the Poor Man 660 support thread

[Knarleybass]

well, still making slow progress on my PM660, turns out the LM337 is getting so hot it's shutting down, could there be something wrong or do I need a larger heat sink?

 

[Moby]

Excuse me Moby,
I'm talkin about MPS92....... =Q1
is impossible to have 300V there !!!!
SO form trafo i have 270Volt AC in .
Then after D1-2-3-4 i will find near 370 and then at base of Q1 i will have near 370.

Whats wrong Huh

Noting wrong, voltage depends on mains transformer U use. Ok, you have 370V unregulated, than the base of Q1 will have 368V, emitter something like 369V and you forget that collector is not grounded but biased at 254V. So "wrong" is that Q1 never "see" ground , just difference between base and collector. No need for measuring it's clear by analyzing the schematics  
Edit:
If you don't measure something close to 254V on collector of Q1 than you have to check D7(100V) it's probably shorted. Same with Q2,Q3, expect on the junction something close to 230V

 

[Moby]

well, still making slow progress on my PM660, turns out the LM337 is getting so hot it's shutting down, could there be something wrong or do I need a larger heat sink?

Somethin' is wrong for sure, check did you reversed something.

 

[Knarleybass]

everything seems right, nothing reversed, at least everything follows the silkscreen on the PCB, it's Vexing...

 

[AW_music]

Hi, REPORTAGE FROM THE FRONT LINE !!!
Great progress with the BEast !!! ;D
Finally Getting ready with the PSU!
There were a couple of resistors with wrong values!!! ....AZZ.....
So with board attached now i have :
245V ,  137V,    5,8V Heater
Finally It seems OK !

NOW
I tried to set the trimmers but the value goes from -0,2 to -0,78 !!!!
I cannot set them to -4,5 and -2,4

What should i have check ???
regards

 

[Moby]

Hi, REPORTAGE FROM THE FRONT LINE !!!
Great progress with the BEast !!! ;D
Finally Getting ready with the PSU!
There were a couple of resistors with wrong values!!! ....AZZ.....
So with board attached now i have :
245V ,  137V,     5,8V Heater
Finally It seems OK !

NOW
I tried to set the trimmers but the value goes from -0,2 to -0,78 !!!!
I cannot set them to -4,5 and -2,4

What should i have check ???
regards

Great news  Check the -17V regulator, if you are talking about voltages on RV6

 

[Moby]

everything seems right, nothing reversed, at least everything follows the silkscreen on the PCB, it's Vexing...

Yes, it's vexing but that's the part of DIY 

 

[AW_music]

OK, GOOD NEWs
Finally sorted OUT!!!

There were others wrong resistors on boards........SUPER AZZ..... stupid errors i know.....  :'(
So if you have strange voltages on you PM , Check 10 times your resistors
AND
never do "DIY" thinking about your girlfriend !   : : : ;D
Now the PM670 FINALLLY is ALIVE!!!
Soon I will post some photos.

Thanks to  Silent.art, analag, moby, and mata_haze for help and support !!! NEVER GIVEUP!   NO WAY!

The meters react very slowly....... is this the way they are supposed to work ????

Regards

 

[skal1]

need some help on the meter light connection and bypass boards ,


can they both run of the 17 v rail

Do i connect the light and relay boards in parallel with the 17 v rail


skal1

 

[[silent:arts]]

another one alive - cool  8) 8) 8)
great you sorted it out.
I always measure any resistor before soldering in, just to go sure ...  

The meters react very slowly....... in this the way they are supposed to work ????

this depends very much on the ballistic of the meter you used.

we want pics ;D ;D ;D

 

[[silent:arts]]

need some help on the meter light connection and bypass boards ,
can they both run of the 17 v rail
Do i connect the light and relay boards in parallel with the 17 v rail

if your meter light doesn't need too much current no problem.
and yes, parallel.

 

[skal1]

cheers Mr Art



skal1

 

[Moby]

Thanks to  Silent.art, analag, moby, and mata_haze for help and support !!! NEVER GIVEUP!  NO WAY!

U welcome, cheers! 

 

[mata_haze]

Thanks to  Silent.art, analag, moby, and mata_haze for help and support !!! NEVER GIVEUP!  NO WAY!

U welcome, cheers! 

ROCK AND ROLL!
Mattia.

 

[AW_music]

Here we are, with the BEAST !! ;D ;D ;D
Long battle.....
but you know..
...in the end...
only the STRONG survive !!!!!!

Thanks to ANALAG and SILENT ART and this great forum for the Help !
I'm wondering where i can put LOLO's pcb ???

 

[lolo-m]

I'm wondering where i can put LOLO's pcb ???

Yes with this box it's pretty tight  ;D

But I see two options :
- Verticaly ( TO 220 fixed on the bottom of the box ) behind the transformers and the front plate
- Upside down, on the top of the box, TO220 fixed on the right side , upon the PSU board.
TO220 fixed INSULATED any way you choose
I hope it helps 

It make me think I should finish my front plate  ;D...

 

[[silent:arts]]

brilliant color mix  ;D ;D ;D
nice work 
added to the porn list 

 

[Knarleybass]

well,
  turns out the -17v supply is working properly, at least when it's not connected to the PM660 PCB, when it's connected the LM337 gets so hot it shuts down.

 

[Moby]

well,
  turns out the -17v supply is working properly, at least when it's not connected to the PM660 PCB, when it's connected the LM337 gets so hot it shuts down.

Than check the components on PM660. Must be that something is shorting. Did you tried to adjust the RV6? Is the resistance of the RV6 not less than 2k5?

 

[Knarleybass]

turns out I am having a grounding issue with the 660 board,