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Old 15th October 2004, 12:11 AM   #1
jrsun is offline jrsun  United States
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Default winterization 2004

my mono blocks of Aleph-X and heater
great thanks to Mr. Nelson for his intelligence and kindness
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Old 15th October 2004, 12:13 AM   #2
EUVL is offline EUVL  Europe
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Are there any pictures missing ?


Patrick
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Old 15th October 2004, 12:13 AM   #3
jrsun is offline jrsun  United States
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top pic
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Old 15th October 2004, 12:14 AM   #4
jrsun is offline jrsun  United States
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Old 15th October 2004, 12:20 AM   #5
jrsun is offline jrsun  United States
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inside pic
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Old 15th October 2004, 01:03 AM   #6
jrsun is offline jrsun  United States
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forgot to mention Greg etal whoever contributed to Aleph-X project and my friend Michael who helped me to make the group purchase of enclosures possible.

more spec
660VA transformer
CRC pi filter
12 irf240, 4x68000uf capacitor per ch
total bias 5A (limited by VR used for the time being)
so 100+ watts ?
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Old 15th October 2004, 02:15 AM   #7
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Nice job Russell. You gave me some ideas. Did you have any of those chassis left for my damaged one?
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Old 15th October 2004, 02:15 PM   #8
jrsun is offline jrsun  United States
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correction: should be Grey !

After initial listening, sound pretty good, not even break-in yet
Thanks Grey!

Advice needed here
DC offset probelm observerd: the DC offset is adjusted when amp stand alone, no problem at all (high absolute DC when cold, low when it is warm, relative DC is stable all the time 15mv to 40mv) But when the preamp (ARC LS-3B) plus in, the relative DC go up to 0.9 V when it is cold and down to 80mv-150mv when it is warm. Any suggestion ?
1. adjust DC offset with Pre plugged in ? not preferred
2. does the additional DC from the pre-amp ? how to block it ?

Thanks!
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Old 18th October 2004, 05:15 PM   #9
jrsun is offline jrsun  United States
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After time-consuming reaging thru the pots, looks like I'm not the only one have this problem. Anyhow, the sound is vry very good !
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Old 18th October 2004, 09:19 PM   #10
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As for whether DC is coming out of your preamp, you'll have to determine that on your end. You can put DC blocking caps in the inputs of the Aleph-X and it will stop anything coming in from that end.

Grey
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