked with this tube but here is a link that may be of interest to you:

811 CLASS a2


Cheers,
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Old 26th December 2002, 12:26 PM   #3
jim is offline jim  Belgium
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Hi Frank,

Thanks for the link, but the sv811-10 is a very different tube than the 811A.
The 'sv811' has a of 10 while the 811A has =160.

jim

Btw waar woon je ?
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Old 26th December 2002, 12:31 PM   #4
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Default SAME SAME BUT DIFFERENT.

Hi Jim,

Quote:
The 'sv811' has a of 10 while the 811A has =160.
I'll need to do a search on that again,sorry.



Quote:
Btw waar woon je ?
I live in Landen since April this year,used to live in Brussels before.

Landen is just between Tienen and Sint-Truiden.On the railway road Brussels-Luik/Liege.

And yourself?

Cheers,
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Old 26th December 2002, 12:39 PM   #5
jim is offline jim  Belgium
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Frank,

There are not so many schematics for this tube.
I've found only

811A & MORE

greets
Jim

I live in Beringen (near Leopoldsburg)
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Old 26th December 2002, 12:58 PM   #6
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Default 811A

Hi,

This tube was mostly used in radio and quite likely run in class B.

From what I found on the net it is still produced by Svetlana.

Yours may come from the Leopoldsburg military base perhaps?

The schematics you point at can be used if you want to build an amp with these.
Be ware of the high voltages though,this is definitely not beginners stuff.

Beringen?
As a student I used to date a beautiful girl from Beringen.


Cheers,
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Old 26th December 2002, 01:22 PM   #7
jim is offline jim  Belgium
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Yes, I don't know when you were a student but the
amount of beautiful girls in Beringen is still very high

My 811a's are NOS RCA and come from Kleine Brogel Air Force Base

In my job as radio technician I've worked on transmitters using
700V B+ so I'm aware of the risks involved, but thanks for the warning !(een verwittigd man is ......)

Jim
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Old 26th December 2002, 02:08 PM   #8
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Default NICE STUFF

Hi Jim,

You may enjoy reading this article:

811A

Quote:
Yes, I don't know when you were a student but the
About 25 years ago in Ghent.

Cheers,
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Old 26th December 2002, 02:31 PM   #9
halojoy is offline halojoy  Sweden
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Arrow SV811 - 20W amplifier - SEBASTIAN

SV811 - 20W amplifier - SEBASTIAN

uses 7247 as input and
811-10 or 572-10 as single output tube. 20W or 35W.
and an Output transformer called LL 9202-S with a primary impedance of 6000 ohms.

I found this when surfing in swedish tube territory.
I saved the link for future use.
I did not know I should get to use it so quick:

SEBASTIAN 20W SV811 - 35W SV572

Sorry to say I do not understand much of this circuit.
But someone else maybe does.

Click the image to open in full size.

/halo - one step ahead
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Old 26th December 2002, 02:35 PM   #10
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Default HALO??

Hi,

Halo: the SV811 and 811A are not the same tube.
Go through the thread and you'll see I made the same mistake.

Cheers,
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