here's a plexi layout and diagram with dual bias pots...

http://www.sonicdeli.com/ThunderTweakWeb/info/TopFuel50dB.pdf

Hope this helps!

Gregg

The PAB sounds different through the Jazz setting, but i think it is more of a perception thing, than there actually being a difference between the PAB on the two settings, much like if you set your tone controls differently, the PAB will sound differently to your ears, because there is a perception of more or less of a difference, if that makes sense. kinda like if you have your mids high to begin with, there will be less of a perception in a difference in the mids when you engage the PAB. Also, as SoundPerf pointed out thre is less gain with the Jazz setting to start with, so that me be why it sounds so different.

very nice! come on UK folks!!

As i may have mentioned on this forum (i can't remember if i have or not) i have an injury to left (fret) arm and some arthritis in my wrist that has been keeping me from playing as much as i like and has kinda slowed me down a bit as far as playing style, in other words, no Yngwie or Satriani type stuff for me right now, and about an hour or so is all i can play and i have to stop, which bites  That, coupled with getting all my muscle memory back after putting the guitar for 5 years(i started playing when i was around 12 and i'm now 35), has kinda gotten me back to me jazzy chord driven roots. That being said, i plugged the Sheraton into the BM today and started playing some Chuck Loeb-ish/ Django Reinhardt-ish/Mitch Holder-ish type stuff (not nearly as good of course) through the Jazz setting, and i gotta say, there is really something to it. It really does make the amp more "hi-fi" as Nik puts it, tightens every thing up nicely and makes an amp that is already quite touch sensitive even MORE so. Due to the flat response and huge power rating of the Eminence speakers i have in there now (basically 20 year old Delta-12A's which are darn close to Delta Pro-12A's which are clones of EV-12L's) i can push the bass all the way up to 10 (yes really!!!) and enjoy the huge sound that the Bluesmaster has to offer without getting muddy. Roll the mids back to around 9 o'clock, the treble to between 4-5 o'clock and holy cow, it's a jazz player's dream! The clean channel can be pushed into either sweet or dirty overdrive by either my boosta grande, PAB, mega PAB, or by turning the gain up and it doesn't get gnarly. So cool. The OD channel seems sweeter with the Jazz setting as well. I have a JanGE 5751 in V2 which gives a nice smooth creamy OD anyway,  and my HRM tonestack is bypassed most of the time, so transition from clean to slightly overdriven jazzy goodness is seamless.

I don't know if it's the speaker change that has allowed me to enjoy the Jazz setting more, or if it the tubes i'm using (i put telefunkens in the V1 and the C-lator and a good balanced Sovtek in V3) or if the amp is aging more or if it's just because i'm playing more jazz scaly/riffy/chordy stuff, but wowsers, i definitely dig the Jazz channel these days and really, really, need to work on getting some recording gear so i can share the tone i'm getting, if not my crappy playing

anyone else digging the jazz setting on their BM or other OTS???

Gregg

Henry,

Any update on the c-lator solution?

as far as the stray cat goes, when i go for it, which will prolly be next year sometime, i was thinking about a head for it.

Thanks!

Gregg

agree 100%

The JJ's ain't bad. They are my 2nd favorite in V2, FWIW

Gregg

sounds pretty close to me!

Like i said on Facebook, don't worry about they haters. We all know you make a great product. The proof is in the pudding, as they say.

I agree with Tone Control on all counts. You can indeed get early Hendrix sounds out of the BM, both Early Marshall and Early Fender sounds, if you so desire. If you are using a strat you will need a fuzz face or a tube screamer or a boost pedal to get that little bit of extra gain out of it, but overall, the BM has good gain on the OD channel. I have the HRM bypassed on mine, but that was more because i hated the "set and forget" nature of teh post OD tonestack. if the controls were external, i may have left it working, but as it is, i like it bypassed as it has a totally different tone and OD characteristic than it does with the HRM circuit engaged, and i like it.

Oh ya I forgot about these. Very nice, have heard nothing but good things about them, and the built in serial/parallel function is nice!

Why would you? If you don't need an extra $250 and you DO need Glasswerks written on your loop buffer.

