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Old 15th January 2009, 06:39 PM   #641
Salas is offline Salas  Greece
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Quote:
Originally posted by nicoch46
Raw psu are on tipic
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Old 15th January 2009, 06:47 PM   #642
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for test your shunt, need load ?

the led you help find have Vf 1,7 ie only two?

PS

tipic
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Old 15th January 2009, 06:59 PM   #643
Salas is offline Salas  Greece
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3x 1.7V LEDs per shunt CCS as in the schematic. You can use 470R 20W dummy load resistors for test before you are going to hook up your amplifier's driver stages. They will consume 95mA and will dissipate 4.5W. I am off now, going to listen to a very good TT (Pink Triangle) and our circuits, at a friend. Gonna bring back some photos to post. See ya!
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Old 15th January 2009, 09:37 PM   #644
jonners is offline jonners  United Kingdom
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Just reporting that I have rebuilt my 'Salas RIAA' and replaced the Wima FKPs with Russian 0.3% silver/mica and Teflon caps. (Pics below). Large caps - the layout has extended further into the third dimension, with caps towering over the dead bug fets.

Wonderful improvement apparent already, although when I first switched it on the bass was so excessive I thought there must be something wrong with my wiring or with the cap values. It settled down after a while, and I concluded that it must have all been too much of a shock to the poor Russian caps - after years of slumber in a Soviet military store they are suddenly transported to England and asked to play American music through a RIAA stage designed by a Greek. Next challenge for them: Charles Lloyd, "Fish out of Water".

Happy listening to all-
John



Silver Mica - shunt RIAA caps (3 in parallel for 47nF)
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Old 15th January 2009, 09:39 PM   #645
jonners is offline jonners  United Kingdom
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Teflons - 2 in parallel for series RIAA caps.
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Old 15th January 2009, 09:59 PM   #646
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Happy listening to you john
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Old 16th January 2009, 12:53 AM   #647
Salas is offline Salas  Greece
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Quote:
Originally posted by jonners
Teflons - 2 in parallel for series RIAA caps.
What a coincidence! I just came back with a couple of those! I want to try them for inter stage coupling in the RIAA. You are appointed as the official burn in authority and sonic compatibility reporter before I remove the CCCP Polysterenes and try those. Please let me know if I must do the operation doc!
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Old 16th January 2009, 01:01 AM   #648
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Jonners-

Where in the circuit are you using these russian caps exactly?
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Old 16th January 2009, 01:39 AM   #649
Salas is offline Salas  Greece
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Default Think Pink

Wow! How nice our circuits passed music from this nice TT... Cool stuff.

Click the image to open in full size.

clearaudio CONCERTO on Roksan Tabriz picked up vinyl grooves really well...

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Wooden cool On Tabriz

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A really well made arm. Smells Japanese OEM?

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Back to ole British shores, Origin Live DC motor mod PSU.

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Old 16th January 2009, 03:58 AM   #650
iko is offline iko  Canada
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Nice pics! And... how was the sound? Any comparisons with something else?
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