I have already upgraded c46, lots of resistors for reliability, and modded the board to prevent bias drift. I have this thing apart at the moment to fix the blown out screw holes at the power tube sockets and to install a choke. Any other must do mods to improve/change sound? The amp isnt overly bright, and would actually like to make the crunch channel have more treble, but dont know how to yet. I have no probs reading schematics but this one is a buggar.
TSL 100 mods
- Thread starter Parkerx02
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tschrama
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IMHO the gyrator based depth funtion is tuned way to low on the TSL. Replace it for a classic depth pot. On my website there is a slight voicing mod for the gain channel of a TSL60.
I would love to have a pot instead of just the button. Does your website show how to do the depth function mod too?
jumper R90 1nF
jumper R92 470K
clip out C84 (470p)
jumper R83 1Meg
Works for the 100 also? Different component numbers I know
jumper R90 1nF
jumper R92 470K
clip out C84 (470p)
jumper R83 1Meg
Works for the 100 also? Different component numbers I know
South Park
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Look at the tone caps on the crunch Chanel tubes
Vesperado
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Simple fix. Raise one leg on C24 Mainboard. Affects all channels. See if that works for you. Once you have done that you can do the same with C9 Lead and C5 Crunch, having disconnected C24 mainboard FIRST to see whether you need to touch the drive channels.
FYI I kept C5 connected on my Crunch channel, I also like the treble as is on that channel. Once you have played enough on that amp you will be pulling back the treble to save your ears. Having left C5 as is I still have the treble well below noon on that channel.
FYI I kept C5 connected on my Crunch channel, I also like the treble as is on that channel. Once you have played enough on that amp you will be pulling back the treble to save your ears. Having left C5 as is I still have the treble well below noon on that channel.
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GIBSON67
Well-Known Member
Following this thread...
https://atomiumamps.tumblr.com/post/9124750245/current-complete-mods-to-europa-marshall-tsl-100
one I'm interested in:
one I'm interested in:
moreso swapping to the 100k, to see if that makes it more along the lines of the classic tone. I don't necessarily want it to toggle...
Just wanted to point out that C24 only gets switched in on the CH1 Clean via TR2. I always wondered if it was a mistake and they meant to use a 1uF or so. But they were probably wanting to add some top end sheen to the Clean channel.
There are many ways to go about that one. CH2/3 are basically the same topology and voicing but for a few minor differences.
The main ones are the gain pot values and the inter-stage attenuator/peaker just before the gain pots. The schem shows the Crunch channel peaker as "NOT FITTED", but I thought one of my TSL's might have had that?? I think I did tweak that area on one of my TSL 100's.
Both channels use all gain stages, where the DSL Crunch channel omits the 2nd stage V1B (V1AA on schem). On the TSL, CH2 Crunch does not use V1B cathode bypass cap C13 1uF, but then that caps gets switched in on the Red CH3.
What you can also do is piggiback a capacitor of 0.68 or 1uf, across resistor R15 it will give more treble more gain a little more bass in the crunch channel, this change will give you more bass in the channel3, because this capacitor will be in parallel with C13 but not so much because the coupling capacitor of 0.002 uf will filter alot of bass.
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