Paradise Builders

[RollE2k]

FdW: For the rgs 1K's - are 1/4W enough?

Also, what transistors are replaced with 2SK170??

 

[FdW]

Yes! The Paradise will work with the 310's but the J113's will make an improvement! This issue has been discussed here and in the Mpp thread before
These are the most important/relevant messages regarding PSU and Pre-Reg.

1. Mpp #4375 PSU-pre-regulator.
2. Mpp #4610 V2 Schemas UPS and Amp.
3. Mpp #6506 CCS fine-tuning.
4. Mpp #6462 PSU with my notes.
5. Mpp #6809 Do not try to feed the CVS of the CCS of the shunt with a regulated power supply.
6. Mpp #7127 More about transformer selection.
7. Mpp #7635 Single and dual transformer wiring (also corrected drawing) (See also #7733).
8. Mpp #7733 Grounding (PSU, RIAA and Player).
9. Mpp #7810 35V PSU for the CroMagnon.
10. Mpp #7830 The PSU explained.
11. Mpp #8386 My resistor recommendation’s.
12. My Paradise #56 PSU Noise.
13. Masterpiece #951 That's not a PSRR test (it's a CIR test)
14. PradiseBuilders #13 Schema's and assembly guide.
15. PradiseBuilders #155 Vdc input voltage minimum simulated.
16. PradiseBuilders #970 PSU oscillates; posible solutions?
17. PradiseBuilders #983 Compensating the PSU for oscillations.
18. PradiseBuilders #1173 Fixing oscillations (up to #1182).
19. PradiseBuilders #1322 Fuse .
20. PradiseBuilders #1387 Updated Paradise R3 assembly guide (Also German).
21. PradiseBuilders #1403 Capacitors bad vs good.
22. PradiseBuilders #1593 PSU Power Transistor selection.
23. PradiseBuilders #1644 PSU Output Impedance.
24. PradiseBuilders #1680 PSU Power Supply Suppression Ratio(PSSR).
25. PradiseBuilders #1772 NJF selection for the PSU.
26. PradiseBuilders #1887 Empirical NJF Rgs determination.
27. PradiseBuilders #2127 More about the PSU fets (J113's etc).

Have a look at these and their following messages.

 

[RollE2k]

So i take it that the J310's is possible to replace with 2sk170 and J113, but the latter is recommended?
I have already bought the J113's, so i just need the 1K resistors then, but about power rating.. i take it that it will be 1mA through it, which would make it (power wise) pretty much any resistor would be enough for it.

 

[FdW]

So i take it that the J310's is possible to replace with 2sk170 and J113, but the latter is recommended?
I have already bought the J113's, so i just need the 1K resistors then, but about power rating.. i take it that it will be 1mA through it, which would make it (power wise) pretty much any resistor would be enough for it.

Yes see also Paradise Builders #1772 (the attached picture). When using 2sk170 (replacing the PSU J310's) then Rbe should be 360 ohm (330 is o.k. ). The Rgs is to be selected for a Ids of 1mA (as you noted ).

 

[RollE2k]

Great, then i got it right.. i don't know from where i got it - but i though there was some other jfets (besides the 310's) that you was supposed to replace with 2sk170s.. but it was the same fets all the time.

Thanks alot, and i really like your summarizing posts you do once in a while

 

[FdW]

Great, then i got it right.. i don't know from where i got it - but i though there was some other jfets (besides the 310's) that you was supposed to replace with 2sk170s.. but it was the same fets all the time.

Thanks alot, and i really like your summarizing posts you do once in a while

Thanks

 

[gjfim]

All, please note the updated documents in my signature. No big changes, only small fixes so do not worry

Thank you Alfred for the posting the information. However, the links do not work for me (Server not found" Firefox can't find the server at "https). Anyone else have this problem, or only at my end?
Thanks all

 

[FdW]

Thank you Alfred for the posting the information. However, the links do not work for me (Server not found" Firefox can't find the server at "https). Anyone else have this problem, or only at my end?
Thanks all

Click the link, then remove 'http://%22https//', and it will work

 

[Marra]

Thanks Fdw that does the trick.

 

[hesener]

Thats odd. I changed the signature, hope it works now. So much for copying something from another poster, that apparently worked.....

Also added some more information on the possible JFET replacements in the PSU into the BOM.

 

[FdW]

Thats odd. I changed the signature, hope it works now. So much for copying something from another poster, that apparently worked.....

Now it works

 

[Simon1972]

I have a friend who is after a pair of pcbs to build up, preferably with group buy parts. Any version, please pm me if you have anything.

 

[amsoque]

I'm going to order another batch of BC's. I found on SOS Electronic the DIOTEC's. Are there a good choice? A tight match, as someone said? I think ordering 500+500.

Also, difficult to find the J 113.

Sooner I'll bring my PCB to an 200 MHz oscilloscope.

 

[Joachim Gerhard]

Yes, the Diotecs proved to give good matches.

 

[FdW]

I'm going to order another batch of BC's. I found on SOS Electronic the DIOTEC's. Are there a good choice? A tight match, as someone said? I think ordering 500+500.

Also, difficult to find the J 113.

Sooner I'll bring my PCB to an 200 MHz oscilloscope.

Yes, go for the DIOTEC's (I did get a batch from SOS Electronic) and they where the best Be sure to get them on tape! Mouser did supplied me with the J113's.

 

[amsoque]

Thanks guys for the answer.

GO FOR DIOTEC!!!!!!!

But 500+ 500 would be enough?

Finally I found the J113 to a supplier in Rumania.

 

[Simon1972]

yeh, you'll get a good match from those.

 

[hesener]

calvin buffer for paradise

 

[Joachim Gerhard]

Very nice.
looking forward to build it with your PCB.

 

[FdW]

Looks great