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Old 20th November 2012, 10:20 AM   #2961
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Quote:
Originally Posted by Nelson Pass View Post
Just ask Jill.

Here's a picture just to distract you from my having all the good transistors.

You a runner Nelson?
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Old 20th November 2012, 10:45 AM   #2962
Zen Mod is offline Zen Mod  Serbia
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make one F6 with SS , and another one with plain vanilla

then call them as you want


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Old 20th November 2012, 11:12 AM   #2963
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Quote:
Originally Posted by Zen Mod View Post
make one F6 with SS , and another one with plain vanilla

then call them as you want


sort of following on from that and relating to what Antoinel said in post 2927...I was just thinking(v. dangerous for me) that if Papa has all the SS stock then there is little point in him designing for us(diyers) because we can't build such designs without the devices(unobtanium).......

so what is Papa going to do with all that stock!!:

a) build like J2(not for diy) and keep some back for failure replacement(what failure!)....

b) release some, or design for those lucky enough to have a stash.
c) scrap the stock
d) find drop in replacement

I was just thinking, that's all

Papa?
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Old 20th November 2012, 11:18 AM   #2964
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sort of following on from that and relating to what Antoinel said in post 2927...I was just thinking(v. dangerous for me) that if Papa has all the SS stock then there is little point in him designing for us(diyers) because we can't build such designs without the devices(unobtanium).......

so what is Papa going to do with all that stock!!:

a) build like J2(not for diy) and keep some back for failure replacement(what failure!)....

b) release some, or design for those lucky enough to have a stash.
c) scrap the stock
d) find drop in replacement

I was just thinking, that's all

Papa?
seems like a very good investment to me, considering the going rate on other highly acclaimed parts. ZM is always trying to get us to see that Nelson uses whatever part he has and makes it sound like he wants it too. The F6 is a very valuable deisgn, for one reason, IMO. It allows the builder to tweak and listen to harmonic structure easily. If yo u do this while measuring, you can get a feel for what you like and possible ways of achieving it. Being noobs, we need hand holding, being the master, i could give him some random $2 part, and h would fashion it into a sweet sounding amp. The ACA comes to mind. If you look closely there, you have a pretty good idea of another popular Pass amp. Nelson has bread crumbs everywhere. Just got to follow thm and do the work. Thats wher i fail every time
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Old 20th November 2012, 11:21 AM   #2965
Zen Mod is offline Zen Mod  Serbia
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Originally Posted by buzzforb View Post
..... Nelson has bread crumbs everywhere.......
oh , boy ....... you don't even know how right you are
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Old 20th November 2012, 11:27 AM   #2966
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I love it. The discovery is the most interesting part. Failure second. Then I guess listening.
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Old 20th November 2012, 11:37 AM   #2967
lhquam is offline lhquam  United States
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Has anyone built an F6 with "standard" MOSFETs? What is needed for temperature stability? Will source degeneration be enough or will active thermistor control of the bias be needed?

Quote:
Originally Posted by Zen Mod View Post
make one F6 with SS , and another one with plain vanilla

then call them as you want


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Old 20th November 2012, 12:57 PM   #2968
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Is the extra 5 watt gain in the F6 due to the transformer in the circuit or the quasi push-pull output stage?

Another question- Can SemiSouth 085 be used?
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Old 20th November 2012, 01:04 PM   #2969
labjr is offline labjr  United States
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Originally Posted by vdi_nenna View Post
Is the extra 5 watt gain in the F6 due to the transformer in the circuit or the quasi push-pull output stage?

Another question- Can SemiSouth 085 be used?
You mean extra 5 dB?
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Old 20th November 2012, 01:13 PM   #2970
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Extra 5 by comparison to ?
And no to 085 thats a depletion mode normally on part amigo

Last edited by kasey197; 20th November 2012 at 01:15 PM.
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