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Old 25th July 2008, 10:14 AM   #291
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I builded the PS "inside " the box , it seems not causing problems at all .
It is based on a fet voltage follower regulated by zeners .

Some components in this work are mounted under the perforboard ..
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Old 25th July 2008, 10:19 AM   #292
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Anyway I didnt finished to work on it as you can see there is lack of input and selector connections . I was too busy in listening to it , and mainly arranging the ground .

I have found the less noise connectin both input and output RCA ground to the chassis . The circuit ground goes to the chassis throgh the output point .

It seem to me perfectly quiet , which I consider a luck since the circuit is p2p builded .
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Old 25th July 2008, 10:24 AM   #293
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last one of the same show .... .

Oh the pot . Buyin lots of cheap stereo pots it is possible to find one with good resistence balance/tracking between the channel . Or use it
mono s .
My value is 22 k .
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Old 25th July 2008, 10:50 AM   #294
hates ground loops
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Nice little "pre".
Are these RCA sockets from Futurlec? http://www.futurlec.com/RCA-ChassIns.shtml

Iff they are, can you comments on quality? Do they stay in place with just one nut?
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Old 25th July 2008, 11:00 AM   #295
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Quote:
Originally posted by Rodeodave
Nice little "pre".
Are these RCA sockets from Futurlec? http://www.futurlec.com/RCA-ChassIns.shtml

Iff they are, can you comments on quality? Do they stay in place with just one nut?
Cant say where are they from , a local store sold me them , but they are pretty much the same and ok they stay in place without efforts .
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Old 25th July 2008, 01:55 PM   #296
udailey is offline udailey  United States
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Default Futurelec

WOW, that Futurelec is really inexpensive. Great site and thanks for the link!
Uriah

edit: I know most of us if not all dont use tantalum caps, but check out this article HERE
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Old 25th July 2008, 03:25 PM   #297
massimo is offline massimo  Italy
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Default Re: Futurelec

Quote:
Originally posted by udailey
WOW, that Futurelec is really inexpensive. Great site and thanks for the link!
Uriah

edit: I know most of us if not all dont use tantalum caps, but check out this article HERE
Those RCAs are made by many chinese manufacturers and sold by thousands far eastern trading companies. They all look the same and the quality is fairly good.

Tanatalum caps: only Naim, as far as I know, are (were) using those kind of rabbish in audio. Very unrealiable.
In cellurar phones and other hi-tech/microsized devices are used throughout because of thier high size/capacitance ratio.
Zillions of caps required by the industry generated the "coltran war" that plagues Africa
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Old 25th July 2008, 05:05 PM   #298
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Default ETA

Quote:
Originally posted by Nelson Pass


I had thought just the pc board. You don't want to pay for my
chassis.


Any ETA on the PC board?
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Old 25th July 2008, 07:46 PM   #299
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I thought I had mentioned that the board is done but needs to be
fabricated and a sample build before offering them for sale. In any
case it will be soon.
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Old 25th July 2008, 07:53 PM   #300
lineup is offline lineup  Sweden
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Great you have published your B1 papers, Nelson.
thanks.

Keeep on going oldtimer. (although I am tiny bit older born in May 1951)
Very nice to see age is not something that can kill off creativity.
Good hope for all young audio diy guys.
This hobby is something they can do for very long time.
Maybe until their final breath .. on that Very Last Day

Lineup - now waiting for the investigations and findings that Mr Pass will do in B2
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