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Old 27th January 2002, 08:35 PM   #11
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Hi All,

I think it would be a great enhancement for www.diyaudio.com to have a gallery page, similar to that on Nelson Pass's site, but for all comers. I for one love looking at others creations, amps, preamps and speakers (a picture is worth a thousand words etc ...)

How about it??

Cheers, Adrian
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Old 27th January 2002, 08:43 PM   #12
PH104 is offline PH104  United States
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Great idea.
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Old 27th January 2002, 08:50 PM   #13
sonnya is offline sonnya  Denmark
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Well... I thought it was in Hifi Fidelity i have seen them!! But i was a bit afraid of being wrong...Congratulations!!

Sonny
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Old 28th January 2002, 10:15 AM   #14
ih is offline ih
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Man, Flemming J P - they look like some serious amps. What are they capable of?

Maybe something like the PCDB would work well?
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Old 28th January 2002, 10:29 AM   #15
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They were build (not by me though) for low impedance speakers.

150 watt in 8 ohm
near 300 watt in 4 ohm
near 600 watt in 2 ohm
approx. 1000 watt in 1 ohm (the resistors went up in smoke too fast to get a proper reading)

They have a switch so they can be baised for 1 or 100 watt class A, I haven't been able to tell the difference, except for the heat.

I can't rember which transistors are used in the output stage except that they are not mofsets.
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Old 28th January 2002, 12:57 PM   #16
hifi is offline hifi  Sweden
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Nice....Whats the rating on the RIFA:s?...and the transformer?... My aleph 2 clone ways about 25-30Kg a pc (but its not fully assemblaged jet....

30x30x4cm heatsinks 2 pc per block =)) 10kg aproxx
5mm T6 Alu all around it should be used to make boats =) but then i got hold of it =) 8kg aproxx
900VA toroid audio grade 10Kg aproxx
2pc 47000F Rifa Peh169 10yers in hard use life expectancy.....
2pc 1.1mH coil about 0,7Kg a piece same as for caps...

+Some more fun stuff like remote turn on and some voltage checks (to be fed to display on preamp..whenever i get around to it..)

hmmmm ....=) i will post some pics of it when it is possible..

/micke
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Old 28th January 2002, 01:38 PM   #17
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The RIFAs are 47000uf long life, haven't read the rest. The main transformer for the output stage is a 1000VA, the smaller one on top is a approx. 500VA for the other stages.

Normaly weight is a good thing, but when moving them down from 4. floor, then it kind of sucks

Sounds like you will also end up with some solid state
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Old 28th January 2002, 01:57 PM   #18
hifi is offline hifi  Sweden
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damn then its almost 0,3F in each of those thins....damn....;-)
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Old 28th January 2002, 02:12 PM   #19
sonnya is offline sonnya  Denmark
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RIFA ... Ohhh One of the finest CAPS you can get... They are not cheap!!! I have 2 of them in my own amp... Price before VAT and Transport ... 600 - 700DKR each.

.3 Farad should keep the amp alive for some seconds!!!!! after the power have been removed!!

Sonny
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Old 28th January 2002, 03:07 PM   #20
hifi is offline hifi  Sweden
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I think ELFA is cheapest...i bougt some for 275SEK a piece + VAT thats a 47mF/63V cap....


esr 5mR =)) i got 5 of them brand new in about one meter from where i sit now....=) when im finished this post i will pick up one of them to have a look ...

/micke
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