Well, I think I fkd up!!

kimbo5150 · Post by **kimbo5150** » Thu Mar 02, 2006 8:43 am

Hi All,

Yep, the title says it all and as the time draws on I feel even more certain I may have bungled up big time.

In my quest for more headroom, I had the bright idea to try solid state rectification for more B+ voltage. I came across some info on how to DIY your own solid state rectifier plug - from a dude that builds amps - and decided to try it out.
To cut a long story short, the .5 amp fuse on the chassis blew upon flipping the standby switch after i fitted this DIY plug. I reverted back to the tube rectifier - bang went the fuse again.

OK, please help me shed some light on this. I have put a link to the page with the instructions on the plug. scroll down and you will come across them.
After re-reading the post, I see the plug is for reissue JTM45's so I think I have stuffed something up in my amp!

Please help!

Kimbo

http://www.guitargear.net.au/discussion ... ic=1458.30

kimbo5150 · Post by **kimbo5150** » Fri Mar 03, 2006 10:28 pm

Problem solved.

One of the KT66's crapped out from the higher plate voltage!

I'm still curious to know if that rectifier plug will suit the Metro JTM45's.
I will try to investigate it a bit more.

Kimbo

BashCoder · Post by **BashCoder** » Fri Mar 03, 2006 11:36 pm

Glad you figured that out, and that it wasn't too catastrophic!

kimbo5150 · Post by **kimbo5150** » Sat Mar 04, 2006 4:00 am

Thanks Bashcoder!

Yeah, i crapped my pants when it happened. Next time, I'm going to investigate before I panic and start posting 'end of the world' type posts!!!

Kimbo

neikeel · Post by **neikeel** » Sat Mar 04, 2006 6:43 am

No don't do that it is much more fun and it reminds everyone else to be careful with certain mods.

I am happy to help others to learn from my mistakes and vice versa

kimbo5150 · Post by **kimbo5150** » Mon Mar 06, 2006 8:11 am

Thanks Neil,

I have found that the solid state rectifier plug is fine - it brought my plate voltages up to 450 volts. My mistake was to not lower the bias before applying power to the tubes - result ? poof went a tube. - Lesson learnt!

Thanks All

Kimbo