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    My TSL 601 Combo died. Need help

    according to my schematic the 6.3 amp fuse is the heater supply feed for the valve filaments. the ac through the fuse feeds the heater for the output valves and valve 4 as heater fil1 fil2 the fil1 fil2 then feeds the bridge rectifier br1 rectified to dc and named as fila filb and fed as the...
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    cooking toast on the power tubes...

    yes i think i sorted it it looks like measured from a different point cheers
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    cooking toast on the power tubes...

    a wee bit confused downloaded your schematic and one from schematic heaven and they are drawn differently but on the schematic heaven one Marshall clearly sets bias voltage at -48 volts and not -40 volts this may help or hinder the situation any suggestions cheers
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    V8280 Problem.

    you probably have shorted mosfets (outputs) solid state can be tricky to work with you will need a current limiter (bulb) and a variac and a meter. the problem with solid state is when you have a fault such as this you do not know how much damage is caused and sometimes you have to shotgun...
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    Blew a fuse.

    yes, you are right, forgot to say but (took for granted) that he would know if it holds means - on power up if the fuse does not blow did not want to complicate the matter by bringing up the dc bridge rectifier but i think we are saying the same here cheers
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    Blew a fuse.

    thrawn86 6.3 amps is a lot of amps i would remove the new power tubes before i replaced the fuse in case there is a heater in one of the new power tubes shorting. if it holds then replace the new tubes hope this helps
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    Do we need a disclaimer on the Workbench?

    jon got to clarify this three prong earth thing (you prob know this but just in case) there is two types of shock in the amp 1 direct contact 2 indirect contact direct contact occurs when you connect yourself across live and neutral you take the full current till the nearest fuse upstream...
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    Do we need a disclaimer on the Workbench?

    a disclaimer wont do any harm but wont stop this shit. the poster starts a thread how i safely use a 2 prong amp till i change to a three prong. in the music electronic forum in the last fortnight then writes his own disclaimer. fair enough his credentials - 2 advanced engineering...
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    "how to" on building a chassis stand for repairs

    brilliant i am going to make one but it wont look as good as this, wordwork is not my strong point you say it is 5 inches longer modified spec ? cost? any other lessons to pass on cheers
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    "how to" on building a chassis stand for repairs

    a set of plans are on trinityamps.com site register / login/forums/ the want adds show a kit made up- this kit is sold out but the resources part of the forum has the plans about 15 pages to download hope this helps
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    1966 Plexi For Sale

    been reported as fraud this is the second time this amp has come up on gumtree in the last couple of months with the same plexi shit description
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    Mojo needed for Wilder.

    speedy recovery jon and welcome back
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    Mojo needed for Wilder.

    hope all goes well jon best wishes from london
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    Marshall TSL 100 head turns on but tubes don't fire up

    i think its fixed sorry i didnt respond earlier me and martystrat54 had a seperate date and couldnt respond right away but glad its fixed cheers
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    Haze 40 combo

    good post argus tuft regarding upgrade kit-00021 that would imply that there are upgrade kits 1 to 20 for other marshall upgrades/mods it would be fantastic if you could start a new thread giving us some info on these if you have it cheers
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    Marshall TSL 100 head turns on but tubes don't fire up

    pulling the power tubes was only to eliminate the possibility of a power tube pulling the heater line down without taking the associated fuse. you will get no sound until your heaters are working. the receive loop only tests the output section which will not function until the heaters are on...
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    Marshall TSL 100 head turns on but tubes don't fire up

    yes but noticed it before and just put it down to a misprint cheers
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    Marshall TSL 100 head turns on but tubes don't fire up

    excellent but thought el34 heaters 2 and 7 (6.3v yes) i was thinking of the ecc83 twin triode feed (12v dc ie rectified)in this case been a long day cheers
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    Marshall TSL 100 head turns on but tubes don't fire up

    ok get the schems from schematic heaven or drtube download a data sheet for el34 to familiarise yourself with the pins layout i am assuming that the primary of the transformer has power and that the main fuse is ok basically the ac heater voltage to the pins of 2 and 7 (4*el34) comes from the...
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    Marshall TSL 100 head turns on but tubes don't fire up

    ok take out the 4 power valves and switch on tha amp. does the preamp valves light. if so one or more of your power tubes has shorted try that first

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