Hi XRK - is it possible to build a balanced config with 4 x boards? 🙂
And I’m in Aus (QLD) - is there a way to get better shipping rate? Etsy is quoting almost fiddy bucks 😛
And I’m in Aus (QLD) - is there a way to get better shipping rate? Etsy is quoting almost fiddy bucks 😛
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You mean like a bridge tied load (BTL) amp? Maybe, let’s ask Hugh.
That would be like a 200w amp I think.
That would be like a 200w amp I think.
YES the BB ALPHA can be bridged like most amps.
Your outputs must be doubled for voltage and current but the specified mosfets are fine.
You would need balanced inputs for this OR you could insert a single to balanced stage to accord with a single input signal.
However this doubles all the parts count, and more - you will have a huge thermal problem around 235W per channel and lots of fans and cooling towers.
But all possible.....
HD
Your outputs must be doubled for voltage and current but the specified mosfets are fine.
You would need balanced inputs for this OR you could insert a single to balanced stage to accord with a single input signal.
However this doubles all the parts count, and more - you will have a huge thermal problem around 235W per channel and lots of fans and cooling towers.
But all possible.....
HD
Thanks Aksa 🙂 My preamp has balanced outputs, so hence the query - but I'm going to start with SE arrangement first, keep it simple 😀
Thanks, A3cervo.
To ABBB Builders:
Sorry for the confusion but there is no limit on the ABBB PCBs as we are still in pre-order mode. I got this mixed up with another project as I am handling multiple GBs at once. I just got word that the verification PCBs have been fabricated, however it will be a few days before the other boards in same order will be done. But should be shipping out to me in about 2 more days, and 3-4 days more before I receive it for the verification build. Vunce and I will be ordering the BOM in preparation for the verification build.
To ABBB Builders:
Sorry for the confusion but there is no limit on the ABBB PCBs as we are still in pre-order mode. I got this mixed up with another project as I am handling multiple GBs at once. I just got word that the verification PCBs have been fabricated, however it will be a few days before the other boards in same order will be done. But should be shipping out to me in about 2 more days, and 3-4 days more before I receive it for the verification build. Vunce and I will be ordering the BOM in preparation for the verification build.
Thanks for the update X - I’m just starting to research and put BOM together now - starting by merging the Alpha BB and SLB BOMs from respective threads. Do you plan on releasing the BOM you’re using for the verification build - it would be most helpful?
Here is the ABBB BOM (v0) - for prototype verification build only, subject to change.
Code:
ABBB Amp BOM v0 verification build July 1, 2019
Part Value Package Description
C101 220p C5B4.5 CAPACITOR
C102 10µ0 E5-10,5 POLARIZED CAPACITOR, European symbol
C104 1000µ E5-13 POLARIZED CAPACITOR, European symbol
C111 47p C1206 10µ, 16V, X7R, 1206
C113 1000µ E7,5-18 POLARIZED CAPACITOR, European symbol
C114 1µ0 C7.5B6 CAPACITOR
C115 0µ01 C5B7.2 CAPACITOR
C118 220µ E7,5-18 POLARIZED CAPACITOR, European symbol
C119 220µ E7,5-18 POLARIZED CAPACITOR, European symbol
