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Old 1st April 2010, 02:41 PM   #81
max426 is offline max426  United States
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Quote:
Originally Posted by cjkpkg View Post
I am a little confused. If I were to run a B1 with an amp that does not have a volume control from a source that does not have a volume control, do I need to add a volume control? Or do the 25K pots act as the volume control?

I am not sure if you are supposed to adjust the pots to optimize your "system" impedance and THEN add your volume control either up or down stream?
the 25k pots are the volume control
jim
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Old 5th April 2010, 03:35 PM   #82
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Is the value of c101 and 202 critical ? I have in hand 2 axon 11uf that I want to use in my build.
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Old 5th April 2010, 04:19 PM   #83
studeb is offline studeb  United States
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Originally Posted by etoiledusoir View Post
Is the value of c101 and 202 critical ? I have in hand 2 axon 11uf that I want to use in my build.
i have not stayed at a Holiday Inn in a while, but they should be fine. If you use smaller values, i believe you will limit the low end response.
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Old 5th April 2010, 04:21 PM   #84
AndrewT is offline AndrewT  Scotland
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Hi,
C101 & C201 form a high pass output filter with the impedances that follow them. They also block DC passing to the next stage.

10uF or 11uF feeding 221k//22k will have F-1dB~1.5Hz.
If there is a further DC block at the power amp input and it is also 10uF the F-1dB will rise to ~3Hz and if power amp uses 1uF F-1dB will rise to ~17Hz

The lowest quality of the DC blocking caps should be temporarily shorted out when you have a second DC block in the other bit of equipment.
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Old 15th April 2010, 03:13 PM   #85
cjkpkg is online now cjkpkg  United States
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Finally acquired all the stuff to build the B1 - the chassis is on its way.

Went with Vishay CMF50 resistors, Jantzen Z 10uF caps, Vishay MKP 1uF caps, Alps pot, and neutrik NYS367 RCAs.

I finally settled on THIS hifi2000 chassis from audiophonics.fr.

For power I acquired some Dell sockets from ebay and I will use one of the many 19V Dell adapters I have kicking around.

I also went with NKK LED tipped switches - hopefully they end up as I envision.

Pics to follow as I progress...
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Old 15th April 2010, 04:04 PM   #86
jleaman is offline jleaman  Belgium
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Quote:
Originally Posted by cjkpkg View Post
Finally acquired all the stuff to build the B1 - the chassis is on its way.

Went with Vishay CMF50 resistors, Jantzen Z 10uF caps, Vishay MKP 1uF caps, Alps pot, and neutrik NYS367 RCAs.

I finally settled on THIS hifi2000 chassis from audiophonics.fr.

For power I acquired some Dell sockets from ebay and I will use one of the many 19V Dell adapters I have kicking around.

I also went with NKK LED tipped switches - hopefully they end up as I envision.

Pics to follow as I progress...

Nice case would love to see more pictures Keep us updated .
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Old 15th April 2010, 04:56 PM   #87
cjkpkg is online now cjkpkg  United States
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I'll probably stuff the board and wire enough to give a quick listen this weekend...I'm anxious to hear how it sounds with the F5
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Old 15th April 2010, 05:16 PM   #88
jleaman is offline jleaman  Belgium
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Quote:
Originally Posted by cjkpkg View Post
I'll probably stuff the board and wire enough to give a quick listen this weekend...I'm anxious to hear how it sounds with the F5
I'm in the middle of boxing up my stuff, so when i get to my new place ill finnish the board stuffing, and test mine out too
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Old 15th April 2010, 05:20 PM   #89
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Nice chassis, got one problem, my caps are 45 mm alone.
I ordered the Slimline 02/230 silver front 10mm cover 3mm alu.

John
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Old 15th April 2010, 05:26 PM   #90
jleaman is offline jleaman  Belgium
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Quote:
Originally Posted by gervenja View Post
Nice chassis, got one problem, my caps are 45 mm alone.
I ordered the Slimline 02/230 silver front 10mm cover 3mm alu.

John
Looks good, Id use some shielded wire tho, if the volume pot is going to be close those wires should be fine tho!
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