Take a look and let me know what you think

nhuwar · 18th February 2008, 10:12 PM

Hi All,

This is a schematic for you to critique it. As you can see I don't have a b+ or bias point for the output tube yet nor do I have the plate load set yet as this info will be found by experimentation do to the none audio use of this tube.

http://images35.fotki.com/v1132/file...25102/rev2.jpg

Thanks,
Nick

Miles Prower · 19th February 2008, 04:50 AM

^^^^

404 File not found error.

nhuwar · 19th February 2008, 11:27 AM

http://public.fotki.com/nhuwar/6c21-se-amp/

SY · 19th February 2008, 11:34 AM

Quote:

As you can see I don't have a b+ or bias point for the output tube yet

Then why design a driver for it? First things first, you have to know what the drive requirements are, then you can rationally work backward to the input.

edit: If this is an Eimac 6C21, you'll need a PILE of power and swing to drive it. A 6SN7 won't even tickle that puppy.

http://frank.pocnet.net/sheets/088/4/450TL.pdf

nhuwar · 19th February 2008, 12:53 PM

Hi SY,

The eimac 450tl and a 6c21 are diffrent as opposed to normal though a 6c21 has a mu of 30 rather then 18.

Nick

SY · 19th February 2008, 01:54 PM

You've seen this?

http://www.lakeerieba.com/6C21/6C21.htm

nhuwar · 19th February 2008, 02:21 PM

Yes I have. The only diffrence is I'm using machelett tubes not Eimac. Also I'm going to be running it in class a1 and the reason I haven't done the work yet is it's too dam cold in my garage here LOL. But thats what I get for living in New England.

So excatly what suggesions do you have SY do you think I'm going about this all wrong?

Nick

SY · 19th February 2008, 02:29 PM

Just backward. I'd start by putting the output tube on the bench and getting some of the basic parameters for the A1 service you're contemplating.

nhuwar · 19th February 2008, 02:57 PM

Ya I know what you mean and I will be doing it justwanting for a warm day to do it. Also I'm wanting on the plate and grid heat sink caps.

nick

SY · 19th February 2008, 03:04 PM

There's a reason they call that glowy thing in the middle a "heater."

18th February 2008, 10:12 PM	#1
nhuwar diyAudio Member Join Date: Jan 2007 Location: Tomball Texas	Take a look and let me know what you think Hi All, This is a schematic for you to critique it. As you can see I don't have a b+ or bias point for the output tube yet nor do I have the plate load set yet as this info will be found by experimentation do to the none audio use of this tube. http://images35.fotki.com/v1132/file...25102/rev2.jpg Thanks, Nick

19th February 2008, 04:50 AM	#2
Miles Prower diyAudio Member Join Date: May 2005 Location: USA Blog Entries: 2	^^^^ 404 File not found error. __________________ There are no foxes in atheistholes www.dolphin-hsl.com

19th February 2008, 01:54 PM	#6
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	You've seen this? http://www.lakeerieba.com/6C21/6C21.htm __________________ “Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache

19th February 2008, 02:29 PM	#8
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	Just backward. I'd start by putting the output tube on the bench and getting some of the basic parameters for the A1 service you're contemplating. __________________ “Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache

19th February 2008, 03:04 PM	#10
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	There's a reason they call that glowy thing in the middle a "heater." __________________ “Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache

19th February 2008, 11:27 AM	#3
nhuwar diyAudio Member Join Date: Jan 2007 Location: Tomball Texas	http://public.fotki.com/nhuwar/6c21-se-amp/

19th February 2008, 12:53 PM	#5
nhuwar diyAudio Member Join Date: Jan 2007 Location: Tomball Texas	Hi SY, The eimac 450tl and a 6c21 are diffrent as opposed to normal though a 6c21 has a mu of 30 rather then 18. Nick

19th February 2008, 02:21 PM	#7
nhuwar diyAudio Member Join Date: Jan 2007 Location: Tomball Texas	Yes I have. The only diffrence is I'm using machelett tubes not Eimac. Also I'm going to be running it in class a1 and the reason I haven't done the work yet is it's too dam cold in my garage here LOL. But thats what I get for living in New England. So excatly what suggesions do you have SY do you think I'm going about this all wrong? Nick

19th February 2008, 02:57 PM	#9
nhuwar diyAudio Member Join Date: Jan 2007 Location: Tomball Texas	Ya I know what you mean and I will be doing it justwanting for a warm day to do it. Also I'm wanting on the plate and grid heat sink caps. nick

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