C143 220p C0805 2µ2, 16V, X7R, 0805
C144 220p C0805 2µ2, 16V, X7R, 0805
C201 0µ01 C5B2.5 CAPACITOR
C202 0µ1 C5B2.5 CAPACITOR
C203 1µ0 C5B7.2 CAPACITOR
C204 15000µ EB35D POLARIZED CAPACITOR, European symbol
C205 1µ0 C5B7.2 CAPACITOR
C206 15000µ EB35D POLARIZED CAPACITOR, European symbol
C207 1µ0 C5B7.2 CAPACITOR
C211 1000µ E5-13 POLARIZED CAPACITOR, European symbol
C214 47p C1206 10µ, 16V, X7R, 1206
C215 47p CD15FD101FO3F
C216 1000µ E5-13 POLARIZED CAPACITOR, European symbol
C217 0µ1 C5B2.5 CAPACITOR
C218 220µ E3,5-8 POLARIZED CAPACITOR, European symbol
C221 0µ01 C5B2.5 CAPACITOR
C222 0µ1 C5B2.5 CAPACITOR
C223 1µ0 C5B7.2 CAPACITOR
C224 15000µ EB35D POLARIZED CAPACITOR, European symbol
C225 1µ0 C5B7.2 CAPACITOR
C226 15000µ EB35D POLARIZED CAPACITOR, European symbol
C227 1µ0 C5B7.2 CAPACITOR
C231 1000µ E5-13 POLARIZED CAPACITOR, European symbol
C234 47p C1206 10µ, 16V, X7R, 1206
C235 47p CD15FD101FO3F
C236 1000µ E5-13 POLARIZED CAPACITOR, European symbol
C237 0µ1 C5B2.5 CAPACITOR
C238 220µ E3,5-8 POLARIZED CAPACITOR, European symbol
C301 0µ22 C5B3 CAPACITOR
C302 NP E5-13 POLARIZED CAPACITOR, European symbol
C303 0µ22 C5B3 CAPACITOR
C308 22µ0 E2-5 POLARIZED CAPACITOR, European symbol
C1001 0µ022 C10B4 CAPACITOR
C1020 10µ0 C37.5B19 CAPACITOR
C1021 10µ0 MCAP250V10U Fidelity Component MCap
C1022 1µ0 C22.5B7 CAPACITOR
C1110 47p CD15FD101FO3F
C1180 1µ0 C7.5B6 CAPACITOR
C1190 1µ0 C7.5B6 CAPACITOR
H207 LED3MM LED
H227 LED3MM LED
H301 LTV-8141 DIL04 SHARP OPTO COUPLER
H311 LED3MM LED
H314 TLP3906 TLP3906
N201 LT4320N6 DIL08
N221 LT4320N6 DIL08
N301 LM2903N DIL08 COMPARATOR
PAD1 3,17/1,3 THROUGH-HOLE PAD
PAD2 3,17/1,3 THROUGH-HOLE PAD
PAD3 3,17/1,3 THROUGH-HOLE PAD
PAD4 3,17/1,3 THROUGH-HOLE PAD
R100 220k CMF-55
R101 2k2 CMF-55
R102 330R CMF-55
R103 18k0 CMF-55
R104 3k3 CMF-55-13MM
R105 TBD CMF-55-13MM
R106 TBD CMF-55
R107 220R CMF-55-13MM
R108 47R0 CMF-55
R111 1k0 CMF-55
R112 2k2 CMF-55
R113 680R CMF-55+9MM
R114 10R0 CMF60-ON-LUG
R115 220k CMF-55
R116 100k CMF-55
R117 1k0 CMF-55-13MM
R118 1k0 CMF-55
R119 925R CMF-55-13MM
R126 10R0 CMF-55
R141 68R0 CMF-55
R142 68R0 CMF-55-13MM
R143 47R0 ERA6A 24R9, 100V, 125mW, 0.1%, 25ppm, 0805
R144 47R0 ERA6A 24R9, 100V, 125mW, 0.1%, 25ppm, 0805
R145 0R68 ERX-3SJ
R146 0R68 ERX-3SJ-ON-LUG
R147 0R62 ERX-3SJ
R148 NP ERX-3SJ-ON-LUG
R151 0R33 ERX-3SJ
R152 0R33 ERX-3SJ-ON-LUG
R153 0R33 ERX-3SJ
R154 18k0 CMF-55-13MM
R155 NP ERX-3SJ-ON-LUG
R202 180R CMF-55
R203 0R1 MPC74
R204 0R1 MPC74
R207 10k0 CMF-55
R211 332R CMF-55
R212 75R0 CMF-55
R213 200R RTRIMT93YA Trimm resistor
R214 68R1 CMF-55
R215 10k0 CMF-55
R222 180R CMF-55
R223 0R1 MPC74
R224 0R1 MPC74
R227 10k0 CMF-55
R231 332R CMF-55
R232 75R0 CMF-55
R233 200R RTRIMT93YA Trimm resistor
R234 68R1 CMF-55
R235 10k0 CMF-55
R236 10R0 CMF-55
R301 1k0 0207/10 RESISTOR, European symbol
R302 4k7 0204/7 RESISTOR, European symbol
R303 10k0 0204/7 RESISTOR, European symbol
R304 200k 0204/7 RESISTOR, European symbol
R305 100k 0204/7 RESISTOR, European symbol
R306 1M0 0204/7 RESISTOR, European symbol
R307 4k7 0204/7 RESISTOR, European symbol
R308 100k 0204/7 RESISTOR, European symbol
R311 100k 0204/7 RESISTOR, European symbol
R312 200k 0204/7 RESISTOR, European symbol
R313 1M0 0204/7 RESISTOR, European symbol
R314 10k0 0204/7 RESISTOR, European symbol
R1001 8D20 CL60
V101 KSA992 TO92-ECB
V102 1N4148 DO35-7 DIODE
