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Old 11th January 2013, 03:22 AM   #1021
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the efficiency of a class A amp varies. as with all other classes.
a push-pull class A is more efficient then a pure class A (as the aleph's)
there is no exact formula for this.
1.6KVA is good for 2channels of v3. but i would have build the amps as monoblocks and had a external chassis for the transformer.

Last edited by AudioSan; 11th January 2013 at 03:24 AM.
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Old 11th January 2013, 02:46 PM   #1022
BigE is offline BigE  Canada
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Thank you AudioSan. You're a gentleman!
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Old 11th January 2013, 02:48 PM   #1023
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Don't go too far, BigE.

Mr San,
when you going to get that thing up and running. I cant wait to hear what you think of the difference.
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Old 11th January 2013, 05:50 PM   #1024
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Hi BuzzForb,
I was wondering what you did with your diodes for heatsinking,did you use a seperate sink? If so what size?
Thanks,
NS
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Old 11th January 2013, 05:52 PM   #1025
6L6 is offline 6L6  United States
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F5T v2 Amp board(s) BOM

If you see any errors, please speak up.


Links through Digi-key.

Vishay/Dale CMF resistors and Panasonic ERX. Bourns pots, Vishay thermistor, MUR diodes. Nichicon KW caps. No links for small transistors, as there is no current stock.

Contact Buzzforb for the power transistors.

C1,2 - 10uf, 50V - UKW1H100MDD Nichicon | 493-3187-ND | DigiKey

R1, 5, 6 - 1K 1/2W CMF551K0000FKEA Vishay Dale | CMF1.00KHHCT-ND | DigiKey

R2 - 47.5K 1/2W CMF5547K500FHEB Vishay Dale | CMF47.5KHFCT-ND | DigiKey

R3, 4 - 10ohm 1/2W CMF5510R000FKEB Vishay Dale | CMF10.0HGCT-ND | DigiKey

R7, 8, 9, 10 - 220ohm 3W ERG-3SJ221 Panasonic Electronic Components | P220W-3BK-ND | DigiKey

R11, 12 - 2.2k 1/2W CMF552K2000FHEK Vishay Dale | CMF2.20KHA-ND | DigiKey

R13, 14, 15, 16 -- 47.5ohm 1/2W CMF5547R500FHEB Vishay Dale | CMF47.5HFCT-ND | DigiKey

R17 thru 24 - 1ohm 3W ERX-3SJ1R0 Panasonic Electronic Components | P1.0W-3BK-ND | DigiKey

P1, 2 - 5K 3296W-1-502LF Bourns Inc. | 3296W-502LF-ND | DigiKey

P3 - 200ohm 3296W-1-201LF Bourns Inc. | 3296W-201LF-ND | DigiKey

TH1, 2 - 4.7K NTC NTCLE100E3472GB0 Vishay BC Components | BC2427-ND | DigiKey

Q1 - 2SK170

Q2 - 2SJ74

Q3,4 - FQA12P20

Q5,6 - FQA19N20



Cascode Front-end parts (optional on v2, but not a bad idea...)

C5,6 - 10uf 50v UKW1H100MDD Nichicon | 493-3187-ND | DigiKey


R25 - 10K CMF5510K000FHEB Vishay Dale | CMF10.0KHFCT-ND | DigiKey

R26 - 47.5k UKW1H100MDD Nichicon | 493-3187-ND | DigiKey

R27,28 - 4.75K CMF5510K000FHEB Vishay Dale | CMF10.0KHFCT-ND | DigiKey

R29,30 - 475ohm CMF55475R00FHEB Vishay Dale | CMF475HFCT-ND | DigiKey

Q7 - 2SC4793

Q8 - 2SA1837
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Old 11th January 2013, 05:56 PM   #1026
6L6 is offline 6L6  United States
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F5T v2 PSU BOM

Links to Digi-key

CL-30 CL-30 GE Sensing | KC003L-ND | DigiKey

CL-60 CL-60 GE Sensing | KC006L-ND | DigiKey

Ground breaker bridge GBPC3502-E4/51 Vishay Semiconductor Diodes Division | GBPC3502-E4/51GI-ND | DigiKey

FUSE 4.5 SLO

75C thermostat switch (not sure what is appropriate part)

C1 -- Line Cap .033uf (3300pf) CS13-E2GA332MYNS TDK Corporation | 445-2425-ND | DigiKey

D1, 2, 3, 4 - Main Bridge Diodes MUR 3020 MUR3020WTG ON Semiconductor | MUR3020WTGOS-ND | DigiKey

C2, through C17 -- Filter Capacitors ECO-S1HA103DA Panasonic Electronic Components | P6690-ND | DigiKey

R1 through R14 -- Filter Resistors ERX-3SJR47 Panasonic Electronic Components | P0.47W-3BK-ND | DigiKey
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Old 11th January 2013, 05:59 PM   #1027
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Hi 6l6,
Q7 and 8 can also be MJE15035 and MJE15034,
Looks GREAT!
Regards,
NS

Last edited by noSmoking; 11th January 2013 at 06:19 PM. Reason: du
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Old 11th January 2013, 06:41 PM   #1028
nrg2009 is offline nrg2009  United States
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great post 6L6, are you building yours as a stereo in a 5U chassis?
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Old 11th January 2013, 06:41 PM   #1029
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Quote:
Originally Posted by buzzforb View Post
Don't go too far, BigE.

Mr San,
when you going to get that thing up and running. I cant wait to hear what you think of the difference.
hello i need to get a new M3 tap first. i'll see if i can get one tommorow.
but any sound testing will be a while. i hope to get some alu for the chassis next week. then there is just the building

Last edited by AudioSan; 11th January 2013 at 06:43 PM.
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Old 11th January 2013, 06:51 PM   #1030
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Quote:
Originally Posted by AudioSan View Post
hello i need to get a new M3 tap first. i'll see if i can get one tommorow.
but any sound testing will be a while. i hope to get some alu for the chassis next week. then there is just the building
you got it all backwards. you listen first. finish later
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