*****EDITED FOR FORMATTING IT WAS HARD TO IMPORT THIS FROM EXCEL AND IT'S NOT ALIGNED PERFECTLY, BUT YA'LL WILL GET THE IDEA *****    I ALSO ATTACHED THE RESULTS OF ALL SIX AS A PDF FOR EASY READING******

So, since there are no 120 volt HRM Bluesmaster voltage readings on the Ceriatone site, and certainly no NON HRM Bluesmaster readings, so,  i conducted six tests using the various Preamp and Phase Inverter Tubes i typically use. The only ones i have not testes yet are the Telefunkens and JAN GE 5751 tubes, but i will soon and add the results to this post.
Wall Voltage was 119.2 VAC for the duration of the testing. I used TAD 6L6GWC Output tubes. I also took readings using both full HT/B+ voltage and lowered HT/B+ voltage utilizing the Sag resistor which drops the HT voltage, and thus drops the voltage across the whole amp .
I documented both high and low HT voltage, with the Higher voltage on the left side of the / and the low voltage on the right side.
I did not adjust the bias current during all of the testing, nor did i adjust the PI Trimmer. Of particular interest is the PI readings. My amp sounds best with about a 7-8 volt swing between Pins 1 & 6, and as you will see, changing the PI tube can drastically throw the voltage off, so if you are part of the camp that adjusts their PI trimmer, bear in mind that no matter which way you check it, the DC volt swing, using a sine wave and oscilloscope, by ear, etc, bear in mind that if you change the PI tube, you may wanna check and maybe tweak your voltages.
I was going to give a brief tone synopsis of each combo, but i decided to keep it just factual for now, but if anyone has any questions about how they sound, i will answer!!

So without further ado...

***************************Test 1*******************************                        
Bluesmaster 50 Non HRM      120V-119.2 VAC   9/6/11                     
Tube   Type                    Pin 1   Pin 3                      Pin 6        Pin 8   
V1   12AX7 GE Long     169/160      1.5/1.4         182/174      1.3/1.3   
V2   JJ ECC83S         179.4/171.1      1.7/1.6               193.7/184.8           1.6/1.5   
V3   12AX7 GE Long     239/228      39.2/37.5         232/221      39.4/37.6   

                                     Pins 1&8         Pin 3         Pin 4   Pin 5        Pin 6                   
V4   TAD 6L6GWC   36.6mV/27.8mV      445/425   445/426   -40      446/426         
V5   TAD 6L6WGC   35.9mV/27.8mV      445/425   445/425   -40      446/426         
                              
HT   346/339                           
HT   346/339                           
OT CT  447/426   
BIAS TAP 51.8

***************************Test 2******************************

Bluesmaster 50 Non HRM      120V-119.2 VAC   9/6/11                  
Tube   Type            Pin 1                   Pin 3                     Pin 6               Pin 8
V1   JJ ECC83S     172.2/164.5      1.5/1.4         181.3/172.6      1.4/1.3
V2   JJ ECC83S     180.7/172.3      1.7/16         194.4/185.4      1.6/1.5
V3   12AX7 GE Long     239/228      39.2/37.5         232/221           39.4/37.6

                                      Pins 1&8         Pin 3         Pin 4   Pin 5      Pin 6
V4   TAD 6L6GWC   36.6mV/27.8mV      445/425   445/426   -40     446/426      
V5   TAD 6L6WGC   35.9mV/27.8mV      445/425   445/425   -40     446/426      
                           
HT   346/339                        
HT   346/339                        
OT CT  447/426                        
BIAS   TAP 51.8

*************************Test 3************************************
Bluesmaster 50 Non HRM      120V-119.2 VAC   9/6/11                  
Tube   Type                     Pin 1               Pin 3                 Pin 6      Pin8
V1   12AX7 GE Long     170.8/162.8      1.5/1.4         183.9/175.2   1.3/1.3
V2   12AX7 GE Long     179.1/170.6      1.8/1.7         192.2/183.3   1.6/1.5
V3   JJ ECC83S             239/228              40/38         237/226      39/38

