zen #9 WIP

[gionag]

Now our Italian friend is but 2* 0R5 3W resistors short.....any takers?

Magura

I can fix the 0R5/3W. Send me an e-mail.

Johnny

thanks for proposal but now is just arrived a delayed shipment from digikey with 5 of mox 0.47 3W. this resistor is not yet needed.

 

[Magura]

In that case you're all set for the weekend

Magura

 

[Magura]

BTW, your IRF610 without mounting hole is no problem, just make a bracket of a coin with a hole

Magura

 

[yggdrasil]

Good luck with your build.

 

[gionag]

thank you !

today i've finished the pcb for BoZ.

tomorrow i'll start to put on some components.

stay tuned !

 

[gionag]

"In the beggining was BoZ"

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

There aren't so much components on it, but i solder only the components that i already had at home.

Today i made an order from digikey with the rest of components.

And a little question: if I get a longer cable between IRFP240 pins and PCB can i affect performances ?

 

[Magura]

And a little question: if I get a longer cable between IRFP240 pins and PCB can i affect performances ?

No, the wires can be very long, without causing any problems.


Magura

 

[gionag]

OK... perfect

but now i have another problem:

today i test the PSU board for BOZ.

i supply that with a 220V - 60V trasformer.

after the bridge and the C1 (filter cap) i have 86V.. and that's OK ! but, at the output of the psu i have only 48V... instead of 60V.

i checked the connections and they seems ok.

Attached you found the PCB that i used. anyone has idea ??

i never understand the polarity of the zeners. how i have to mount on this pcb ? i put them with stripe on the BASE pin of the TIP29. And also, i used the TIP29CFS instead the TIP29CGE, there are differences ?

 

[Magura]

You're 1 zener short, that is, if you use 9.1v zeners.


Magura

 

[gionag]

i use a 10v zener...

i think that i've inverted the pins on the TIP29.

 

[Magura]

Read the original article, the voltage of the zener string needs to be higher than the output voltage.

Not that it makes up for turning the active device

Magura

 

[gionag]

wait a second...

on the article (brideofzen.pdf) i saw only 6x 10V zener.

if i look at the pcb, i noticed that i've inverted the pins of the tip...

 

[Magura]

wait a second...

on the article (brideofzen.pdf) i saw only 6x 10V zener.

if i look at the pcb, i noticed that i've inverted the pins of the tip...

Fact remains that you need to stack zeners for 4 volts more than the output voltage in this type of regulator


Magura

 

[gionag]

the problem with the psu of Boz is fixed....

at the end the problem was the inverted pins of the tip29. i don't print the pcb "MIRRORED"....

i'm a n00b

 

[sandstorm33]

qionaq-Your Power JFETS are on there way..sent yesterday. 5-10 days according to our local Postal "experts".

Let me know when they arrive....

 

[gionag]

i don't miss !
thanks a lot

 

[gionag]

BOZ TEST FINISHED!

Hi guys,
today i've tested (thanks to the Magura's Resistors) the Bride of Zen.

this is a photo of TEST-SETUP (my desk is so crowded).

An externally hosted image should be here but it was not working when we last tested it.

I've listened trough earphones and HE sounds embarassing well...
The input / output cap is a shitty things. how is the best in this kind of application ?


But now, i've at least one doubt, it's important to match the IRFs ? For what bias current ?

Thanks to anyone who are supporting me.

 

[gionag]

... i've a problem...

what's the reason that i can't reach trough P1 the half voltage of D3 drain ?

when i'm going lowering voltage, at around 32-35 volt che 2ohms resistors became very hot.

what could goes wrong ?