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Old 13th May 2006, 10:56 AM   #1
edoirt is offline edoirt  France
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Default Aleph 5 with Brian GT boards. (help)

Hi All
Excuse my poor English but I come to seek of the assistance for a new project.
I ordered PCBs and I plan to build Aleph 5 in version double mono.
Here is the problem: I would like to draw up a list of the components for Aleph 5 adapted to the establishment of Brian PCBs (mini Aleph) to place an order at digikey from France. The lists of components exist on the Net but I did not find the establishment adapted to the diagram of Brian. Could you help me to supplement the following list ?
By advance thank you
Daniel



Amplifier board Brian GT Aleph 5

Capacitors
C1-C3
C4
C5
C6

Diodes
D1-D5

Resistors
R0
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
R47
R48
R49

Transistors
Q1-Q3
Q4-Q5
Q6-Q7

Output boards
Q8-Q13
R29-R34
R35-R40
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Old 13th May 2006, 05:08 PM   #2
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Here's the link to Brian's website. It includes a list of parts. The bias resisters needs to be changed for and Aleph60 (R12, R13, R17).

http://www.diyamps.com/aleph/aleph.shtml

-David
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Old 13th May 2006, 06:29 PM   #3
edoirt is offline edoirt  France
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Post #2
Here's the link to Brian's website. It includes a list of parts. The bias resisters needs to be changed for and Aleph60 (R12, R13, R17).

http://www.diyamps.com/aleph/aleph.shtml

-David


Hi david
Thanks for your reply. For a Aleph 5 are all the other components the same of Aleph 30 except R12,R13,R17 ?
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Old 14th May 2006, 09:33 AM   #4
edoirt is offline edoirt  France
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Default aleph 5 with Brian GT boards

Hi all
i found some corespondances for the values of some components as their establishment on the diagram of Brian but this is not simple for me.
Are they exact and would have you to them complements?
By advance thank you

Amplifier board parts for 1 channel Aleph 5 BrianGT

component designation value digikey part # quantity
Capacitors
C1-C3 220uf P10326-ND 3
C4 10pf 338-1090-ND 1
C5
C6
Diodes
D1-D5 9.1v zener 1N4739ADICT-ND 5
Resistors
R0
R1.R9
R2.R15 100K 2
R3.R10
R4.R7.R8.R11.R29-R34 221 PPC221XCT-ND 11
R5 4.75K PPC4.75KXCT-ND 1
R12
R13
R14.R16 1.50K PPC1.50KXCT-ND 1
R17.R18
R20 1.00k PPC1.00kXCT-ND 2
R23-R26.R35-R40.R47.R48 0,47 P0.47W-3BK-ND 4
Transistors
Q1-Q3 IRF9610 IRF9610PBF-ND 3
Q4-Q5 ZTX450 ZTX450-ND 2
Q8-Q13 IRFP240 IRFP240PBF-ND 6
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Old 14th May 2006, 11:08 AM   #5
edoirt is offline edoirt  France
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Default aleph 5 with Brian GT boards

HI all

Research continues and I could find on the Net the values with the following establishments.
1-could say itself to me if they are exact?
2- I miss it the values for;
-C6 ?
-R 0 ?
-R 12 ?
-R 13 ?
-R 17 ?
For those which have already condtruit a aleph 5 with these PCBs would have this information?
Thank you

Amplifier Brian board parts for 1 channel ALEPH 5

component designation value digikey part # quantity

Capacitors

C1-C3 220uf P10326-ND 3
C4 10pf 338-1090-ND 1
C5 1nf PS1H103G-ND 1
C6 javascript:smilie('')
smash

Diodes

D1-D5 9.1v zener 1N4739ADICT-ND 5

Resistors

R0 ? ? 1javascript:smilie('')
smash
R1.R9 10.0K PPC10.0KXCT-ND 2
R2.R15 100K PPC100KXCT-ND 2
R3.R10 68.1K PPC68.1KXCT-ND 2
R4-R8-R11-R19-R21-R22-R29-R30-R31-R32-R33-R34 221 PPC221XCT-ND 12
R35-R36-R37-R38-R39-40 1 1 Ohm - 3W 6
R5 4.75K PPC4.75KXCT-ND 1
R12 ? ? 1javascript:smilie('')
smash
R13 ? ? 1javascript:smilie('')
smash
R14.R16 1.50K PPC1.50KXCT-ND 1
R17 ? ? 1javascript:smilie('')
smash
R18 392 PPC392XCT-ND 1
R20 1.00k PPC1.00kXCT-ND 2
R23-R24.R25-R26.R27.R28 0,47 P0,47W-3BK-ND 6

