But seriously (note how seamlessly we segue into the begging ) I have been lurking here and staying up all night reading and comparing for some time, and I'm afraid if I don't build a D-clone I may forget how to sleep altogether. The only ones I know of hearing are the ODS model, and that is a sound that I like.
Thing is, I don't have an old Bassman to sacrifice, but I do have a few good trannies (no MMs, but Hammonds and the Russian version of Marshall 50watt... New Sensor?) to place upon the altar, and boxes of other good stuff. One possibility that has entered my mind is a Bassman PT and a new Hammond 1645 OT. The 30ish watts output would suit me fine as I have no further aspirations to play in baseball stadia.
I need some advice from those who have successfully cloned one, but I find little info on transformers and that's kind of hanging me up. I mean, I know the feeling of standing at the edge of a minefield. Actually, I would love and cherish any info or suggestions that don't include actual human sacrifice. I mean, it doesn't hurt to ask- but...
Thanks,
Dave
Last edited by titanicslim on Wed Aug 02, 2006 12:09 am, edited 1 time in total.
Dave, you can use the Marshall, be aware that if it is an OT (you didn't say) it will dictate if you use EL34s or 6L6s (do you know how to discern what tubes an OT is designed for?)
What Hammond do you have? If it is a power transformer made for a 50 watt amp you're all set.
Is any of this what you were looking for?
Thing is, I don't have an old Bassman to sacrifice, but I do have a few good trannies (no MMs, but Hammonds and the Russian version of Marshall 50watt... New Sensor?) to place upon the altar, and boxes of other good stuff. One possibility that has entered my mind is a Bassman PT and a new Hammond 1645 OT. The 30ish watts output would suit me fine as I have no further aspirations to play in baseball stadia.
I need some advice from those who have successfully cloned one, but I find little info on transformers and that's kind of hanging me up.
Yeah, I am just looking to start building and am feeling a little unsure. Just want to check myself. The Marshall OT iron is for el34s. JCM or JMP, as I understand. I was gonna build one of them but after I've heard the clips here... well, truth be told, after my lead man heard them He is sure he can't live much longer without one.
I'm the bass man/bandleader and I've been force-feeding him Robben Ford. It's only what I deserve, I guess.
I've also got a Hammond 272JX PT, sec. are 300-0-300, 250 mA; 5 V, 4 A; 6.3 V, 8 A, according to the catalogue. The Hammond OT I've got is a 1645, which I think is rated for 30watts RMS. I've seen it used with about every type of tube there is.
titanicslim wrote:I've also got a Hammond 272JX PT, sec. are 300-0-300, 250 mA; 5 V, 4 A; 6.3 V, 8 A, according to the catalogue. The Hammond OT I've got is a 1645, which I think is rated for 30watts RMS. I've seen it used with about every type of tube there is.
I think you'll be fine with the Hammonds. You may have to tweak a few values to get voltages where they need to be, but you'd most likely have to do that anyway. The 272JX is a great all-purpose PT. I used one in my Trainwreck and it runs much cooler than my Bassman PT. I haven't tried the 1645, but I've used the 1650G with good results. Actually, with the 5k primaries it's not all that far off from the Bassman if you use the 4 Ohm tap. (Bassman is 4K primary but I believe Dumble typically used 100W 2K iron even for 50W amps.)
If it's any consolation, I'm building a 20 watt 6V6 ODS using Trainwreck iron.
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I've also got a Hammond 272JX PT, sec. are 300-0-300, 250 mA; 5 V, 4 A; 6.3 V, 8 A, according to the catalogue. The Hammond OT I've got is a 1645, which I think is rated for 30watts RMS. I've seen it used with about every type of tube there is.
Norm you cut me too the quick on this one, Iwas getting ready to say "Express" when I saw those tranny numbers!
Norm- what a beautiful schemo! Consolation or not, I'll sure be thinking about it, thank you not very much. I'll print that on heavy stock and frame it, man.
What kind of iron are we talking about? Is that something that's made specifically for the TW, or could you rig it like any amp of those general specs? Or do you mean the Hammond? 20 watts is about perfect for the venues we infest.. Hmmmm.....
As for the build I was talking about (with possibly the 1645) the Marshall PT I mentioned puts out serious voltage. I'd have to look at the spec sheet, but it just seems like a great candidate for an overdrive amp. I'll have to study the proposition.
HAHAA I got a feeling that I am going to cut you to the quick on the Liverpool Got the boards and chassis but still need iron from Moose! The Rocket will have to wait, until it is better documented.
FWIW-I built the Trainwreck Express first. Too me it was a very easy build with all the pics (francesca) and layouts. Having said that, don't let the simplicity fool you it is a KILLER amp. Got a great clean too. Did I say it has a great clean?
