Search found 119 matches

by lovetoboogie
Fri Jan 11, 2019 3:01 pm
Forum: Vintage Amps (Before 1991)
Topic: Putting together a Mark III Guide
Replies: 35
Views: 4513

Re: Putting together a Mark III Guide

It's CP1G ©1984
by lovetoboogie
Thu Jan 10, 2019 2:43 pm
Forum: Vintage Amps (Before 1991)
Topic: Putting together a Mark III Guide
Replies: 35
Views: 4513

Re: Putting together a Mark III Guide

I admire your work... I have many Mark III's reaching the bench. Here is a stock Red Stripe Simul (sharpied 4/87) if you need any additional photos , etc...lemme know while I have it open. Came in for a broken EQ assign switch and while I had it open the B+ caps and low voltage rail current resistor...
by lovetoboogie
Fri Dec 21, 2018 12:30 pm
Forum: Mark Series
Topic: Mark III+ blowing fuses
Replies: 16
Views: 2785

Re: Mark III+ blowing fuses

Just to play it safe you would like to see 110-117vac max with a high quality step-down.

Tripp-Lite and Seven Star are good brands in the US for tube gear and other sensitive equip.


https://www.bhphotovideo.com/c/product/ ... _down.html
by lovetoboogie
Thu Dec 20, 2018 10:20 am
Forum: Mark Series
Topic: Mark III+ blowing fuses
Replies: 16
Views: 2785

Re: Mark III+ blowing fuses

You will need to get that AC down...particularly at 50hz. Just not enough iron in the Mark III PT core to handle it as it seems. The heat and the fuse problem are your clue...

You might want to consider getting an export PT in there. Reach out to Mesa and check the cost.
by lovetoboogie
Tue Dec 18, 2018 2:46 pm
Forum: Mark Series
Topic: Mark III+ blowing fuses
Replies: 16
Views: 2785

Re: Mark III+ blowing fuses

Are you using a 3a Slo-Blow fuse? Couple of things... A Mark III power section is super efficient and that power tranny should NOT be getting that hot. I certainly don't mean to discount Mesa's advice or your tech that it's fine. There is a difference between a PT getting hot and one that is too hot...
by lovetoboogie
Fri Dec 14, 2018 11:28 am
Forum: Mark Series
Topic: Mark IIC/C+ and III Power Section 1.5K Resistor Placement
Replies: 10
Views: 2046

Re: Mark IIC/C+ and III Power Section 1.5K Resistor Placemen

That resistor is part of the tuned resonance portion of the global negative feedback loop. Placement either before or after that cap/resistor filter will have a distinct effect. The heart of the C+ and Mark III tightness is the fully realized resonance tuned negative feedback loop. This is sort of ...
by lovetoboogie
Thu Dec 13, 2018 10:52 pm
Forum: Mark Series
Topic: Mark IIC/C+ and III Power Section 1.5K Resistor Placement
Replies: 10
Views: 2046

Re: Mark IIC/C+ and III Power Section 1.5K Resistor Placemen

That resistor is part of the tuned resonance portion of the global negative feedback loop. Placement either before or after that cap/resistor filter will have a distinct effect. The heart of the C+ and Mark III tightness is the fully realized resonance tuned negative feedback loop. This is sort of t...
by lovetoboogie
Mon Dec 10, 2018 8:53 pm
Forum: Mark Series
Topic: Photo request: Mark IIC+ preamp circuit board
Replies: 23
Views: 4849

Re: Photo request: Mark IIC+ preamp circuit board

Don't even think about putting the tantalum caps in. There is no such thing as a tantalum capacitor that sounds good and when they go bad they become hard shorts. Put in electrolytics instead, best of all, non-polarized ones. Mesa uses those awful tants only because they are cheap and they offer a ...
by lovetoboogie
Sat Aug 25, 2018 8:08 am
Forum: Vintage Amps (Before 1991)
Topic: Taking a IIB into modern metal territory?
Replies: 4
Views: 1833

Re: Taking a IIB into modern metal territory?

The Horizon is the new standard for just that super focused squealy gain... You should go old school and check out a ProCo Rat. The ones with the real LM308 chip. The other guitarist in my band uses it with his SOB and its uncanny how detailed and clear it is on the high gain stuff.
by lovetoboogie
Mon Jun 18, 2018 11:18 am
Forum: Vintage Amps (Before 1991)
Topic: 81 Mesa Mark IIB troubleshooting, changed PT, tubes, caps
Replies: 7
Views: 3124

Re: 81 Mesa Mark IIB troubleshooting, changed PT, tubes, cap

...That's why preamp/power amp isolation and testing is absolutely task no. 1 to perform. No sense spending hours tracing a preamp problem when it's the output transformer that's the real issue. Couldn't agree more. Hopefully the original poster is making some headway with this. It's hard to do the...
by lovetoboogie
Sun Jun 17, 2018 11:56 pm
Forum: Vintage Amps (Before 1991)
Topic: 81 Mesa Mark IIB troubleshooting, changed PT, tubes, caps
Replies: 7
Views: 3124

Re: 81 Mesa Mark IIB troubleshooting, changed PT, tubes, cap

See those black devices on both sides of V1? Those should be a TCR 5302 and TCR 5304 current limiting diodes. Replace them with 1.5K resistors. That'll tell you if those diodes are bad, and why those diodes were there to begin with is pretty much anybody's guess. I don't see the point of them, give...
by lovetoboogie
Tue Jun 12, 2018 12:32 pm
Forum: Boogie Classifieds
Topic: 77' Mark I 15", 79' Mark IIA 15" & 79' Mark IIA Head...FS
Replies: 0
Views: 1160

77' Mark I 15", 79' Mark IIA 15" & 79' Mark IIA Head...FS

Hi gang... I have the following Boogies up for grabs... They are ALL stage and/or studio ready and need nothing. Plug and play... I will not ship the 15" models but I can deliver any of these in the greater NYC area for gas and coffee money additional... Figured I would offer them here before eBay a...
by lovetoboogie
Tue Jun 05, 2018 5:37 am
Forum: Mark Series
Topic: Mark IIB Gainy Clean channel Opinions please?
Replies: 11
Views: 3008

Re: Mark IIB Gainy Clean channel Opinions please?

i gave a listen to vid you put on youtube... it does sound a tad grindy for the clean channel. but several things play into that...the pups on your les paul, tone settings, preamp tubes, etc... a good starting point for good Fender-like clean chime on a IIB clean channel is; vol: 6-7 treb: 7-8 bass...
by lovetoboogie
Mon Jun 04, 2018 10:47 pm
Forum: Mark Series
Topic: Mark IIB Gainy Clean channel Opinions please?
Replies: 11
Views: 3008

Re: Mark IIB Gainy Clean channel Opinions please?

i gave a listen to vid you put on youtube... it does sound a tad grindy for the clean channel. but several things play into that...the pups on your les paul, tone settings, preamp tubes, etc... a good starting point for good Fender-like clean chime on a IIB clean channel is; vol: 6-7 treb: 7-8 bass:...
by lovetoboogie
Sun May 06, 2018 8:49 pm
Forum: Mark Series
Topic: Mark IIC+ Reverb switching question
Replies: 3
Views: 1839

Re: Mark IIC+ Reverb switching question

A TS will do...what you have is the reverb circuit where the footswitch control doesn't turn the reverb on and off...it's actually a reverb pad of sorts. It lifts/inserts a series resistor on the reverb recovery tube cathode. This is the bain of all reverb complaints on late IIC+'s and Mark III's as...