robomatique

Zeners on G9
« on: August 19, 2004, 08:37:25 AM »
Hello,

I am not sure if it matters what kind of zeners I use for the G9. I have a few marked BZX39 39V 1.3W at home, I guess they would be ok, but I just want to be sure?
"Trying is the first step towards failure."
-H. Simpson


gyraf

Zeners on G9
« Reply #1 on: August 19, 2004, 08:42:35 AM »
anything higher than 400mW works fine..
..note to self: don't let Harman run your company..

tony dB

can i put zenerdiodes in series?
« Reply #2 on: December 28, 2004, 12:10:01 PM »
Having no luck in finding Z56 i wonder if i can put 2 zeners, with different values, in series?

I assume their values will add but would like some confirmation from my guruz overhere.

If this works; I need to get to 56 but can get only to 55 with 2 other types available at my shop, will i run into problems?
I think the Z56 is used for the 48V but i'm not to sure either?  :oops:

Thanks for helping out,  :sam:  :guinness:

Tony

tony dB

Zeners on G9
« Reply #3 on: December 29, 2004, 05:24:13 AM »
bump,

wanted to keep this in the same meta so i have ad my question to this topic instead of starting another, help  :grin:

Tony

gyraf

Re: can i put zenerdiodes in series?
« Reply #4 on: December 30, 2004, 07:09:04 AM »
Quote from: "tony dB"
Having no luck in finding Z56 i wonder if i can put 2 zeners, with different values, in series? I assume their values will add but would like some confirmation from my guruz overhere.


Yes - no problem
Quote from: "tony dB"
 
If this works; I need to get to 56 but can get only to 55 with 2 other types available at my shop, will i run into problems?
I think the Z56 is used for the 48V but i'm not to sure either?


55V zener voltage is alright here - you use the trimmer to set exact 48V anyway..

Jakob E.
..note to self: don't let Harman run your company..

tony dB

Zeners on G9
« Reply #5 on: December 30, 2004, 07:39:22 AM »
Thank you Jakob  :sam:

EEMO1

how much is off?
« Reply #6 on: January 05, 2005, 10:45:13 AM »
how much is off for the zd56? like 35 is too little, but is 68 way too much?

 how do you solder 2 zeners in series?

 thanks,

 e

ChrioN

Zeners on G9
« Reply #7 on: April 18, 2006, 01:48:19 PM »
I will use this over one year old thread to ask a related question. Is a 51v or  60v zener ok?
"All PCB traces are curved to emulate the electrical response of point-to-point wiring" -Drip

ChrioN

Zeners on G9
« Reply #8 on: April 29, 2006, 05:35:37 AM »
bumpage. Im onhold right now, would like an answer to the above question  :oops:
"All PCB traces are curved to emulate the electrical response of point-to-point wiring" -Drip

gyraf

Zeners on G9
« Reply #9 on: April 29, 2006, 06:55:57 AM »
60V is probably alright. That is, if your "raw" phantom voltage is higher than this. 51V will probably be too low to get you all the way up to 48V after the pass transistor.

The other option is to use two zeners (that adds up to 56V) in series.

Jakob E.
..note to self: don't let Harman run your company..


 

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