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Old 24th July 2008, 07:40 AM   #1
neazoi is offline neazoi  Greece
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Default Isolating parallel feed amplifiers

Hello all,
I have some vacuum tube oscillators (tube sunth) and I would like to mix their audio outputs.

I have been informed that:

You also need to isolate
the plate voltage for each tube from all the other tubes. A 5k resistor and 10 uF bypass capacitor would do.

I would like more info on this please. How shall I connect the resistor and the capacitor in order to make this isolation possible?

Maby connect the resistor in series with the +v and then connect the output (or input) of the resistor to the ground by using a capacitor?


Thanks a lot
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Old 24th July 2008, 10:06 AM   #2
nitrate is offline nitrate  United Kingdom
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Hi there,

I'm not being funny and i don't wish to offend you but if your electronics is that flakey i strongly suggest you don't go any further on grounds of safety. You really need to lean a bit more on the subject before attempting to modify high voltage tube equipment.

Regards

Leigh
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Old 24th July 2008, 10:09 AM   #3
neazoi is offline neazoi  Greece
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Sorry but I have build quite a few tube amplifiers and preamplifiers but I have never tried a thyratron oscillator as the one I mention. Thus I would like to make sure about the topology. I know what bypassing means I just would like another oppinion and not a judgement please.
Thank you.
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Old 24th July 2008, 10:14 AM   #4
nitrate is offline nitrate  United Kingdom
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My apologies Neazoi,

Its just the way you worded your last post. It sounded as though you had no experience or knowledge of the subject. Please accept my apologies and good luck in your endevour.

regards

Leigh
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Old 24th July 2008, 10:15 AM   #5
neazoi is offline neazoi  Greece
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Not a problem,
Oftenly, the problem with people is that they give you some info of how to build something but they do not know how is it called in theory. That is why I would like to make sure.
best regards
neazoi
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Old 24th July 2008, 10:48 AM   #6
nitrate is offline nitrate  United Kingdom
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Just concerned for a fellow members safety thats all This just goes to highlight how difficult the language barriers can be in a multi-lingual forum like this one. Hope you didn't take things to heart.

Leigh
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Old 24th July 2008, 10:51 AM   #7
neazoi is offline neazoi  Greece
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I know about language barriers (studying in UK for 6 years).
Do not worry

Back in the topic is what I am thinking about the topology right?
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