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NO power out on MAX III

 
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NO power out on MAX III
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RadioMan
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Post NO power out on MAX III Reply with quote
Hi folks. Bought a max 3 about a month or so ago to replace my Max II. I looked for the manual on this site but was unable to find it; everythinig is now Max 3+ and Max 4.

No power out. I can hear it in my place but that's about it.

What should I do to check the condition of the transistor (final output). Should it be "open" between the collecter & base or shorted between the base & emitter(and so on). I felt the componants and nothing got even warm after 5-10 minutes

I have a new 15v power supply running the max 3 and an SE 4+ encoder, and I checked the output of the power supply before going on-line with the gear. It shows 15.23v so I couldn't have fried the final when I powered up (could I?). The SE4+ is working great (I'm using it with the old max II I already have). At the risk of sounding stupid, which is the transistor for the final out? I assume that it is the one near the center of the board.

My entire setup is: 15v power supply, SE4+, Max 3 exciter, 50' RG-8 cable, 1/4 wave ground plane mounted 28'.

If anyone has the max III and had or has a similar problem let me know. And Marko- if you see this let me know where I can find the manual again.

Any ideas-let me know!
Tue Apr 04, 2006 7:11 pm View user's profile Send private message
pcs
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Post Reply with quote
Is this unit controlled via LCD or potentiometer?

Is the error LED turned on or not?

Email me and I'll send you the manual. Should be on the cd as well.

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Marko - PCS Electronics
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fax +386 4 2316 128
Tue Apr 04, 2006 8:00 pm View user's profile Send private message Visit poster's website
RadioMan
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Post Reply with quote
it has the led and a pot on the main board. the led reads "15 watts" , but when I hook it up to a swr i get no reading at all. also the final out (t3) does not get warm at all.
Tue Apr 18, 2006 12:11 am View user's profile Send private message
pcs
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Post Reply with quote
This is the old III model, not the new 3+?

I'm not entirely sure so it'd be best, if you send me a photo via email.

If this is the old model, turn the temp protection trimmer until the error/swr
led goes off. That LED signals that the protection is turning the output stage
off.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Tue Apr 18, 2006 9:46 am View user's profile Send private message Visit poster's website
RadioMan
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Post Reply with quote
sorry, I have no way to email a photo at present. Please explain in more detail about error/protection LED? I have no manual and no disc came with my purchase. If you remember I bought the Max 3, SE4+, and 15v/3amp power supply at the same time.
Tue Apr 18, 2006 7:10 pm View user's profile Send private message
RadioMan
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Post Reply with quote
Which is the temp trimmer?
Tue Apr 18, 2006 7:12 pm View user's profile Send private message
pcs
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Post Reply with quote
I suggest a look at the manual for max pro 3.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Tue Apr 18, 2006 7:32 pm View user's profile Send private message Visit poster's website
RadioMan
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Post Reply with quote
I found the correct trimmer for temp protection. There is a very small window while sweeping from one end to the other that turns the red "error" LED out. Is that normal. Also, after a few hours it shuts down again completly. I have it mounted in a case and a fan blowing across the final.

BTW-Last time I looked for the MAX 3 manual, I couldn't find it on this site.
Wed Apr 19, 2006 5:34 pm View user's profile Send private message
pcs
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Post Reply with quote
Email me directly. You have previous version and the link for that one is gone.

It was supposed to be on the CD as well.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Wed Apr 19, 2006 5:46 pm View user's profile Send private message Visit poster's website
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