Mark ll C+ help / information

[Buster Leggs]

I have an HX head (60/100, no reverb) that I bought a few months back. It' one of my best sounding pluses so I never changed any of the tubes, leaving well enough alone. I just noticed that it only has 3 pre-amp tubes + the PI, no V4 per say
,. I'm no expert but I thought only the 60 waters had that pre-amp tube set up. This is the only one I have with no reverb but my understanding has been that reverb shares half of one of the 4 pre-amp tubes in a 60/100 watt C+. Can someone please tell me that this is the way this amp is supposed to be or is something funky going on here. Thank you in advance for your reply.

 

[JOEY B.]

For a non-reverb amp, that is the correct tube layout. 8)

 

[Buster Leggs]

Thanks for the reply Joey, good to know I didn't buy a freak. How dose that work, What are V1 -V3 assigned to. THANKS

 

[JOEY B.]

Look at the tube task chart in the manual. http://www.mesaboogie.com/manuals/Mark%20II-C%20Manual%20-%20Maintenance%20&%20Repair.pdf

Remove the reverb from V3 and V4, then combine the Lead Drive into the two triodes of V3. Quite simple, don't you think?

 

[Buster Leggs]

Thanks Joey, I like the fact that the lead drive amp is on 1 tube instead of half on 2 tubes. Even though it sounds good already I'm curious what a NOS would sound like in V3. Thanks again for your help.

 

[JOEY B.]

Late 1960's RFT ECC83 12AX7 works well. http://www.tubemonger.com/12AX7_ECC83_ECC803S_E83CC_7025_CV4004_CV492_CV4035_M8137_s/6.htm?searching=Y&sort=9&cat=6&show=10&page=1&search=%20RFT

 

[Buster Leggs]

Thanks, I just got 2 of those in a trade, I traded him 2- 5751 5 star triple micas. I haven't taken the RFT's out of the box yet but I will now . He got the RFT's from tubemonger but then decided he wanted to tame his MK lll a little. The 5751's brought him closer to what he's lookin for. I'll check the rft in v3 Tuesday when I practice, that's the only time I can turn it up to really tell. When I crank it at home I risk going to jail (I've been warned by the men with the shiny black shoes).

 

[JOEY B.]

My C+ amps have Tungsram ECC83/12AX7 in V1 and V2 with the RFT for the lead/reverb duties. My favorite combination for years now.

 

[Buster Leggs]

J B. - Mike told me the tungrams were stock in the factory pluses. What is the best source for those? Thanks

 

[JOEY B.]

J B. - Mike told me the tungrams were stock in the factory pluses. What is the best source for those? Thanks

Tubemonger has a few left, and there are some on eBay.

 

[dodger916]

J B. - Mike told me the tungrams were stock in the factory pluses. What is the best source for those? Thanks

Tubemonger has a few left, and there are some on eBay.

Picked up another. Thanks for the tip (again) Joey..

 

[igfraso]

I picked up a matched pair for V1 and V2. Thank you, Joey!

I have a 60/100W with the X101 (plus GEQ and Rev). What tubes do you suggest to make the amp a little smoother?

Best regards and thanks in advance.

 

[JOEY B.]

I picked up a matched pair for V1 and V2. Thank you, Joey!

I have a 60/100W with the X101 (plus GEQ and Rev). What tubes do you suggest to make the amp a little smoother?

Best regards and thanks in advance.

I would try the preamp tube cocktail that has been discussed in this thread. For power tubes in a 60/100, the STR-415 or Winged =C= are hard to beat. To smooth out the feel of a 60/100, use it in 100 watt mode with an 8-ohm speaker cab hooked to the 4-ohm speaker jack of the amp. 8)

 

[Buster Leggs]

I picked up a matched pair for V1 and V2. Thank you, Joey!

I have a 60/100W with the X101 (plus GEQ and Rev). What tubes do you suggest to make the amp a little smoother?

Best regards and thanks in advance.

I would try the preamp tube cocktail that has been discussed in this thread. For power tubes in a 60/100, the STR-415 or Winged =C= are hard to beat. To smooth out the feel of a 60/100, use it in 100 watt mode with an 8-ohm speaker cab hooked to the 4-ohm speaker jack of the amp. 8)

Thanks for all the tips Joey. **** I better get on those tubes right now.

 

[JOEY B.]

Thanks for all the tips Joey. **** I better get on those tubes right now.

Dammit, what the HELL have I done? Now I'm going to have to check my NOS tube stash, before all the Tungsrams are gone! :shock:

 

[igfraso]

I would try the preamp tube cocktail that has been discussed in this thread. For power tubes in a 60/100, the STR-415 or Winged =C= are hard to beat. To smooth out the feel of a 60/100, use it in 100 watt mode with an 8-ohm speaker cab hooked to the 4-ohm speaker jack of the amp. 8)

Preamp cocktail is already purchased and, probably, on its way tomorrow (Tungsram in V1 and V2; RFT in V3 and V4; and GT12AX7M in V5).
Power tubes are STR-415 and speakers are MS-12 in the combo and EVM-12L in the Thiele.

I have been using the Simulclass emulation as suggested by Mike B. but wanted to see what else I could do to make the 60/100 a little less aggressive.

Thank you very much Joey! I appreciate your time and advice.
Best regards

 

[Buster Leggs]

I would try the preamp tube cocktail that has been discussed in this thread. For power tubes in a 60/100, the STR-415 or Winged =C= are hard to beat. To smooth out the feel of a 60/100, use it in 100 watt mode with an 8-ohm speaker cab hooked to the 4-ohm speaker jack of the amp. 8)

Preamp cocktail is already purchased and, probably, on its way tomorrow (Tungsram in V1 and V2; RFT in V3 and V4; and GT12AX7M in V5).
Power tubes are STR-415 and speakers are MS-12 in the combo and EVM-12L in the Thiele.

I have been using the Simulclass emulation as suggested by Mike B. but wanted to see what else I could do to make the 60/100 a little less aggressive.

Thank you very much Joey! I appreciate your time and advice.
Best regards

Ditto. Bought and paid for but with a cv4024 in PI slot. Joey I really think you should check into some form of a referral commission. T.M. is going to come in tomorrow and realize labor day weekend was very good for sales for some reason. :lol:

 

[JOEY B.]

One of these http://www.thetubestore.com/Tubes/12AX7-ECC83-Tube-Types/JAN-GE-5751 in the phase inverter position might also help tame a 60/100 Boogie.

 

[Buster Leggs]

One of these http://www.thetubestore.com/Tubes/12AX7-ECC83-Tube-Types/JAN-GE-5751 in the phase inverter position might also help tame a 60/100 Boogie.

I bought a batch of those, or at least something very close. Mine are JAN GE 5751 5 star triple mica. Are mine comparable ?

 

[JOEY B.]

One of these http://www.thetubestore.com/Tubes/12AX7-ECC83-Tube-Types/JAN-GE-5751 in the phase inverter position might also help tame a 60/100 Boogie.

I bought a batch of those, or at least something very close. Mine are JAN GE 5751 5 star triple mica. Are mine comparable ?

That is a question much better suited to the tube vendors. I would say yes, but assumption is the 'mother" of all F-up's. :wink: