LSS 15 & 5w mode problem

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dc3c46
Bottle Rocket
Posts: 2
Joined: Mon Jun 07, 2010 5:01 pm

LSS 15 & 5w mode problem

Post by dc3c46 » Sat Mar 17, 2012 8:58 pm

Hi guys!
Just picked up my Lonestar Special from repair.
Cathode resistor was replaced and power tubes were replaced.
Came home and now it works only on the 30watt setting.
15 and 5 are dead silent. I know I should have tested the amp before
I went home.
Now I am seriously ticked off! Can't the repair dude test the rig
in all configurations?!
Anyone got an idea what the problem now is?
Cheers,
C.J.

thom
Mark II
Posts: 91
Joined: Mon Dec 29, 2008 9:25 am
Location: Leicester, England.

Re: LSS 15 & 5w mode problem

Post by thom » Sun Mar 18, 2012 3:45 am

Yes, most likely the rectifier tube has failed. Seems to happen a lot. There is a mod (use the search function here) to help prevent this happening. The mod should have been applied to later models (serial numbers over 4000 I think). Having said all that my LSS is old, Sn <1000 does not have the mod and has never blown a rectifier tube. I recommend you source an NOS (new old stock) tube as they will be far more robust than a new production tube.

You should probably check that the rectifier tube is seated correctly before you do anything, maybe it just came loose in transit...

Tom

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