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Lets get Technical > All Things Tube All about preamp and power amp Tubes.

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Author Topic: NAD 90s Carvin Tube 100  (Read 269 times)

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Systematic Chaos

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Re: NAD 90s Carvin Tube 100
« Reply #15 on: Time Format »

Okay,
   the 2:90 is basically two 6L6 power amps side by side, correct?
Yeah, it's 2 MkIV power sections running in SimulClass continuously. You can swap the Class A pair of 6L6 on each side for a pair (quad since you gotta do both sides) of EL34s.
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Fractal AxeFX II, Carvin Tube 100, Roland FC200
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Harley Hexxe

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Re: NAD 90s Carvin Tube 100
« Reply #16 on: Time Format »

Oh, I get it now. You don't have a choice between class AB and class A like you do in the 2:95.
    I'd have to audition a 2:95 to hear the difference. They might get one in at the local music shop down the street from me. I'll bring a preamp when they do and check it out.
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MarshallJMP

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Re: NAD 90s Carvin Tube 100
« Reply #17 on: Time Format »


Thanks for that quick reply...I´ll give it a go once I've checked how it sounds with the EL34. Re-checking the schematic I couldn't find an Input 12AX7, just 2 PIs, correct?!

Looks that way but I think this is not the complete schematic. But it could be like this just 2 PI.
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rnolan

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Re: NAD 90s Carvin Tube 100
« Reply #18 on: Time Format »

In the newer TS100s (like I have) they have both buffer 12AX7s and Phase Inverters (PIs), also a switch to change the circuit (in whatever way is required  :dunno: ) for each channel to go from EL34s to 6L6s and also biasing instructions (have a quick look at the manual), so if you get to modifying it, it would (no doubt) be a good reference as it's obviously a later revision of the one you have.  The TS100 is a great amp, works really well with the MP-2 and split cabs, it's just a brick  :facepalm: , but then no where near as heavy as some of the older tube amps. Compared to a B200s, it's super clean and transparent (as is the B200s) I found it adds a tiny bit of tube warmth to the sound and heaps of good tube grunt  >:D .  I don't use the presence knobs at all, I have all the presence I want/need in the MP2 and also the MP2 room eq sorts out the rest for various stages (dead through live reflections). For those who want to chase power tube distortion (which I don't), you could change the PIs to 12 AT7s. I bought the TS100 because my B200s was farting and I needed an amp, I still prefer the B200s (and being a tube nerd  :facepalm: ...).  In my current live rig I have the Carvin DCM200L, one RU, super lite, and also a great option.
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