My ODS amp was done before Gil's photos were uploaded, so I layed it out based on the pics available, but you have two great amps that are totally documented. Plus an abundance of great people here who will help you along the way. I am waiting to see who will clone this amp (124) first and mabye here some clips.
I personally wasn't planning on building another amp but my cabinet maker (neighbor) built me two trainwreck cabs, so I would leave him alone for a while. He didn't know that I built the ODS while he was making those cabs
Mabey I''ll luck out and he will make me two cabs again. LOL!
I work from home and yes, I have two much time onm my hands!
I built the Trainwreck Express first. Too me it was a very easy build with all the pics (francesca) and layouts. Having said that, don't let the simplicity fool you it is a KILLER amp. Got a great clean too. Did I say it has a great clean?
My ODS amp was done before Gil's photos were uploaded, so I layed it out based on the pics available, but you have two great amps that are totally documented. Plus an abundance of great people here who will help you along the way. I am waiting to see who will clone this amp (124) first and mabye here some clips.
If you would be so kind, it would interest me greatly to make sure I know what you are talking about, what I mean to say is- shoot it to me... If you would be so kind
And really, I think clean is so overrated, don't you? But then, there is acoustic amplification, and I am all but convinced that a good, bright dynamic all-tube circuit, hooked up to the proper sensing apparatus has got to be the way to go.
I don't know how many of us (probably an awful lot) know where the big research dollars are going in the infernal quest for the perfect acoustic ampl. system? Right, digital.
I won't get started on my hobby horse but to say that the player's expenditure on amps funds that research. "Where's my high quality amp cover?" I ask the Music Store Dude. "It's just nipped over t'the market to squeeze some microchips, Matey, and here's the web address of your fancy "care-and-feeding" manual.
That's it,
Dave
The denunciation of the young is a necessary part of the hygiene of older people, and greatly assists in the circulation of the blood. - Logan Pearsall Smith (1865 - 1946)
If you would be so kind, it would interest me greatly to make sure I know what you are talking about, what I mean to say is- shoot it to me... If you would be so kind
All the files are on the board. Do a search and you will find just what you need.
And really, I think clean is so overrated, don't you?
Uhh No, can your clean bloom into harmonics?
I won't get started on my hobby horse but to say that the player's expenditure on amps funds that research. "Where's my high quality amp cover?" I ask the Music Store Dude. "It's just nipped over t'the market to squeeze some microchips, Matey, and here's the web address of your fancy "care-and-feeding" manual.
OK, I guess I wasn't very clear in my previous messages. I don't have a bunch of money to buy specialized transformers, and need to know if what I have (a New Sensor Marshall 50watt OT, choke and PT; and a couple of Hammond trannies- the 272jx PTand the 1645 OT- are suitable for any specific models. I'm looking at the Hybrid A. This schemo assumes the standard Bassman iron, right? Can anyone see any potential problems with either of these combinations?
And, while I'm on the subject, there are so many T Wreck versions, do you need UL trans for those? There seem to be differences in those and between the Dumble variations as well.
Thanks,
Dave
The denunciation of the young is a necessary part of the hygiene of older people, and greatly assists in the circulation of the blood. - Logan Pearsall Smith (1865 - 1946)
titanicslim wrote:OK, I guess I wasn't very clear in my previous messages. I don't have a bunch of money to buy specialized transformers, and need to know if what I have (a New Sensor Marshall 50watt OT, choke and PT; and a couple of Hammond trannies- the 272jx PTand the 1645 OT- are suitable for any specific models. I'm looking at the Hybrid A. This schemo assumes the standard Bassman iron, right? Can anyone see any potential problems with either of these combinations?
Your Marshall 50 watt iron will work fine. I built 6 "D" amps with that same set of iron and they are all sound great. I don't have a clue as far as Hammond iron, I have never used it for any project.
You could build a 4x 6V6 amp or 2x6L6 (EL34) amp with that set up and should have no problems. Of course you would be limited to JJ 6V6's as they are the only ones that I know of that will take the additional high voltage thhat will be supplied by the Marshall transformer.
Gary
Located in the St Croix River Valley- Afton, MN
About 5 miles south of I-94
aka K0GWA, K0 Glas Werks Amplification www.glaswerks.com
) I have been lurking here and staying up all night reading and comparing for some time, and I'm afraid if I don't build a D-clone I may forget how to sleep altogether. The only ones I know of hearing are the ODS model, and that is a sound that I like.
He is sure he can't live much longer without one.
Got the boards and chassis but still need iron from Moose! The Rocket will have to wait, until it is better documented.
but my cabinet maker (neighbor) built me two trainwreck cabs, so I would leave him alone for a while. He didn't know that I built the ODS while he was making those cabs 
