here is how mine is done, once the cases are added the chassis earths will terminate on the other side of the C/R you can see on the floor. This will all be inside the PSU case, it's a 3 box affair.
larger image
http://farm9.staticflickr.com/8507/8394757806_a548611c3e_b.jpg
An externally hosted image should be here but it was not working when we last tested it.
larger image
http://farm9.staticflickr.com/8507/8394757806_a548611c3e_b.jpg
Using 4.7n will limit the BW to around 1Mhz (otherwise near 2.5Mhz (about)). I do not think that this is a problem 🙂 the actual regulation is done by the shunt (and that one is a max speed).
Hi , thanks for confirming that . I was ready and did connect via a 10R resistor to start chasis but then disconnect it as per Franz guide. I will re- do it.
Here is a picture of my build. Suggestions for groundings? Currently still humming and more on the L channel ( measured 6V on pin6 of IC and test point of 6800uf capacitor).
Something is wrong, if you have 6v on the 6800uf cap. It should only be around 0,5v🙂
Something is wrong, if you have 6v on the 6800uf cap. It should only be around 0,5v🙂
Yeah, as communicated previously with Alfred and the suggestions was to wait for a few days to see if it is going to settle down. My other channel measures only 0.5V. I am not sure where to look at ? Input transistors?
quan
See Mpp #7730 and the building guide.
These are the most important/relevant messages regarding PSU and Pre-Reg.
- Mpp #4375 PSU-pre-regulator.
- Mpp #4610 V2 Schemas UPS and Amp.
- Mpp #6506 CCS fine-tuning.
- Mpp #6462 PSU with my notes.
- Mpp #6809 Do not try to feed the CVS of the CCS of the shunt with a regulated power supply.
- Mpp #7127 More about transformer selection.
- Mpp #7635 Single and dual transformer wiring (also corrected drawing) (See also #7733).
- Mpp #7733 Grounding (PSU, RIAA and Player).
- Mpp #7810 35V PSU for the CroMagnon.
- Mpp #7830 The PSU explained.
- PradiseBuilders #13 Schema's and assembly guide.
- PradiseBuilders #155 Vdc input voltage minimum simulated.
- PradiseBuilders #970 PSU oscillates; posible solutions?
- PradiseBuilders #983 Compensating the PSU for oscillations.
- PradiseBuilders #1130 Updated 'Paradise R3 assembly guide'.
Here is Sketch of bus of stars
this is if you use 2 box set up
the input and output cables sockets must be isolated from the enclosure as those are grounded on the PCB
This means that 4 wires came from cartridge and all 4 are isolated from the ground
this is if you use 2 box set up
the input and output cables sockets must be isolated from the enclosure as those are grounded on the PCB
This means that 4 wires came from cartridge and all 4 are isolated from the ground
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For grounding less is more
as using to many cables introduce a loop as cables lengths and resistances different this will cause a small difference in voltages that can be amplified
so one cable to one common point is the solution.
as using to many cables introduce a loop as cables lengths and resistances different this will cause a small difference in voltages that can be amplified
so one cable to one common point is the solution.
Add turntable and pre amplifier
For the turn Table this is normally double insulated same as to say it does not have a ground on the mains plug
so the screen wire for the arm is connected to the grounding lug on the chassis
This make a really convenient place where to connect the ground cables from the phono boards
For the turn Table this is normally double insulated same as to say it does not have a ground on the mains plug
so the screen wire for the arm is connected to the grounding lug on the chassis
This make a really convenient place where to connect the ground cables from the phono boards
Same cartridges use the left cold wire as ground as well but this is as far as I know for MM cart so no problems
And is your TT got a ground cable on the mains plug you don't need the connection to the ground lug (main rule for avoiding ground loops is use only one cable to each point)
So use insulated plugs or if those are not get your snips and cut the screen cable as the metal enclosure will became your wire.
And is your TT got a ground cable on the mains plug you don't need the connection to the ground lug (main rule for avoiding ground loops is use only one cable to each point)
So use insulated plugs or if those are not get your snips and cut the screen cable as the metal enclosure will became your wire.
Lets see what happens with normal cables when you connect Paradise to pre amplifier.
You get 2 relay nice and juicy ground loops
As normal cables have a signal wire (hot) and a screen connected to both plugs
so again snip snip the screen at the pre amplifier end as this is connected to the mains with the ground cable on the plug
Do not disconnect the mains earth cable on the plug as this is there for your own safety
One can go further and squiggle the amplifiers on the drawings but I think I bored you already so ....
You get 2 relay nice and juicy ground loops
As normal cables have a signal wire (hot) and a screen connected to both plugs
so again snip snip the screen at the pre amplifier end as this is connected to the mains with the ground cable on the plug
Do not disconnect the mains earth cable on the plug as this is there for your own safety
One can go further and squiggle the amplifiers on the drawings but I think I bored you already so ....
Mains ground to star/chassis-ground connection needs to be decoupled (DDCR) otherwise the mains-ground in the player connected to the player chassis will form a ground-loop via the common-wire that connects RIAA-signal-ground with player-signal-ground. If needed (preferred it is) a separate signal-ground and chassis-ground should also be created in the player, and then you will have the proposed 6-wire RIAA to player connection.
the bill of materials says
POWER RESISTOR 3W
for R27, R29 R104, R204
does this mean MOX Resistors or what is exactly meant by Power Resistor?
thanks.
POWER RESISTOR 3W
for R27, R29 R104, R204
does this mean MOX Resistors or what is exactly meant by Power Resistor?
thanks.
A resistor with a fixed value capable of dissipating 3 watts.
Any of these Resistors | Mouser (I do prefere metal film 🙂)
