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Offline jhjhTopic starter
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« on: October 06, 2018, 03:06:32 pm »
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hi guys ,,i have resistors get hot i don't why ,,i change the transistor new and still get hot.. i change the transistor 2n3773 and transistor MPSA14.still hot i don't know whyyyy
THE RESISTOR 47 OHM
ANY ONE please can help

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« Last Edit: October 06, 2018, 09:12:24 pm by Homefire »
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« Reply #1 on: October 06, 2018, 09:16:10 pm »
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  No one could respond to this post because you had it LOCKED.  LOL   DO NOT LOCK the post if you like company. 

Posted on: October 06, 2018, 09:14:04 pm
Post the associated Schematic with said resistors / transistors marked.    That way we have a chance of figuring this out, eaaa?

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« Reply #2 on: October 07, 2018, 02:11:27 am »
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sorry,, how fix the  LOCKED

the resistor beside ,,transistor MPSA14

47 OHM

THANK YOU

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« Reply #3 on: October 07, 2018, 08:25:44 am »
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look at the circal



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« Reply #4 on: October 07, 2018, 10:26:06 am »
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   Start by verifying the value and resistance of the 100 Ohm Resistor.  

Lift lift leg of same and measure current flow.

I figure it should show like .08 Amps.   Why they want that No Clue.   You could put a 1K resistor in that position and it would still work lowering that value.

 Those MPS 14  toast most easy.  Check to see if it's toasted yet again.


***    All the schematics I have on this are rubbish quality.  Do you have better ?

Can't read most of what I have.



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« Last Edit: October 07, 2018, 10:36:13 am by Homefire »
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« Reply #5 on: October 07, 2018, 11:07:24 am »
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Quote:Posted by Homefire
  Start by verifying the value and resistance of the 100 Ohm Resistor.  


.......i remove the 100ohm resistor still hot.....

Lift lift leg of same and measure current flow.

I figure it should show like .08 Amps.   Why they want that No Clue.   You could put a 1K resistor in that position and it would still work lowering that value.

,,,i will tray put 1kohm..


 Those MPS 14  toast most easy.  Check to see if it's toasted yet again.

,,,,i put new mpsa14 ,,,only the resistor 47ohm get hot.....

***    All the schematics I have on this are rubbish quality.  Do you have better ?

Can't read most of what I have.




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« Reply #6 on: October 07, 2018, 03:53:49 pm »
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   Check the MPSA 14 again.  They cook easy. 

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« Reply #7 on: October 08, 2018, 11:56:03 am »
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hi thank you for help ....

i put 1k resistor,,no get hot but the transistor  MPS 14  get toast



you right ,,the, MPSA 14 .. cook easy. i Change 3 times



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« Reply #8 on: October 08, 2018, 01:06:03 pm »
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LOL, Yep !  Garret used them in all of they're detectors Audio Output.  Any time I had issues with one that is what the problem was.  TOASTED MPSA 13 or 14.

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