Seeking suggestions to modify Ceriatone HRM Bluesmaster 50

[rock_mumbles]

The 68k on the mid ground lug is for the PAB level the PAB relay disconnects the mid pot from ground for the "preamp boost" ... the 68k resistor is there to set the level of the boost ...

I modeled the tone stack in Duncan's tone stack calculator ... the mid dip is at a higher frequency than a fender ... changing the 47k slope resistor to a 100k shifts the mid dip to a lower frequency and also tilts the response toward more highs and less lows ...

[roknroll]

As ToneMerc said, building was the easy part. Tuning is the time consuming part. In the past when I first started becoming intrigued by the Dumble sound my first build sounded so bad it was not tolerable. It took months of reading, experimenting, sourcing parts, soldering, desoldering, listening and combing thru TAG and other sources , purchasing speakers, mounting the speakers, dismounting the speakers, listening again, sell them on ebay, buy more speakers, cabinets, all inorder to acquire a personal knowledge base that would allow me to finally dial in what made me happy. I have gone as far as being so pissed of at a build that it goes on a shelf for months at a time and then finally I come back to it again.

I don't know why people get all bent out of shape because they can only get a good tone when the bass is on 1 or the treble is on 9 or whatever. For me, wherever along the rotation of the pot the magic happens, I am just happy to have found it whether it is on 1,2,3,4,5,6,7,8,9 or 0.

One of the simplest non technical tweeks you can make is having the right cabinet and most importantly the right speaker. Of course there is no correct combination that makes everybody happy, so make yourself happy starting by trying other peoples recommendations for cabinets and speakers and go from there. While it is a non technical tweek it is an expensive time consuming tweek.

So I hate to rain on your parade but take it from someone who has been there and done that (not with a Ceriatone), until you have put in the time to find what makes the amp do what u want it to you will be frustrated. There is no one cure all. It is usually a number of things. There is no replacement for time put in, experimentation, research.

I don't think this is what u wanted to hear or read, but for me and I am sure many others involved in this pursuit, it is reality.
Good Luck

[talbany]

I've had about a dozen or so Ceriatone HRM amps that have crossed my bench.. The 1 thing I notice is they all sound very different amp to amp so it's a tough circuit as far as consistency goes and from what I am hearing doubt that Ceriatone or the builders bother to measure each component to be sure they don't have a duck lurking in the circuit and in critical spots..Ceriatone wasn't kidding when the say fully unsupported, as they give no good build guide and even bother to list the proper operating voltages (they all come here for that info)..They should at the very least provide a safety start up check list and service section in there manuals..It's basically here are the untested parts..Good Luck!

Tony

[M Fowler]

I got a Ceriatone voltage chart but uploading has gone mad on me!

[M Fowler]

Try one more time.