MusicMan Power Topology..........worth it?

[ToneMerc]

I've been kicking around the idea of doing a MM power section for awhile now, most likely a 100 watter.

Some of the more discrete information surrounding the MM Dumbles is rather limited, but awhile back Tony gave me a some good insight on how to proceed which was a big help. I can obtain transformers that will work and the additional support parts are very small, with the cost difference being no more than maybe $115 or so over a traditional power section.

So the questions of the day are, is there enough tangible sonic difference of the MM supply over a traditional PS and which circuit topologies would be more favorable to a MM supply?

TM

[greiswig]

Bump

[David Root]

It's on my list too, but not in the immediate future. I recall, I think it was Bob-I (could be wrong) said it has "midrange you can stick your head into" which intrigued me. This would likely be a 100W-based comment I think!

I do have a 700V plate project on my current list, however it's a 300W SSS using a NOS Fender 300 PS OT and an Antek 4T500 toroidal PT with a second PT for the preamp tubes and the screen supply.

[Bob-I]

It's on my list too, but not in the immediate future. I recall, I think it was Bob-I (could be wrong) said it has "midrange you can stick your head into" which intrigued me. This would likely be a 100W-based comment I think!

Maybe Brandon, not me, but I played Brandon's amp and I'll agree with that statement.

I do have a 700V plate project on my current list, however it's a 300W SSS using a NOS Fender 300 PS OT and an Antek 4T500 toroidal PT with a second PT for the preamp tubes and the screen supply.

That's a project that could end a career fast "WHAT... SPEAK UP"

I have a similar project in the planning stages, a Peavey Mace, 6 - 6L6's although it's only at 490V place and 475 screen. The damn thing works too, came with 2 blown EVM12Ls. I reconed one myself, just waiting on the time to do the second.

I
d love to hear more about you SSS plans, could be really cool amps, especally in the bars where your constantly told to turn down, wait till the owner walks away, then deafen him with the biggest clewanist guitar tone in history

[Structo]

So what are the advantages of using the MM iron?

I know that it is much higher plate voltage but what is the advantage of that?
More clean headroom?

[talbany]

The main differences I hear are the throaty midrange.. The 700v also magnify s such qualities as touch sensitivity/ sustain when pushed (output section)..The low end seems to be a little hairy-er and not quite as stiff.. (This could just be my tube choice) and a bit more headroom (Though not as much as you think)..The MM iron has a kind of unique bark/snarl to it that appeals to me..The standard iron has these qualities but the MM just shoves them a little closer to your face.. I can't say for certain if players here would consider it a worthwhile upgrade (Taste and value in money and all) I can say I doubt seriously after you get it built you would be saying man that was a waste..Good Luck!!

Tony

I have a similar project in the planning stages, a Peavey Mace, 6 - 6L6's although it's only at 490V place and 475 screen. The damn thing works too, came with 2 blown EVM12Ls. I reconed one myself, just waiting on the time to do the second.

Bob.. How did the re cones go on the EV's have a couple here am looking to do and wondering if it's worth it..any advice.. Thanks

[Bob-I]

Bob.. How did the re cones go on the EV's have a couple here am looking to do and wondering if it's worth it..any advice.. Thanks

I've only reconed one so far, but it went just fine. It's about a 30 minute job and the instructions are very good. The new cone isn't quite broken in yet but so far it sounds really good.

[BobW]

I have a similar project in the planning stages, a Peavey Mace, 6 - 6L6's although it's only at 490V place and 475 screen. The damn thing works too, came with 2 blown EVM12Ls. I reconed one myself, just waiting on the time to do the second.

Bob.. How did the re cones go on the EV's have a couple here am looking to do and wondering if it's worth it..any advice.. Thanks

Thanks Bob, the kits do take the guess work out of determining coil depth.

[talbany]

Bob.. How did the re cones go on the EV's have a couple here am looking to do and wondering if it's worth it..any advice.. Thanks

I've only reconed one so far, but it went just fine. It's about a 30 minute job and the instructions are very good. The new cone isn't quite broken in yet but so far it sounds really good.

Bob
Thanks.. Got a link for the kits.. I think I'll give it a shot..

Tony

[BobW]

Bob, Tony, this link?

http://www.mwaspeakerparts.com/

[talbany]

Bob, Tony, this link?

http://www.mwaspeakerparts.com/

Bob.. Thanks!!

T

[Bob-I]

Bob, Tony, this link?

http://www.mwaspeakerparts.com/

No, this one

http://reconekits.com/electrovoiceevm12lreconekit.aspx

[David Root]

I know Mojotone sells the Music Man 120W iron, and I think they are Heyboer product.

Any other sources?

[ToneMerc]

I know Mojotone sells the Music Man 120W iron, and I think they are Heyboer product.

Any other sources?

It is Heyboer; I contacted Heyboer about making me a MM PT with Twin footprint, in the email chain I received a reply back from a salesperson at Mojo with an off the shelf model that they stock. Initially, I had worked up my own PT design, but then I got to thinking why reinvent the wheel. I will have Heyboer make a OT tranny though.

Mercury sells the 130W OT I believe, but I don't think they sell the type 2 130W PT. I never verified it with them though, I may check just for grins.

TM

[ToneMerc]

The MM iron has a kind of unique bark/snarl to it that appeals to me.

Tony, any idea what attributes this with the MM iron?

Inductance, steel type, lamination types, core size, etc.........

TM