Tube Amp Archive

Mike,
Do you want actual Mesa Boogie Graphic EQ measurements?
If so, I can give you them, because I own a Boogie 50 Caliber+.
It is in pieces in my workshop (I bought it from a client who didn't want to pay for the complete rebuild needed) and I can measure up whatever you need.

Noel

Mike,
Maybe you could collaborate with Amp Garage member "frusciante89" (Andrea Antonello), who supplies great PCBs and is now designing a Mesa Boogie PCB.

God Speed HAD and thanks for all the great designs and inspiration. God Bless You. I am a late comer to Dumble amps, having finally realised 10 years ago that all those wonderful amp sounds, I have heard for decades, were coming from H. A. Dumble. I then fell down the "Dumble Rabbit Hole" also, usin...

Hi Franco, That sounds good; very Jazz oriented Clean. We are more into the sounds of OD & Distortion, but we also love having a good Clean sound. I think this 102 amp will be very good for the owner, sound wise and the Boogie cab and parts will provide a suitable platform on which to build it. We w...

Hi NGW, I am attaching some photos of an amplifier that I made for a friend who plays jazz. He was in love with the shape of the Mesa Boogie amp and found a well-sized wood cabinet with a sienna speaker cover. The choice for the music that he plays went to a JM / Wonderland clone on a chassis bough...

RG, Thank you for another informative post. Is is OK with you, if I use or quote your explanation, to help answer my clients questions? It is so difficult sometimes, to explain the need for diagnostic testing, to avoid the debate about what various guitarists will think is the answer, due to their s...

Thanks rootz, I was thinking of building two amps, so we can compare low plate and high plate. He mostly uses his Les Pauls or SG, but he also uses a nice Strat. He likes the smooth OD of a Zendrive and also likes to add more OD as well, like the Boogie. We may keep the Boogie Graphic EQ after the O...

Hi all, Last year I posted about finding a PCB/Cct board for a Mesa/Boogie 50 Caliber+. https://tubeamparchive.com/viewtopic.php?f=6&t=33523 I had no luck finding anything and was going to build the owner a new replica amp on eyelet board, but he said he would wait until he decided on what he wanted...

If I use ceramics I use the C0G/NPO version for reasons explained in the following link https://www.allaboutcircuits.com/technical-articles/x7r-x5r-c0g...-a-concise-guide-to-ceramic-capacitor-types/ Lately I've been using WIMA FKP2 1000V(Polypropylene film caps) for caps in the 33-100pF range 5mm l...

Anyone have any comments on using ceramic caps for snubbers, instead of film/foil/mica caps?
I don’t have dog ears and I can’t hear any difference.

pdf64 wrote: ↑Tue Apr 06, 2021 7:38 am I’m a fan of LCR polystyrene for sub 1nF axial caps.

I use a lot of the LCR polystyrene caps also and I like them, but I would prefer something cheaper for snubbers, which is why I posted this topic.

I finally got back to this after a few days of very bad internet access, thanks to my service provider. by mhuss » Sat Apr 03, 2021 4:45 am I think the OP question was concerning if the type of capacitor made a difference (not the pros and cons of adding anti-fizz caps)? I think small caps are very ...

Stevem, insulated wire makes more sense. I dont think a bare wire, attached to HT (and wrapped around the low voltage grid, where you don't expect to find HT), would be a good idea and not something I would do anyway. pdf64, thanks for the interest and comments. The discussion is moving into the des...

Stevem,
I haven't had any adverse problems with my high gain amp work, related to treble reducing caps but, that is an interesting idea to try.
So you use bare wire and only insulate the end? Should the wire be wrapped tight?
My scope is my friend.

Just wondering what types of caps you blokes use for treble bleed/fizz/ice pick reduction in high gain amps and where you prefer to fit them? I want to try some different types, from the film caps I have been using, to hear what, if any, tone differences there are. Also, do you hear much difference ...