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Author Topic: Autek QF-1A 12 vdc question  (Read 1384 times)
WA4053SWL
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Posts: 164


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« on: August 27, 2012, 12:26:13 PM »

Hello all,
Could someone tell me where is the negative wire 12 vdc transformer, the manual says in "filter chassis
ground", as indicated by the white arrow the positive go to diode D1.
Thanks for you help Grin Grin

Locate the rectifier diodes, D1 and D2, on the
schematic. These are directly forward of the right
transformer screw (as viewed from the front of the
unit). Connect +12 to +14 VDC to the right side of
either diode (the side with the band on the diode).
Connect the battery ground to the filter chassis
ground. Note: reversal of battery polarity, even for an
instant, will burn out the filter

http://img6.imageshack.us/img6/825/qf1aautek.png
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KB4QAA
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« Reply #1 on: August 27, 2012, 01:13:40 PM »

extreme bottom left of the board.  The black wire with the blue crimp connector is Negative/ground.
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WA4053SWL
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« Reply #2 on: August 27, 2012, 01:36:45 PM »

Ok, thank you very much for answer Grin Grin
73 george
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WA3SKN
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Posts: 5420




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« Reply #3 on: August 28, 2012, 10:38:26 AM »

PS:  It is a transformer... it supplies AC!  The diode determines the DC polarity of the output.
73s.

-Mike.
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WA4053SWL
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« Reply #4 on: August 28, 2012, 06:10:21 PM »

Hi Mike,
The manual says that the positive 12VDC go to the right side of
either diode D1 or D2, the side with the band on the diode, and negative to ground to filter chassis.
Hope to do well Roll Eyes


« Last Edit: August 28, 2012, 06:12:21 PM by WA4053SWL » Logged
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