OT Comparison - 562003 vs. 562004 vs. 100W

[jvk]

All hail simulclass!

I've taken some pics of the Mesa simulclass OTs to look at their sizes and footprints. I've placed them in order of chunkiness and size

                 weight     amps used in
                 ---------  -----------------------------
1. 562003        2.80kg     MarkIV-A   MarkIII  
2. 562004R-1     2.45kg     MarkIV-B   
3. T100-152019   2.40kg     MarkIIB    MarkIIC/C+   MarkIII

The 562003 is the undisputed king, I bet it's pretty much exactly the same size and weight of the IIC+ output transformer. It can handle more power and has more clean headroom. I definetly hear the difference between the 562004 and 562003 at loud volumes. The highs are smoother and more smooth+blurry and the lows are more asskicking. Especially combined with a X101 export tranny 8) The X101 is as large as some 200W power trannys in other makes of amp.

Meet the family

 

[Shep]

Thanks Cool.. i had no idea the mk IV A had a 562003 in it..cool

 

[jvk]

It get's more confusing. Some later MarkIV-A have the 562004R-1. It's the same with the Mark III I believe.

 

[Shep]

i am going to go a check my mkIV for the 562003..i know my blue stripe III has one..

 

[Russ]

Mine is a 562003

 

[jezzbro]

mine is 562004 (MarkIV A made in 1990)

 

[Russ]

Mine is a '90 Mark IVA too.

 

[Shep]

mine is a 92 and its got the 562004 in it..

 

[Elpelotero]

Note:

I once spoke with Mike B. on the phone about these transformers...

562004 is = 562003.....BUT! 562004R is NOT= 562003.

 

[Aart]

My 6/92 has a 562004R-1 OT. So a lot of A's will still have the B OT.

 

[jvk]

Note:

I once spoke with Mike B. on the phone about these transformers...

562004 is = 562003.....BUT! 562004R is NOT= 562003.

That is correct, sir

 

[jvk]

Mine is a 562003.
Mine is a '90 Mark IVA too.

mine is 562004 (MarkIV A made in 1990)

So we can start to assume that the 562003 to 562004 transition started in 1990, until proven wrong.

 

[Russ]

I am thinking that might be a good assumption...

 

[Shep]

wow.. I have the 562004 without anything after it..so that means it's a 562003...there you go..

so if my amp is a 6/92 and its a 562004 and AART's is a 6/92 and it's a 562004 R-OT then i have one of the last 562004's ever made..

 

[Aart]

wow.. I have the 562004 without anything after it..so that means it's a 562003...there you go..

so if my amp is a 6/92 and its a 562004 and AART's is a 6/92 and it's a 562004 R-OT then i have one of the last 562004's ever made..

And I one of the first 562004R-1's! :lol:

 

[jvk]

Woah so many assumptions

 

[pmb]

Which ones did they use for the coliseums (mark III)

 

[Greenevil]

I didn't realize that I have two 562003s!! (thanks to my 295 :wink: since I never use it, why not use it for parts), my question is how do I safely remove them w/o destroying them and can I put one in my 95' Mark IVB (that currently has a 562004R-1) and one in my Mark IIC Coliseum (Mike B. is in the process of modding the head)that is if I can even put them in both amps? Does the 562003 really make that much difference in tone? Stupid question but I want to know if it's really worth switching them out and getting the simul mod for my Mark IIC Coli with an orig 562003. I use my Strategy 400 (not sure what tranny is in the 400) more than the 295 in my studio rig and so I never really A/B'd them... and I use the Triaxis/2:90 combo for live use (gets a lot more use than the studio rig) but thats a whole other beast...

 

[Enlightened]

Hi
Im new to this Forum and need some help.

I have a MKIIc+ with an OT #562004, recently it smoked way passed dead.
Talk to some tech guy and told me that he can make it new again if only I can get him the readings on the taps that go out to the tubes.

Anyway I did order a new OT from Mesa with the #562003 does not hurts since its not as expensive as I tought.

Can someone help me get the readings on that burnt OT.

Thanks

 

[jvk]

jvk I believe for the last one in the list you accidentally cited the 60/100 OT#.
Pretty sure you meant "SC-152019B" vs T100-152019

Hi George,

Long time no speak hope you're doing well.

The thread was titled "OT Comparison - 562003 vs. 562004 vs. 100W" so I guess that's why I included the 100w OT.

Now that I've had all of them at one point or another, I can conclude that all of the Boogie Mark series (and 2:95) simul OTs are electrically identical, even though they are different in their physical footprint. They all dissipate the same power at given frequencies, and have the same impedance.

Thanks,

Jonny