Transistors

Q1-Q3 IRF9610 IRF9610PBF-ND 3
Q4-Q5 ZTX450 ZTX450-ND 2
Q8-Q13 IRFP240 IRFP240PBF-ND 6
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Old 14th May 2006, 05:30 PM   #6
edoirt is offline edoirt  France
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Default a

Hi all

here the schema but i still do not find the values of the following components for a aleph 5
C6 ?
R6 ?
R12 ?
R13 ?
R17 ?

Could somebody indicate only these some values ?
I think that the remainder is OK
Thanks
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Old 19th May 2006, 08:34 PM   #7
edoirt is offline edoirt  France
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Default aleph 5 with Brian GT boards

Hi
Thanks Steen and dw8083 for your replies
Here the values with the correspondences of the circuit aleph. R6 is optional but which could be its value?
Edoirt

Amplifier board
Capacitors value équivalences shéma Aleph
C1-C3 220uf C5 C10 C9
C4 10pf C8
C5 1nf C7 0.47nf
C6 47nf

Diodes équivalences shéma Aleph
D1-D5 9.1v zener Z1-Z5

Resistors value équivalences shéma Aleph
R0 3.0 3W
R1 10.0K R2
R2 100K R6
R3 68,1K R4
R4 221 R12
R5 4.75K R13 10K
R6 Optionnel
R7 221 R9
R8 221 R11
R9 10K R3
R10 68,1K R5
R11 221 R10
R12 453 R21
R13 221K R19
R14 1,5K R17 4.75K
R15 100K R7
R16 1.5K R18
R17 75 R16
R18 392 R14
R19 not used R52-54
R20 1.00K R20
R21 221 R15
R22 not used R28-30
R23 0,47 R22
R24 0,47 R23
R25 0,47 R24
R26 0,47 R25
R27 not used R64-66
R28 not used R40-42




Transistors value équivalences shéma Aleph
Q1-Q3 IRF9610 Q2-Q1-Q3
Q4-Q5 ZTX450 Q4-Q5 MPSA18
Q6-Q7 not used

Output boards value équivalences shéma Aleph
Q8-Q13 IRFP240 R28-R30 Q18-Q20
R29-R34 221 R28-R30 R52-54
R35-R40 1.0 3W R40-42 R64-66
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Old 19th May 2006, 08:59 PM   #8
jleaman is offline jleaman  Belgium
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Default Re: aleph 5 with Brian GT boards

Quote:
Originally posted by edoirt
Hi
Thanks Steen and dw8083 for your replies
Here the values with the correspondences of the circuit aleph. R6 is optional but which could be its value?
Edoirt

It's only needed when all fets are really really closly matched. I have tried it with it in and it makes no difference in sound at all.
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Old 20th May 2006, 09:39 AM   #9
edoirt is offline edoirt  France
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Default aleph 5 with Brian GT boards

HI all
OK for R6 jleaman but there is still a mystery for me ;
The corespondances between the 2 diagrams reveal some different values;

- R3=R4 68.1K/10K
- R5=R13 4.75K/10K
- R10=R5 68.1K/10K
- R14=R17 1.5K/4.75K

Which are the values to be retained?
Those of the diagram of Brian or those of the Aleph 5 diagram ?
Edoirt
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Old 20th May 2006, 12:43 PM   #10
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Join Date: May 2006
Default Aleph 5 with Brian GT Board

Hi Everybody.
I'm building an Aleph 5.
I have a question about a détail of the schématic diagram aroud Q5 (see the File attached).
Why ,in this schématic, the cap C5 (value 1NF) is connected between the Base and Collector of Q5 (ZTX450), and in the original Schématic of Nelson Pass we can find this same cap ( Value 47NF) connected between the Collector and Emitter of Q5 (MPSA18).
thanks for your response.
Best regards.
Raydiven
Attached Files
File Type: pdf minialeph-sch.pdf (27.0 KB, 314 views)
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