Sure,
everything should been found there
http://www.diyaudio.com/forums/group-buys/216891-paradise-phono-stage.html
Show me (one more time) a full set of voltages test-points, Vin and Vout. Also would you measure all Vak(LED's) in the CVS and the CCS and, V(be) power and small signal transistors. It seems that the PSU is working but I want to know (at a philosophical level) why it is (as it is). This will make it easier to help other people.
P.s. The MJE's should be good, also the TIP's and the D44/D45's, but the D44/D45 where my first choice
Hello all
In case anybody is interested, I just finished measuring my BC337s. These are Fairchild devices purchased on ammo tape from Mouser Canada in late November. Part number 512-BC33740TA. For compatibility with others, I used the circuit shown in Post #72. It is very easy to build with a breadboard. I used small pliers to move the transistors (not to warm them up). A fan blows air on the transistors to be tested, the breadboard and transistor under test, and my pliers, to make sure the temperature stays constant. Within at the most a few seconds, the HFE measurement is rock solid.
Results:
HFE #
550+ 14
545-550 14
540-545 45
535-540 36
530-535 14
525-530 27
520-525 37
515-520 70
510-515 70
505-510 80
500-505 36
495-500 16
I have not measured my BC227s yet, but based on a few samples I already know that their HFEs will be lower. I am going on travel for a week. BC227 measurements to come in 10 days or so. Thanks to all for this project!
Pierre
In case anybody is interested, I just finished measuring my BC337s. These are Fairchild devices purchased on ammo tape from Mouser Canada in late November. Part number 512-BC33740TA. For compatibility with others, I used the circuit shown in Post #72. It is very easy to build with a breadboard. I used small pliers to move the transistors (not to warm them up). A fan blows air on the transistors to be tested, the breadboard and transistor under test, and my pliers, to make sure the temperature stays constant. Within at the most a few seconds, the HFE measurement is rock solid.
Results:
HFE #
550+ 14
545-550 14
540-545 45
535-540 36
530-535 14
525-530 27
520-525 37
515-520 70
510-515 70
505-510 80
500-505 36
495-500 16
I have not measured my BC227s yet, but based on a few samples I already know that their HFEs will be lower. I am going on travel for a week. BC227 measurements to come in 10 days or so. Thanks to all for this project!
Pierre
Last edited:
guys,
i cant hardly read the handwriting of hesener on this matching curcuit. should it be a 10k resistor next to the 78L05 on the right side?
www.diyaudio.com/forums/analogue-source/218625-paradise-builders-2.html#post3214907
thanks!
i cant hardly read the handwriting of hesener on this matching curcuit. should it be a 10k resistor next to the 78L05 on the right side?
www.diyaudio.com/forums/analogue-source/218625-paradise-builders-2.html#post3214907
thanks!
installation
hi guys,
got 3 more questions in my head i hope you can help me with - i`m not that confident about those things
1) the Paradise R3 assambly guide shows a pic of the installeion on the last page - it looks like there are XLR connectors besides the RCA IN/OUT - is that right?
i thought the R3 does not deliver a balanced output - is this only an unbalanced XLR taken from the RCA output?
2) Input impedance selector - what is the best choice? thought about a rotary switch with 2 Pole/Deck x 6 Positions?? other suggenstions?
3) Load impedace resistors - i thought 10R, 47R, 100R, 249R, 475R, 1000R would be a good choice. am i missing something?
thank you guys for your support!
regards,
michael
hi guys,
got 3 more questions in my head i hope you can help me with - i`m not that confident about those things
1) the Paradise R3 assambly guide shows a pic of the installeion on the last page - it looks like there are XLR connectors besides the RCA IN/OUT - is that right?
i thought the R3 does not deliver a balanced output - is this only an unbalanced XLR taken from the RCA output?
2) Input impedance selector - what is the best choice? thought about a rotary switch with 2 Pole/Deck x 6 Positions?? other suggenstions?
3) Load impedace resistors - i thought 10R, 47R, 100R, 249R, 475R, 1000R would be a good choice. am i missing something?
thank you guys for your support!
regards,
michael
Output is not balanced
I don't have picture in front of me but maybe XLR for supply?
As long as done properly (no noise) there are many ways to pluck the duck
Dip switches to close and put in parallel the components is another way
Many more combinations available with less components and less steps on switch is one of the advantages.
OR if you have a prefered value a second set of phono plugs with components soldered inside
I don't have picture in front of me but maybe XLR for supply?
As long as done properly (no noise) there are many ways to pluck the duck
Dip switches to close and put in parallel the components is another way
Many more combinations available with less components and less steps on switch is one of the advantages.
OR if you have a prefered value a second set of phono plugs with components soldered inside
