Ceriatone JCM800 techy question

[dstroud]

so I know on the JCM800's there were several 2203 versions from Marshall and the number of caps seems to have had a big impact on the sound. I seem to recall 6 big blue caps being the magic number. Does that Ceriatone JCM800 have the right # of caps for the better sounding ones? Seems like it has less than 6.

 

[Bad.Seed]

The ceriatone has 5 of the 50/50 500v caps standing up through the chassis and one on the board for a total of 6

 

[scottosan]

The ceriatone has 5 of the 50/50 500v caps standing up through the chassis and one on the board for a total of 6

I believe Ceriatone may be missing a dropping resistor on the B+ rail as well

 

[fusedbrain]

As far as I can recall, it's not necessarily the number of caps that affect the sound of those 800's so much as other changes that Marshall made when they did the switch from 6 to 3 caps. I think the B+ went down.
The effective filtering values are the same at all the nodes, but with the switch to 3 caps, you lost the safety factor of running 2x 500volt cans in series on both the plates and screens, so it was important for Marshall to make sure the B+ NEVER exceeded 500v when only running the 3 cap setup.

The Ceriatone stuff is fine, but it makes for a better amp to get the Ceriatone parts sans the iron ( cheaper too ) and load it up with ClassicTone iron.
And yeah, check your layout to make sure you have droppers between all the power supply nodes.

 

[Bad.Seed]

As far as I can recall, it's not necessarily the number of caps that affect the sound of those 800's so much as other changes that Marshall made when they did the switch from 6 to 3 caps. I think the B+ went down.
The effective filtering values are the same at all the nodes, but with the switch to 3 caps, you lost the safety factor of running 2x 500volt cans in series on both the plates and screens, so it was important for Marshall to make sure the B+ NEVER exceeded 500v when only running the 3 cap setup.

The Ceriatone stuff is fine, but it makes for a better amp to get the Ceriatone parts sans the iron ( cheaper too ) and load it up with ClassicTone iron.
And yeah, check your layout to make sure you have droppers between all the power supply nodes.

Have you actually compared the Ceriatone offerings with 2 different transformers?

 

[FourT6and2]

As far as I can recall, it's not necessarily the number of caps that affect the sound of those 800's so much as other changes that Marshall made when they did the switch from 6 to 3 caps. I think the B+ went down.
The effective filtering values are the same at all the nodes, but with the switch to 3 caps, you lost the safety factor of running 2x 500volt cans in series on both the plates and screens, so it was important for Marshall to make sure the B+ NEVER exceeded 500v when only running the 3 cap setup.

The Ceriatone stuff is fine, but it makes for a better amp to get the Ceriatone parts sans the iron ( cheaper too ) and load it up with ClassicTone iron.
And yeah, check your layout to make sure you have droppers between all the power supply nodes.

Have you actually compared the Ceriatone offerings with 2 different transformers?

I have.

 

[FourT6and2]

The ceriatone has 5 of the 50/50 500v caps standing up through the chassis and one on the board for a total of 6

I believe Ceriatone may be missing a dropping resistor on the B+ rail as well

The dropper isn't missing on all of their 800 models. Just the Yeti and Chupa, etc. the straight up JCM800 clones have it as far as I know.

 

[Racerxrated]

As far as I can recall, it's not necessarily the number of caps that affect the sound of those 800's so much as other changes that Marshall made when they did the switch from 6 to 3 caps. I think the B+ went down.
The effective filtering values are the same at all the nodes, but with the switch to 3 caps, you lost the safety factor of running 2x 500volt cans in series on both the plates and screens, so it was important for Marshall to make sure the B+ NEVER exceeded 500v when only running the 3 cap setup.

The Ceriatone stuff is fine, but it makes for a better amp to get the Ceriatone parts sans the iron ( cheaper too ) and load it up with ClassicTone iron.
And yeah, check your layout to make sure you have droppers between all the power supply nodes.

Have you actually compared the Ceriatone offerings with 2 different transformers?

I have out of necessity..since the Ceriatone OT shit the bed the day after a gig. I should feel lucky I made it through Saturday night. This was a Fortin Cali mod JCM 800 clone. Once the OT AND PT were replaced(not taking another chance that the other Trans would fail) I noticed a nice tonal improvement. Those classic tones are nice transformers no matter what you are comparing to. I wouldn't hesitate to buy one if my 82 2204 had a trans problem.

 

[skullfxr]

While I have no problem with classic tones, I have a strong tendency to go heyboer. Mojo uses Heyboer