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Old 4th November 2012, 11:21 AM   #2641
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Enjoying Bad Plus, "These are the Vistas". I think you might even like this one, ZM.
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Old 4th November 2012, 11:49 AM   #2642
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Hi!
ZM said the 2SK170 and 2SJ74 should have an Idss of 8mA.
I have two pair of the GR-types here, which have an Idss of 4,70/4,80mA. Will they work in this circuit?
What do I have to change in the circuit to make it work?
What are the disadvantages when using GR-types? Do you recommend to get some BL types?

I'm sorry, if it is a stupid question, but i'm quite new to electronic circuits..

Thanks a lot!
Stefan
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Old 4th November 2012, 12:07 PM   #2643
Zen Mod is offline Zen Mod  Serbia
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just toss them in and make entire shebang

when/if you can find pair of BL matched ones , replace them

generally - with higher Idss group , xconductance is guaranteed to be higher , so output impedance of buffer is lower , which can't be bad thing
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Old 4th November 2012, 12:10 PM   #2644
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Thanks Zen Mod!
As I'm still waiting for some other parts, i will try to get some BL types...


Stefan
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Old 4th November 2012, 04:45 PM   #2645
Zen Mod is offline Zen Mod  Serbia
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at last !!

http://firstwatt.com/pdf/art_f6.pdf
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Old 4th November 2012, 05:06 PM   #2646
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Ring one up for the good guys
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Old 4th November 2012, 05:10 PM   #2647
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yep... He rang my bell...again...
Amazing that he is going to so much work!
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Last edited by cochleus; 4th November 2012 at 05:28 PM.
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Old 4th November 2012, 05:28 PM   #2648
Mr. dB is offline Mr. dB  United States
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Old 4th November 2012, 07:07 PM   #2649
zany is offline zany  Australia
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Naughty and greedy boy ZM...
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Old 4th November 2012, 07:28 PM   #2650
generg is offline generg  Germany
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o-k. two channels are running with two Jensens ( I still have to determine the polarities with the ISKRA)......

.....the low level clarity ist very good, I think this amp excels in clarity and articulation. With two channels running, it is easier to see the characteristic of the F6.
For me it is not an amp that increases anything like stage, colors and so on, may be it sounds a bit dry and anti alcoholic ........ but hear yourself, it is for me a new category of sound First Watt amps produce!
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