Paradise Builders

Jump to Latest
#2,382
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.
 
#2,383
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.
 
#2,384
RollE2k said:
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.
Click to expand...

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 🙂).
 
#2,385
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 🙂
 
#2,395
amsoque said:
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.
Click to expand...

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.
 
#2,398
calvin buffer for paradise

😀
 

Attachments

  • calvin buffer pcb.jpg
    calvin buffer pcb.jpg
    39.2 KB · Views: 360
You must log in or register to reply here.
Top Bottom