TSL100 problem

Tommy · 09-21-2009, 08:41 AM

Can anyone help diagnose a TSL 100 problem? The head went back to the factory around a year ago and had the valves and a PCB replaced, it worked ok for a while then went back again. Now it is being strange.... The clean channel is fine but both overdrive channels are suffering from a loss of gain and low end oomph, and the sustain decays very quickly and unpleasantly. I have tried new pre-amp valves.

Any suggestion greatfully received. Thanks,
Tommy

barryg · 10-03-2009, 01:22 AM

What was wrong with your amp the first time you sent it out, and did the amp have this problem when it came back from Marshall ? There's alot going on in this amp, but going by your post, I would reseat all the tubes (power tubes also). Try tapping on each tube with the amp on to see if makes any difference. You may have to open the amp and check all the connections, socket joints, etc. as you may have a bad connection or solder joint somewhere, which I've seen happen due to rough shipping. Check the channel switch connections and relays also. If you don't have experience with the deadly high voltage here, you'll have to send it out again. Hope this helps....barryg

Gtrman58 · 10-03-2009, 07:14 AM

Not a tech here, but 90 percent of the problems I've ever had with tube amps were....the tubes. A cheap & simple place to start.

Bob

Jesstaa · 10-03-2009, 08:23 AM

Quote:

Originally Posted by Gtrman58

Not a tech here, but 90 percent of the problems I've ever had with tube amps were....the tubes. A cheap & simple place to start.

Bob

I agree, but TS seems to also agree

Quote:

Originally Posted by Tommy

I have tried new pre-amp valves.

09-21-2009, 08:41 AM	#1 (permalink)
Tommy Junior Member Join Date: Sep 2009 Posts: 1	TSL100 problem Can anyone help diagnose a TSL 100 problem? The head went back to the factory around a year ago and had the valves and a PCB replaced, it worked ok for a while then went back again. Now it is being strange.... The clean channel is fine but both overdrive channels are suffering from a loss of gain and low end oomph, and the sustain decays very quickly and unpleasantly. I have tried new pre-amp valves. Any suggestion greatfully received. Thanks, Tommy

10-03-2009, 01:22 AM	#2 (permalink)
barryg Junior Member Join Date: Sep 2009 Posts: 15	Re: TSL100 problem What was wrong with your amp the first time you sent it out, and did the amp have this problem when it came back from Marshall ? There's alot going on in this amp, but going by your post, I would reseat all the tubes (power tubes also). Try tapping on each tube with the amp on to see if makes any difference. You may have to open the amp and check all the connections, socket joints, etc. as you may have a bad connection or solder joint somewhere, which I've seen happen due to rough shipping. Check the channel switch connections and relays also. If you don't have experience with the deadly high voltage here, you'll have to send it out again. Hope this helps....barryg

10-03-2009, 07:14 AM	#3 (permalink)
Gtrman58 Senior Member Join Date: Sep 2009 Location: St. Louis, Mo. Posts: 191	Re: TSL100 problem Not a tech here, but 90 percent of the problems I've ever had with tube amps were....the tubes. A cheap & simple place to start. Bob __________________ 2009 JCM 2000 Dsl 100 JCM 900 LEAD 1960A MLB MC412A 1951 Fender Deluxe 2006 Hot Rod Deluxe 1995 Blues Junior 1995 Blues Deville Vox Path Finder 1982 Legend A 30 1980 Gibson Herritage Cherry Sunburst L.P. Standard 1980 Explorer White with gold HW 2000 52 Telecaster USA RI 1983 57 Strat LH USA RI 2003 57 Strat USA RI 1960 Silvertone Danelectro 1994 Fender P-bass 68 RI Acoustic guitars....not enough space to list !!!!!

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