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Old 14th February 2005, 03:32 PM   #1
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Default Slones Totem Pole Design

I have recently built an OPTIMOS design from G. Randy Slone's "The Audiophiles Project Sourcebook" which I am very happy with. I am considering building Randy Slones Totem Pole design as my next project. I was wondering if anyone could provide more information on this design? Has built one and compared it the OPTIMOS? Or has anyone got any thoughts about the performance of this design?

I understand it is capable of 800W and uses 4x 2sk1058 and 42sj162 per channel

Goodlife
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Old 16th February 2005, 11:37 AM   #2
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For those who are interested. I have been in contact with Mr Slone and he has provided me with the following information.

The Totem Pole's practical range is 100W to 600W. (ie 50 to 105 volt rails). This is dependant on whether you use single-die or double-die L-MOSFET's (ie 2sj162, 2sk1058 or BUZ901CDP, 906DP).

At lower power levels (i.e. 100 to 200-watts), the RIAA THD will drop to around 0.0007%. At 600-watt RMS outputs, the RIAA THD is approx. 0.004% (which is pretty amazing at such high power levels)

The Totem Pole design includes an Integrated Overload Protection circuit which is relatively new to his designs.

Hope others find this information useful

Goodlife
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Old 16th February 2005, 04:19 PM   #3
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could you possibly post the schematic
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Old 16th February 2005, 06:25 PM   #4
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Will have to check with Mr Slone first. Will get back to you.

Goodlife
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Old 17th February 2005, 02:53 PM   #5
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thanks
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Old 18th February 2005, 04:44 AM   #6
bvp9223 is offline bvp9223  United States
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You can just go to his website at
www.sealelectronics.com
for the schematic.
If you can, run it on pspice before building it. Good luck.
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Old 18th February 2005, 11:17 AM   #7
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The "Totem Pole" design is not listed on any website. Mr Slone emailed me the schematic. I am planning on making a PSPICE model of it when I figure out how to use PSPICE.

Goodlife
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Old 22nd February 2005, 04:26 AM   #8
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Hi,

I have built 2 x 135W Optimos (still need to be housed in proper enclosures). I am in the process of building a pair of 400W Optimos monoblock.

The amps sound fantastic and I basically think they are as good as a solid state amp can sound. Indeed, one day when I complete my amps, I am very interested in having an open invitation to anybody who own a Krell, Mark Levison, Gryphon, Halcro or any super commercial amps to come to my place to have a A/B comparison. I won't be surprised if the result is that the Optimos sounds as good or better - I have listened to those amps before, just haven't done any A/B comparison and they were connected to different speakers in different rooms, etc.

Anyone who lives in Sydney interested? Drop me an email!

How different the Totem Pole is from the Optimos? My guess is that they would be similar since I don't know how the Optimos can be improved. Of course, the Totem Pole has more power, and possibly more protection circuits built in.

I think I am contend with the Optimos and won't need the Totem Pole for the time being. Nevertheless, I am always interested in Mr. Slone's new design.

Regards,
Bill
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Old 14th March 2005, 03:52 PM   #9
sam9 is offline sam9  United States
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www.sealelectronics.com shows up as an expired url and the domain registeris offering for sale. Does anyone know if this means Slone no longer selling his products, or what?
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Old 14th March 2005, 05:12 PM   #10
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Mr Slones products are available through

bradwilson@telus.net (North American Distributor)

And through

http://ledeaudio.com/index.html
lede@bigpond.net.au
(Australian Distributor)

Don't know why his website is no longer in use. I know he has stopped doing direct sales through it.
If anyone is interested in building his designs Randy Slones email address is:
sealelec@mikrotec.com

I recently contacted him regarding his OPTIMOS Totem Pole design and he sent me a .pdf of the schematic free of charge. I've haven't actually built it yet as I've managed to get side tracked with a different project.

I have found Mr Slone to be a really nice bloke and I am thoroughly satisfied with the OPTIMOS I built. I highly recommend his products.

Laters Goodlife
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