Too much voltage from my power supply.

For any general discussions, if your posts topic matches one of the other forums do not post it in here, use the correct forum for the topic.
Dead Key
Dead Key
Posts: 44
Joined: Sunday 19th Oct 2008, 14:36
Location: San Francisco CA U.S.A

Too much voltage from my power supply.

Postby thundir » Monday 23rd Mar 2009, 8:00

Hi Again,
My friend has a power supply made by Pyramid Gold Series. Model Number is PS-8K. Output voltage is supposed to be at 13.8 volts. The problem is that its reading about 23.5 Volts :banghead: . We changed the the 2N3055 silicon NPN power transistor. No Difference. The circuit board inside is small about the size of a cigarette pack. Is there anything else that controls the voltage :?: ? There is a variable pod inside but it doesnt do anything. Thanks Guys...........................

User avatar
Dead Key
Dead Key
Posts: 29
Joined: Saturday 18th Mar 2006, 21:15
Location: Ohio

Re: Too much voltage from my power supply.

Postby Pioneer621 » Friday 24th Apr 2009, 19:55


Check ZD1, it is a 12 volt zener diode, it sounds like it may be open circuit. I hope the schematic for the PS-8K is the same as the PS-8KX as I am going off of the 8KX version, it should be the same board though.

Return to “CB Radio General”

Who is online

Users browsing this forum: No registered users and 3 guests