Isolating parallel feed amplifiers

neazoi · 24th July 2008, 07:40 AM

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

nitrate · 24th July 2008, 10:06 AM

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

neazoi · 24th July 2008, 10:09 AM

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.

nitrate · 24th July 2008, 10:14 AM

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

neazoi · 24th July 2008, 10:15 AM

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

nitrate · 24th July 2008, 10:48 AM

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

neazoi · 24th July 2008, 10:51 AM

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?

24th July 2008, 07:40 AM	#1
neazoi diyAudio Member Join Date: Aug 2007	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 __________________ Great DIY site: http://www.neazoi.com

24th July 2008, 10:06 AM	#2
nitrate diyAudio Member Join Date: Jun 2005 Location: England, Lancashire	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 __________________ The perfect amplifier is a piece of wire with gain....

24th July 2008, 10:09 AM	#3
neazoi diyAudio Member Join Date: Aug 2007	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. __________________ Great DIY site: http://www.neazoi.com

24th July 2008, 10:14 AM	#4
nitrate diyAudio Member Join Date: Jun 2005 Location: England, Lancashire	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 __________________ The perfect amplifier is a piece of wire with gain....

24th July 2008, 10:15 AM	#5
neazoi diyAudio Member Join Date: Aug 2007	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 __________________ Great DIY site: http://www.neazoi.com


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

24th July 2008, 10:48 AM	#6
nitrate diyAudio Member Join Date: Jun 2005 Location: England, Lancashire	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 __________________ The perfect amplifier is a piece of wire with gain....

24th July 2008, 10:51 AM	#7
neazoi diyAudio Member Join Date: Aug 2007	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? __________________ Great DIY site: http://www.neazoi.com

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
6AS7 Parallel Feed Amp	lcsegeng	Tubes / Valves	7	9th August 2008 02:17 AM
Adding a parallel feed on DRD	eeyore	Tubes / Valves	1	11th July 2007 04:57 AM
Magnequest B7 parallel feed transformer for sale	MiaTele52	Swap Meet	3	16th January 2006 03:42 AM
seeking: tube for a SEP parallel feed like an EL84, but with a lower Ra	aletheian	Tubes / Valves	30	17th November 2005 04:24 AM
Parallel feed OT	Bas Horneman	Tubes / Valves	25	12th February 2003 02:07 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read