Fuse blew in my N999ES Modwright PS 9.0 power supply

0 Members and 1 Guest are viewing this topic. Read 2005 times.

Whitese

Can someone lead me to the correct value for that fuse? the one that blew reads type P239 E.3A/250V. It has the thick filament with a wraparound coil...I cannot find any that matches it at Radio Shaq.  Is it fast or slow blow? (it seems slow blow by the element). 

JakeJ

Re: Fuse blew in my N999ES Modwright PS 9.0 power supply
« Reply #1 on: 29 Apr 2012, 04:02 pm »
Whitese,

Here is a link to the Littlefuse data sheet http://www.littelfuse.com/data/en/Data_Sheets/239.pdf.

Looks to be a 5 x 20 mm 3 Amp Slow Blow.

I would caution you to not just buy one, throw it in, and turn it on.  It blew for a reason so you should contact ModWright to discuss why and what they recommend you do to continue.

Best of luck,
Jake

modwright

Re: Fuse blew in my N999ES Modwright PS 9.0 power supply
« Reply #2 on: 11 May 2012, 05:33 pm »
If the PS is tube-rectified, it is likely that the rectifier tube is bad.  If so, try a new 5AR4 and a new 3A slo-blow, long-delay type fuse.  If not tube-rectified, or it continues blowing fuses, then please contact us.

Sincerely,

Dan