Dual 500 issue...

[kingman]

I know there was a thread related to the 500 turning on by itself independent of the switch but can't find it? Can anyone direct me? Also looking to replace the large caps. . Suggestions? Thanks!

 

[NavLinear]

Several threads to read.


http://forums.phxaudiotape.com/show...ual-500-quot-rising-from-the-ashes-quot-build

http://forums.phxaudiotape.com/showthread.php/7722-Another-d-500-rep

http://forums.phxaudiotape.com/showthread.php/7773-WOPL-dual-500

 

[NavLinear]

What size caps are in the 500?

 

[grapplesaw]

I know there was a thread related to the 500 turning on by itself independent of the switch but can't find it? Can anyone direct me? Also looking to replace the large caps. . Suggestions? Thanks!

The power caps are 12,000uf 120 volt 3” by 5.5”

if you want a nice upgrade Apex jr has some 33,000uf which I am using. Need to upgrade the bridge rectifier as well

the 500 uses a relay to turn on or off. The power switch runs through the front panel and powers on the relay circuit. There is a small transformer behind the meter panel to operate that system

power on and offf are controlled by transistors that may need replacing. A power outage ( external or internal) may activate the circuit and be your problem. A simple fix is a power strip with switch

please read the service manual as it describes this better and possible repairing it . The problem is in the meter board or power supply for it, no othe way to turn on or off than there

 

[grapplesaw]

Here is service manual info

if power switch is broken somehow it could also be the problem.

 

[grapplesaw]

What size caps are in the 500?

These Caps your sell would work well

 

[kingman]

Thanks! I'll play around with it after the holidays. Right now just listening to a few tunes on it.

 

[oldphaser]

Wayne,

You may have a problem with a MPSA42 on the meter drive board. You may also want to check the capacitors as well.

Ed