                                        Pins 1&8        Pin 3       Pin 4    Pin 5     Pin 6
V4   TAD 6L6GWC   36.6mV/27.8mV      445/425   445/426   -40     446/426      
V5   TAD 6L6WGC   35.9mV/27.8mV      445/425   445/425   -40      446/426      
                           
HT   346/339                        
HT   346/339                        
OT CT  447/426                        
BIAS   TAP 51.8

**************************Test 4************************************
Bluesmaster 50 Non HRM      120V-119.2 VAC   9/6/11                  
Tube   Type                     Pin 1              Pin 3            Pin 6            Pin 8     
V1   12AX7 GE Long     168.8/160.6      1.5/1.4         182.1/173.6   1.3/1.3
V2   12AX7 GE Long     177.7/169.1      1.8/1.7         191.0/181.6   1.6/1.5
V3   Mullard CV4024     185.1/176.8      55.2/52.8         180.2/171.8   55.1/52.6

                                       Pins 1&8        Pin 3        Pin 4    Pin 5    Pin 6
V4   TAD 6L6GWC   36.6mV/27.8mV      445/425   445/426   -40     446/426      
V5   TAD 6L6WGC   35.9mV/27.8mV      445/425   445/425   -40     446/426      
                           
HT   346/339                        
HT   346/339                        
OT CT  447/426
BIAS TAP 51.8
*****************************Test 5******************************
Bluesmaster 50 Non HRM      120V-119.2 VAC   9/6/11                  
Tube   Type                     Pin 1              Pin 3                  Pin 6           Pin 8
V1   GT 12AX7R   177.5/169.3      1.4/1.4         186.4/178.3   1.4/1.3
V2   GT 12AX7R   180.4/172.3      1.8/1.7         195.4/186.5   1.6/1.5
V3   GT 12AX7R   249/238           38.2/36.5           241/230       38.2/36.5

                                       Pins 1&8       Pin 3         Pin 4     Pin 5    Pin 6
V4   TAD 6L6GWC   36.6mV/27.8mV      445/425   445/426   -40     446/426      
V5   TAD 6L6WGC   35.9mV/27.8mV      445/425   445/425   -40     446/426      
                           
HT   346/339                        
HT   346/339                        
OT CT   447/426                        
BIAS   TAP 51.8
*****************************Test 6***********************
Bluesmaster 50 Non HRM      120V-119.2 VAC   9/6/11                  
Tube   Type                     Pin 1              Pin 3                     Pin 6          Pin 8
V1 Sovtek 12AX7WA     175.4/166.5      1.4/1.4         176.5/167.7    1.5/1.4
V2 Sovtek 12AX7WA     174.5/1661      1.8/1.7         188.6/1802   1.7/1.6
V3 Sovtek 12AX7WA      238/227      41.4/39.5         226/215         38.1/36.5     
   

                                     Pins 1&8     Pin 3           Pin 4       Pin 5    Pin 6
V4   TAD 6L6GWC   36.6mV/27.8mV      445/425   445/426   -40     446/426      
V5   TAD 6L6WGC   35.9mV/27.8mV      445/425   445/425   -40     446/426      
                           
HT   346/339                        
HT   346/339                        
OT CT   447/426                        
BIAS   TAP 51.8      

*****EDITED FOR FORMATTING IT WAS HARD TO IMPORT THIS FROM EXCEL AND IT'S NOT ALIGNED PERFECTLY, BUT YA'LL WILL GET THE IDEA *****    I ALSO ATTACHED THE RESULTS OF ALL SIX AS A PDF FOR EASY READING******
               

is there plenty of room for a c-lator in the tall cabs?

Also would you be able to be persuaded to make a cab for a Stray Cat?

Gregg

I agree. Glad you got it fixed. BUT...

The white stuff indicates the tube broke, air got in there, and if it didn't blow when the heater turned on at started warming the cathode and electrons started flying, it certainly did when plates got their juice. Biasing low won't cause that damage, it may make your amp sound like crap, and you may get crossover distortion, in theory, but not blow a tube, in fact it would increase tube life.

Gregg