winterization 2004

jrsun · 15th October 2004, 12:11 AM

my mono blocks of Aleph-X and heater
great thanks to Mr. Nelson for his intelligence and kindness

EUVL · 15th October 2004, 12:13 AM

Are there any pictures missing ?

Patrick

jrsun · 15th October 2004, 12:13 AM

top pic

jrsun · 15th October 2004, 12:14 AM

front pic

jrsun · 15th October 2004, 12:20 AM

inside pic

jrsun · 15th October 2004, 01:03 AM

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 ?

kilowattski · 15th October 2004, 02:15 AM

Nice job Russell. You gave me some ideas. Did you have any of those chassis left for my damaged one?

jrsun · 15th October 2004, 02:15 PM

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!

jrsun · 18th October 2004, 05:15 PM

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 !

GRollins · 18th October 2004, 09:19 PM

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

15th October 2004, 12:11 AM	#1
jrsun diyAudio Member Join Date: Sep 2003 Location: North NJ	winterization 2004 my mono blocks of Aleph-X and heater great thanks to Mr. Nelson for his intelligence and kindness

15th October 2004, 02:15 AM	#7
kilowattski diyAudio Member Join Date: Aug 2003 Location: Long Island, New York	Nice job Russell. You gave me some ideas. Did you have any of those chassis left for my damaged one? __________________ ----------------------------------------------- Kilowattski

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15th October 2004, 12:13 AM	#2
EUVL diyAudio Member Join Date: Oct 2003	Are there any pictures missing ? Patrick

15th October 2004, 01:03 AM	#6
jrsun diyAudio Member Join Date: Sep 2003 Location: North NJ	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 ?

15th October 2004, 02:15 PM	#8
jrsun diyAudio Member Join Date: Sep 2003 Location: North NJ	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!

18th October 2004, 05:15 PM	#9
jrsun diyAudio Member Join Date: Sep 2003 Location: North NJ	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 !

18th October 2004, 09:19 PM	#10
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	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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