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Old 4th August 2012, 06:25 PM   #841
jprco is offline jprco  Canada
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Just got the 2 boards and they look great. I've been through the build guide and searched this tread to find out what the C R Z link is on the board? I may have missed it but can you point me to the right spot for some info. Thanks.
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Old 4th August 2012, 06:29 PM   #842
naf is offline naf  Indonesia
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Quote:
Originally Posted by jprco View Post
Just got the 2 boards and they look great. I've been through the build guide and searched this tread to find out what the C R Z link is on the board? I may have missed it but can you point me to the right spot for some info. Thanks.
read build guide on sub topic of ideas and alternatives
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Old 4th August 2012, 06:58 PM   #843
jprco is offline jprco  Canada
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Found it, thanks naf!
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Old 15th August 2012, 04:36 AM   #844
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Default Dual Mono with just one transformer?

What do you think of this?
Virtural Dual Mono adaptation
Power board looks like:
Bridge-Rectifier, 3,300uF, PI-Resistor, 10,000uF, 0.1uF
Bridge-Rectifier, 3,300uF, PI-Resistor, 10,000uF, 0.1uF
Output end of power board has 2 of 16A Schottky or Fast Silicon for V+
Output end of power board has 2 of 16A Schottky or Fast Silicon for V-
V+ diodes at output point at amp board. There's 1 for left and 1 for right.
V- diodes at output point at power board. There's 1 for left and 1 for right.
Adding a pair of Cornell LP 2,200uF (high efficiency signal grade) very nearby the left channel amp board, And another pair of Cornell LP 2,200uF very nearby the right channel amp board.
Left speaker return cable is centerpoint of the 2,200uF caps at the left channel amp board.
Right speaker return cable is centerpoint of the 2,200uF caps at the right channel amp board.
Input system is with 4 pole rotary for source selector, insulated RCA jacks, and 4 conductor cable (2 conductors for left input, 2 conductors for right input).
There's Dual Mono, 2 individualized channels, only 1 transformer to buy?
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Old 15th August 2012, 04:37 PM   #845
AndrewT is offline AndrewT  Scotland
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I would not do that.
What's a Pi resistor?
Why two schottky after the caps?
Why more diodes at amp board?
Why cornell caps between PSU and amplifier?
Why speaker return connected to a dirty ground?
Why dual wiring of the interconnections?
Why one transformer for a dual mono arrangement?
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Old 16th August 2012, 10:37 AM   #846
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What's a Pi resistor?
It refers to the R in a CRC power supply. That is not directly related to virtual dual mono.

Why two schottky after the caps?
Power board has individualized left channel and right channel power outputs for both V+ and V-.
I count a total of 4 diodes added as the output of the power supply board.
diode V+ for left channel
diode V+ for right channel
diode V- for left channel
diode V- for right channel
This is the left, right splitter, diode isolated, that accomplishes the stereo separation of virtual dual mono.
It is less expensive and less complicated than individualized regulators/capmulti per left and right for virtual dual mono.

Why more diodes at amp board?
There's no extra diodes added to the amp board.

Why cornell caps between PSU and amplifier?
Pairs of high efficiency 2,200uF caps added to both amplifier boards. It is to stiffen the rails individually per left and right channels. It is unnecessary to add these caps.

Why speaker return connected to a dirty ground?
This particular virtual dual mono scheme works well with ordinary/orthodox star grounding.

Why dual wiring of the interconnections?
The V+, 0v, V- do "Y" per Left channel amplifier and Right channel amplifier at the output of the earthed power supply board. With the power board's 0v earth grounded, that is the location of central star ground. This implies simple ordinary 3 conductor power interconnect cables for each amplifier board. Individual left channel and right channel cables is because of dual mono.

Why one transformer for a dual mono arrangement?
That is because of transformer costs.
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Last edited by danielwritesbac; 16th August 2012 at 10:41 AM.
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Old 24th September 2012, 09:27 PM   #847
cobain is offline cobain  Indonesia
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Hai all
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Old 2nd October 2012, 04:14 PM   #848
ingo50 is offline ingo50  Germany
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Default Specifications of the Honeybadger

Hi all, I am new at the forum.Watching this thread I wonder about the specifications of this amp. Only given the sup.voltage, but never read about THD or risetime or
F u to Fo etc. Can one help me ? thanks all
Ingo at the center of Berlin
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Old 9th October 2012, 11:43 PM   #849
chunek is offline chunek  Singapore
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Hi all, anyone is doing Honeybadger. I am newbie and populating the board with sausages.

Click the image to open in full size.

Is it a need to match transistors? Any recommended sites to buy match transistors?
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Old 10th October 2012, 12:28 AM   #850
chunek is offline chunek  Singapore
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Most of the transistors I can get quite match with same batch. The only problem is on the driver transistors pair MJE15032G and MJE15033G from Mouser. The first has hfe 100+ and the later having 160+. Is it a problem to use it here as the different is almost >50%?
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