V103 1N4148 DO35-10 DIODE
V104 KSC3503 TO126V
V105 KSA992 TO92-ECB
V111 BC547C TO92-CBE
V201 STP110N8F6 STP110N8F6
V202 STP110N8F6 STP110N8F6
V203 STP110N8F6 STP110N8F6
V204 STP110N8F6 STP110N8F6
V211 1N4004 DO41-10 DIODE
V212 BD139 TO126AV NPN TRANSISTOR
V221 STP110N8F6 STP110N8F6
V222 STP110N8F6 STP110N8F6
V223 STP110N8F6 STP110N8F6
V224 STP110N8F6 STP110N8F6
V231 1N4004 DO41-10 DIODE
V232 BD140 TO126AV PNP TRANSISTOR
V301 27V DO35Z10 Z-Diode
V321 STP110N8F6 STP110N8F6
V322 STP110N8F6 STP110N8F6
W111 WIRE CMF-55+9MM
X101 22-27-2021-02 6410-02 CONNECTOR
X111 64900421122 64900421122 WR-MPC4 4.20mm Male Dual Row Vertical Header, 4 Pins=>Code : Con_WTB_MPC4_2_PCB_64900421122
X144 64900421122 64900421122 WR-MPC4 4.20mm Male Dual Row Vertical Header, 4 Pins=>Code : Con_WTB_MPC4_2_PCB_64900421122
X201 PIN262409-1 62409-1 Flachstecker Typ Tyco/Electronics/AMP TAB, FASTON
X202 PIN262409-1 62409-1 Flachstecker Typ Tyco/Electronics/AMP TAB, FASTON
X203 PAD2MM
X204 PAD2MM
X211 64900421122 64900421122 WR-MPC4 4.20mm Male Dual Row Vertical Header, 4 Pins=>Code : Con_WTB_MPC4_2_PCB_64900421122
X221 PIN262409-1 62409-1 Flachstecker Typ Tyco/Electronics/AMP TAB, FASTON
X222 PIN262409-1 62409-1 Flachstecker Typ Tyco/Electronics/AMP TAB, FASTON
X223 PAD2MM
X224 PAD2MM
X231 64900421122 64900421122 WR-MPC4 4.20mm Male Dual Row Vertical Header, 4 Pins=>Code : Con_WTB_MPC4_2_PCB_64900421122
X321 PIN262409-1 62409-1 Flachstecker Typ Tyco/Electronics/AMP TAB, FASTON
X322 PIN262409-1 62409-1 Flachstecker Typ Tyco/Electronics/AMP TAB, FASTON
X323 PAD2MM
X324 PAD2MM
X1001 PIN262409-1 62409-1 Flachstecker Typ Tyco/Electronics/AMP TAB, FASTON
X1002 PAD2MM
X1003 PAD2MM
X2011 SK104 SK104 HEATSINK manufacturer Fischer/distributor Buerklin
X2031 SK104 SK104 HEATSINK manufacturer Fischer/distributor BuerklinAttachments
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Here is a nice tool for making perfect wire crimps on the Molex connectors.
The SLB (Smooth Like Butter) Active Rect/CRC/Cap Mx Class A Power Supply GB
The SLB (Smooth Like Butter) Active Rect/CRC/Cap Mx Class A Power Supply GB
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X, those look nice, I picked up a similar pair of the Engineer PA-20s: Engineer Inc PA-20 Precise Universal Wire Terminal Crimping Tool - Pliers - Amazon.com. These replaced my pair of ratcheting crimpers that never seemed work to get both the insulation and conductor crimped properly at the same time. 2 crimps per termination, but less ruined contacts.
These also have to be done as two separate operations. Vunce also recommended the Engineers which are made in Japan. I got these because they were half the price and were delivered next day for free on Amazon Prime. They work well enough for the price.
I have word from DHL that the ABBB prototype board should be arriving this Monday. Both Vunce and myself are geared up with a BOM and ready to go. We will try to document the build as much as possible to provide a detailed build thread.
Hi X, that is a good idea seeing the interest in your ABBB design.
We look forward to seeing the thread evolve. All will be satisfied if it even gets close to a 6L6 build guide. No pressure though.
We look forward to seeing the thread evolve. All will be satisfied if it even gets close to a 6L6 build guide. No pressure though.
