Salas HOT ROD DCB1 - diyAudio
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Posted 15th June 2010 at 04:56 PM by Tea-Bag
Updated 27th November 2014 at 04:51 PM by Tea-Bag (added BOM)

So I am going to write some details down about the DCB1 Hynotize Hot-Rod buffer. The current production board is black, 2 oz copper and 2mm thickness. (See below) The below blue pictures are prototype boards and are not representative of the product.

Here are some of the specifics to help understand ordering parts for it etc. This is not a detailed build guide, but there is a link to one below from another forum member.

Click the image to open in full size.

They can handle 10mm pitch snap-in capacitors 25mm width capacitors.

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There are positions for smaller MUR120 type diodes OR MUR820 style TO-220 style diodes. Not both!

The vRef LEDS can now be bypassed with a 25mm Film cap or a 100uf electrolytic. The film cap by consensus is best at .22uf.

Click the image to open in full size.

The CCS resistor is now about a 28mm pitch, and can easily handle most 5 watt wirewound type of resistors.

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Note LED orientations

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Here is a build guide another member did.
It is excellent, and on audiocircle. Thanks Wushiliu

DC-Coupled B1 Buffer Build

And here is another article about the Hot-Rod DCB1 written by Corpius.


Here is a example of a balanced setup that works. Special thanks to johnwmclean and nycavsr2000 for this work.

Click the image to open in full size.

Regarding grounding of the balanced project.

FYI the signal return on both boards are connected to ground chassis via a ground loop breaker as follows;

The ground loop breaker is a 10Ω 5W resistor in parallel with a 0.1µF capacitor rated at least 250VAC. For safety this capacitor should be rated for class X or Y (good for across-the-line use) with flame retardant casing.

Just so you truly believe, here is the real deal.

Click the image to open in full size.
Nice casework, huh?
Attached Files
File Type: pdf Blue DCB1 v1.0.4.pdf (42.5 KB, 8721 views)
File Type: pdf SalasDCB1shuntreg build guide v4.1.pdf (50.7 KB, 9171 views)
File Type: pdf BOM DCB1 Oenboek.pdf (168.7 KB, 3887 views)
Posted in Uncategorized
Views 30994 Comments 1
Total Comments 1


  1. Old Comment
    Tea-Bag's Avatar
    Mesmerize Hot Rod Kit - $95.00USD, 7 domestic shipping 12.00 international shipping, board only at DiyAudio/sore

    Relay diode 512-1N4001 7
    20R R1 resistor use 2x each side for 10R hot-rod. Use 2x47r for non hot rod
    TO-220 Heat Sink 532-6043PB 1
    Nichicon Muse 100uf 5
    BC517 863-BC517G 1
    BC550C Fairchild 2
    BC560C Fairchild
    MUR220 Diode 4
    7812 511-L7812ACV 1
    relay bypass cap 505-MKS02.1/63/10 1
    Relay TQ2-12V-3 7
    header male 538-22-23-2031 7
    header female 538-10-11-2033 7
    header pins 538-08-50-0114 35
    IRFP 240 844-IRFP240PBF 2
    IRFP 9240 844-IRFP9240PBF 2
    connector block 571-1776119-3 1
    Nichicon 4700uf 35v 2
    Wima FKP2 .22 400v 5% 2
    10R Vishay-Beyershlag SFR55 2
    100R Vishay-Beyershlag MRS 25 2
    470R Vishay-Beyershlag MRS25 4
    47R Vishay-Beyershlag MRS25 6
    2.2K Vishay-Beyershlag MRS25 1
    10K Vishay-Beyershlag MRS25 1
    47k Vishay-Beyershlag MRS25 1
    220R Vishay Dale CMF55 4
    220K Vishay Dale CMF55 2
    1M Vishay Dale CMF55 2
    Matched quad 2SK170 and 6 random Toshiba NOS 2SK170 10

    LED RED 20ma 20
    LED GREEN 20ma 5
    Posted 12th May 2014 at 03:29 PM by Tea-Bag Tea-Bag is offline
    Updated 12th May 2014 at 04:23 PM by Tea-Bag
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