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Old 16th September 2012, 11:26 PM   #11
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An F5. Not that big but for a tube guy pretty big. I'd never build a tube amp like the one in the second picture. That's not big, that's huge and crazy and awesome....and kinda stupid too. Dr Frankenstein was mad, you know....
Looks like Dr. Frankenstein should have invested in some non-marking wheels for his super tube amp thingy...

check out the very bottom of the pic!

Click the image to open in full size.

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Old 16th September 2012, 11:37 PM   #12
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This is my biggest pcb , valve pre stage with 1600 watts of mosfet power.
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Last edited by Pano; 16th September 2012 at 11:51 PM. Reason: oversized photo
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Old 16th September 2012, 11:52 PM   #13
Pano is offline Pano  United States
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Nigel, be kind, please resize. Read this:
Pictures -- Why Not attach Them ??
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Old 17th September 2012, 12:21 PM   #14
Cassiel is offline Cassiel  Libya
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And while you're at it resize your amp wattage too. Haha.

Quote:
check out the very bottom of the pic!
Looks like we have a giant with feet of clay. Those Chinese wheels can't take that load! Just imagine a flat tire. Haha. Potential tragic consequences.
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Old 17th September 2012, 12:48 PM   #15
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Those Chinese wheels can't take that load! Just imagine a flat tire.
Recently the Big Dumb Blonde One stacked about 150 seven pound OPT's on a small flatbed cart. I got them into the house and almost to their destination when I got the "flat". After the OPT's were scattered all over the floor, the label was obvious "maximum load 350 Lbs". The failure was shearing of the pin that is the axle for the tire, followed by the bending of the base plate.
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Old 17th September 2012, 12:58 PM   #16
Cassiel is offline Cassiel  Libya
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"maximum load 350 Lbs".
Glad your feet are OK.

I wonder about the weight of that amp. Description says it has 21 transformers.
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Old 18th September 2012, 12:07 PM   #17
Itsmee is offline Itsmee  England
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Does anyone know if there is a taller domestic amplifier than these?

Not speakers - My Photo Gallery

I remember speaking to the designer Colin Wonfor, the largest was 500 Watts single ended class A, the output stage was unusual in that it was a mixture of bipolar and FET, if I remember correctly, the bipolar was used for the CCS, while the FETs did the driving.
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Old 18th September 2012, 12:22 PM   #18
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Click the image to open in full size.

Last edited by Pano; 18th September 2012 at 12:30 PM. Reason: fixed image link
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Old 18th September 2012, 01:19 PM   #19
Krisfr is offline Krisfr  United States
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A 20 output device MJ15023/24 746 watt Leach inspired amp, with plus and minus 120 volt rails from 2 Dunlap Clarke 1000 transformers. Ramped up with a 25 amp Variac. It had 4 8 inch 20,000 uf 250volt GE caps on each rail. I wish I had a picture to see this myself right now. While testing it would scramble up the uhf band on my kids TV. It took me a while before I realized the amp was causing the interference.
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Old 18th September 2012, 01:59 PM   #20
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Quote:
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A 20 output device MJ15023/24 746 watt Leach inspired amp, with plus and minus 120 volt rails
If not the most Stupendous, my vote's for the most stupid power amp ever.
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