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OPTI-MOS PAT 14th March 2004 07:03 PM

Hi from Canada
HI I am a newbie at this hole thing, forums and amplifier building so I will make mistakes for a while. I live just north of Toronto. I am an automotive tech by trade and doing this as a hobby. I am building two of Randy slone's Opti-Mos amplifiers. I have built both modules and speaker protection board and now am going to order my power supply. I will post some pictures when I figure out how, if any one would like to see them?

Gaucho 16th March 2004 02:46 AM

I would like to see some pic's of your project, I have G. Sloan's book but opted to build some Pass Labs Alephs instead. Did you purchase any PCB's or other parts form Mr Sloan?



OPTI-MOS PAT 16th March 2004 07:17 PM

2 Attachment(s)
Here are some pictures of what I have completed so far. I just ordered my power supply(750VA toridal transformer and a low impedence power supply board with 80,000uf from Randy Slone) real nice board I will post pictures as soon as I get it.

OPTI-MOS PAT 16th March 2004 07:53 PM

2 Attachment(s)
Here is the other picture................

By the way Gaucho I am from the bush, where is in the park?:D

OPTI-MOS PAT 16th March 2004 07:59 PM


Did you start to build, or are you undecided? I would like to know about your project.....

Gaucho 16th March 2004 10:45 PM



Did you start to build, or are you undecided? I would like to know about your project.....
My Pass Labs project (Aleph 4 built as mono-blocks) still reguires completion of the cases as they need top covers and face plates. They have been up and running for awhile now. I built it from the service manual schematic taken from

Your amp looks good. Did you pirate the case from a comercial product?


By the way Gaucho I am from the bush, where is in the park?

I am also a Trades Person. I am currently taking my third year of schooling for my electrical apprenticeship.


OPTI-MOS PAT 17th March 2004 01:48 AM

The case I'm using for now used to be a 5 disk cd player that never worked good from new, the aluminum plate is from a car amp. My plan is to build a 1.2 KWatt RMS 6 channel monster amp in one inclosure.:devilr:

Do you have any pictures?


Gaucho 17th March 2004 02:54 AM

2 Attachment(s)

Here's shot of one of the channels. I slapped some angle aluminum together to make some poor man's heatsinks it's a little crude but it works.


Gaucho 17th March 2004 03:40 AM


Here's a link to the service manuals for the Alephs amps.;)

OPTI-MOS PAT 18th March 2004 06:37 AM


Thatís pretty cool, must have taken you a long time to build those heat sinks. I read the manual you posted and wow that amp runs hot!!! How does your amp run with those heat sinks? Shipping weight 110lbs??? You donít have much to finish it. Are you happy with it?

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