Hi,
can someone tell me what chip IC 903 is ?
I have that number but schematic doesn't tell me anymore and alot of links in the first part of this thread are gone, I fried this chip and found out metal shavings ,microsize had found thier way to the magnet in the lazer,must have caused it to bind and locked it in place, I file sometimes on my bench so I figured that's where they came from,,,,Any way I need a controller board,or that chip,ANY suggestions,I found some jvc rc31 boxes but they won't ship to usa from canada, THANKS ALOT!
can someone tell me what chip IC 903 is ?
I have that number but schematic doesn't tell me anymore and alot of links in the first part of this thread are gone, I fried this chip and found out metal shavings ,microsize had found thier way to the magnet in the lazer,must have caused it to bind and locked it in place, I file sometimes on my bench so I figured that's where they came from,,,,Any way I need a controller board,or that chip,ANY suggestions,I found some jvc rc31 boxes but they won't ship to usa from canada, THANKS ALOT!
200VA Trafo 12V with CT, 2x Cerafine caps 1000uF/25V, 2x MSR860, 1x LM7808, 2x Blackgates 470uF/25V and removed the ferrite spool and the 2 caps on the board and replaced by a "Red" Blackgate 33 uF/50V
Silver Cotton Jupiter Wire with 2 Allen Bradleys 300/100 and a WBT Next Gen (Gold) and a Furutech Rhodium Power Inlet with a 2K Linefilter and 2 Bybees
I was guessing at Peter's new set of mods, not Erik's (and got them right
).
I was guessing at Peter's new set of mods, not Erik's (and got them right
An educated guess....
Not really, I just installed it there assuming it's a best cap for a job, and didn't bother to compare it with anything else this time.
However, I did extensive listening tests with caps directly at the input of a DAC and V-Cap was definitely the best choice here. Some of my friends actually prefer it at the DAC's input vs. no cap at all. The new Cu version of the V-Cap, sounds a bit better too.
However, I did extensive listening tests with caps directly at the input of a DAC and V-Cap was definitely the best choice here. Some of my friends actually prefer it at the DAC's input vs. no cap at all. The new Cu version of the V-Cap, sounds a bit better too.
It is LA6541. All those chips are really hard to find.
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Hi Peter,
On the 2 latest pics you show a standard spindle against a Delrin with an Ebony Fran Puck.....do you use the latter as your own transport nowadays to judge mods or is it just an older photo...
A pity (for me) that you did a few mods in one go but I do hope that if you are in a situation to hear the original cap 906 against the V-cap that you are willing to post your findings....
I found the Wondercap in the 906 position a "huge" difference but out of stock nowadays...
On the 2 latest pics you show a standard spindle against a Delrin with an Ebony Fran Puck.....do you use the latter as your own transport nowadays to judge mods or is it just an older photo...
A pity (for me
) that you did a few mods in one go but I do hope that if you are in a situation to hear the original cap 906 against the V-cap that you are willing to post your findings.... I found the Wondercap in the 906 position a "huge" difference but out of stock nowadays...
ground scheme
If using a two prong electrical plug, where do you terminate the (star) ground.
Would a ground lug on the outside of the unit work, then connect a wire to the ground lug of the preamp (the one meant for phono)
Or is everyone using a 3 wire electrical plug (hot neutral and ground)
Thanks,
Paul
If using a two prong electrical plug, where do you terminate the (star) ground.
Would a ground lug on the outside of the unit work, then connect a wire to the ground lug of the preamp (the one meant for phono)
Or is everyone using a 3 wire electrical plug (hot neutral and ground)
Thanks,
Paul
I use 3-pin electrical plugs everywhere, but star ground is often best left unconnected to earth (this worked best for me so far anyway). I only connect the earth wire to the interwinding shield in my transformers. All my HiFi component cases are non-metal (I made them mostly of wood), so no need to ground anything else as far as I'm concerned...
I changed C908 at the same time as other caps, so can't say what that particular mod did.
In my reference Shiga transport I had always Delrin disk table, it's just that I didn't use that chassis recently and just put it back into use last week. So yes, that's what I'm using now for listening.
In my reference Shiga transport I had always Delrin disk table, it's just that I didn't use that chassis recently and just put it back into use last week. So yes, that's what I'm using now for listening.
Attachments
Link to manual was posted here: http://www.diyaudio.com/forums/digi...transport-shigaclone-story-4.html#post1471494
hi pforeman,
Most people use a 3 prong ,one reason is it's polarized and the other is it is grounded at the outlet,with a two prong you can turn it around and induce HUM sometimes, the ground should go to the case ,there is 2 grounds one for power and one for signal,In the case from a phono I would ground as near the phono preamp input as I could,and there is a common ground at the power supply,maybe others can add to this!
cheers!
Most people use a 3 prong ,one reason is it's polarized and the other is it is grounded at the outlet,with a two prong you can turn it around and induce HUM sometimes, the ground should go to the case ,there is 2 grounds one for power and one for signal,In the case from a phono I would ground as near the phono preamp input as I could,and there is a common ground at the power supply,maybe others can add to this!
cheers!
