Finally, an affordable CD Transport: the Shigaclone story

[intense-tavda]

another one

[woodturner-fran]

Hi Fran

Ask Peter he may have one in stock.

Will do - although i did send him an email last week and haven;t heard anything. Maybe he is away or something at the moment. i'll wait a little longer in case he's out of contact ...

Fran

[Tripmaster]

Peter is normally quick with replies so I guess he is away at the moment.

[JC Fardo]

Hi

Could you please shigacloners advise about PS fuse protection values

Thanks

[IMG]PS[/IMG]

JC

[kevinkr]

Helps to know your line voltage.. I'm using a 1A slow blow with a 50Va power transformer on 120V/60Hz. Transformer is a EI type, toroids may require a slightly larger fuse or a time delay type to prevent nuisance blowing.

[JC Fardo]

Originally posted by kevinkr
Helps to know your line voltage..

That´s the same in my area, 120V/60Hz.

Thanks

JC

[kevinkr]

Given the load you would probably be just fine with a 1A slow blow.. You might even get away with less.

[intense-tavda]

Hi there!
I use 2 x 850ma slow blow, no problems at all. Teake

[woodturner-fran]

Hi all,

A couple of questions:

1. Is there anything wrong with using the original transformer that came with the EZ-31 in the new power supply, or is it an inherently bad transformer?

2. I can't get the blackgate N 10uF/50v (out of stock) so I went for a 33uF N instead. Anyone see any issues with that?

3. Has everyone mounted their PS in a separate box or is it OK do you think to fit it all in the one chassis?

4. I have a LM7808 in what seems to be a slightly smaller size package than the regular TO220, but still in the same shape package (ie not like a TO-92). I'm guessing that it won't carry the 1A that a TO220 normall would. What kinda current does the shigaclone carry normally? I have big heatsinks I can put on this one....


TIA,

Fran

[kevinkr]

Originally posted by woodturner-fran
Hi all,

A couple of questions:

1. Is there anything wrong with using the original transformer that came with the EZ-31 in the new power supply, or is it an inherently bad transformer?

2. I can't get the blackgate N 10uF/50v (out of stock) so I went for a 33uF N instead. Anyone see any issues with that?

3. Has everyone mounted their PS in a separate box or is it OK do you think to fit it all in the one chassis?

4. I have a LM7808 in what seems to be a slightly smaller size package than the regular TO220, but still in the same shape package (ie not like a TO-92). I'm guessing that it won't carry the 1A that a TO220 normall would. What kinda current does the shigaclone carry normally? I have big heatsinks I can put on this one....


TIA,

Fran

Yeah,
The small transformer results in a slight reduction of dynamics, and bass "slam" - it's subtle but after repeated listening tests I swapped the convenient little stock transformer for the much larger and quite inconvenient 50Va transformer that is now in the Clone.

Regarding the cap it is probably controlling a servo time constant, without checking I can't be sure - while not absolutely critical it is probably a good idea to stick close to the original value.

My psu is in the same chassis with the rest of the transport, but I have a fairly big box. Mounting it close means there is less IR drop across wiring which helps to lower supply impedance, but also means there will be a magnetic field and mechanical vibration in the vicinity of the mechanism. I did not notice any difference when I moved my transformer around, but I do have nearly 12lbs of mass the mechanism is bolted to..

Not sure about your LM7808, I would get an LM7808 in a TO-220 package if for no other reason than the motor starting currents are quite large. You might have a 500mA version of the regulator..