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Old 19th October 2005, 02:35 PM   #1
drobert is offline drobert  Hungary
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Default 6sn7 pre

hello,

I look for a link to this schematic. Can anybody help me?

drobert
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Old 19th October 2005, 03:20 PM   #2
kmtang is offline kmtang  Canada
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Default JE Lab

Hi,

Take a look at the JE Lab's line stage. It is very simple but with very good sound.

73
Johnny
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Old 19th October 2005, 03:25 PM   #3
kmtang is offline kmtang  Canada
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Here is the link.

http://members.myactv.net/~je2a3/jelphono.htm
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Old 20th October 2005, 08:36 AM   #4
drobert is offline drobert  Hungary
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Hello Johny

Thanks a lot your answer, but I think that you misunderstanded me.

I look for a web page where there is this scematic because I need to the descreption for this.

drobert
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Old 20th October 2005, 02:47 PM   #5
amperex is offline amperex  United States
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Default I do not understand your reply

When I view a schematic & parts lists of a design, the entire design is automatically converted to my verbal language of english. In other words, I guess I see the trees in the forest, just not the forest itself.
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Old 24th October 2005, 01:13 AM   #6
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What is unclear?

you have a power supply which will deliver ~240V. The 6SN7 runs its heaters on AC. It has ~6kOhm output Z( excepting where the coupling cap takes over and dominates at lower frequency ).

You should be able to get it working almost anything which is even close to what is described on that schematic.

I'd suggest a higher B+, and double the plate load resistor. 32-34kOhm is a nice load line when B+ is ~440VDC. Drop 250 of those volts across the plate load, for about 6-8 mA.
cheers,
Douglas
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