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B1 Rev. 2
B1 Rev. 2
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Old 6th January 2017, 03:10 AM   #1
vdi_nenna is offline vdi_nenna  United States
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Default B1 Rev. 2

This cool schematic can be found in the middle of two threads.
I though it should be easily found.
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File Type: gif B1 r2.gif (81.0 KB, 3470 views)
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Old 6th January 2017, 03:11 AM   #2
6L6 is offline 6L6  United States
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B1 Rev. 2
That buffer block is the basis of ZenMod's "Iron Pre". Prototype PCB for the store have been ordered.
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Old 6th January 2017, 03:13 AM   #3
marc brown is offline marc brown  United States
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Sweet! Wonder how it sounds compared to B1 rev 1 and BA3 Pre?
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Old 6th January 2017, 03:15 AM   #4
6L6 is offline 6L6  United States
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B1 Rev. 2
Not sure if the BA3 would be a reasonable comparison, as the B1 variants are buffers and the BA3 has gain.

That said, I'd expect the B1 Rev2 to sound better than Rev 1, but I haven't yet heard it, I just like complimentary pairs better...
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Old 6th January 2017, 03:16 AM   #5
vdi_nenna is offline vdi_nenna  United States
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Followed by a step by step illistrated build guide?
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Old 6th January 2017, 03:17 AM   #6
6L6 is offline 6L6  United States
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B1 Rev. 2
Of the Iron Pre? Of course.

I'd like to build one of these B1 Rev2 and have a listen.
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Old 6th January 2017, 04:58 AM   #7
Zen Mod is online now Zen Mod  Serbia
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B1 Rev. 2
I can write something , when time permits

I can even make build guide , after that

regarding B1 vs. B1 v.2 ....... there is no fair comparison , just because Pa needed to include series output resistors in both of them , as idiotproof part

both will work better without it , when heavier load is in question

while difference in sound , when load isn't critical (v.2 having half Rout of v.1) is certainly matter of taste
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Old 6th January 2017, 05:02 AM   #8
marc brown is offline marc brown  United States
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Quote:
Originally Posted by Zen Mod View Post
I can write something , when time permits

I can even make build guide , after that

regarding B1 vs. B1 v.2 ....... there is no fair comparison , just because Pa needed to include series output resistors in both of them , as idiotproof part

both will work better without it , when heavier load is in question

while difference in sound , when load isn't critical (v.2 having half Rout of v.1) is certainly matter of taste

Can competent DIYers remove to improve the sound? Which resistors?


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Old 6th January 2017, 07:45 AM   #9
Zen Mod is online now Zen Mod  Serbia
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R105 in above schematic

make it just few ohms
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Old 6th January 2017, 07:57 AM   #10
jean-paul is offline jean-paul  Netherlands
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Just a few Ohms ? Are you sure this is good advice ?
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