Fanpage of the best solid state amp marshall ever made. I recently came to own a marshall mosfet lead 100 head model 3210 that doesnt really work, and im looking for any assistance i can get. It delivers 100 watts of solidstate power at 4 ohms. Marshall diagrams, schematics and service manuals download for free. By varying the value and the polarity of the bias applied to the top electrode of a mos structure one can drive the silicon underneath it into enhancement all the way to inversion. Marshall amplification amplifier user manuals download. Selling for a friendmarshall lead 100 mosfet solid state guitar amp head 1986 black tolex weight25lbs heres a 1986 marshall lead 100 mosfet head, often regarded as and imho the best and most tube sounding solid state marshall head. It includes a marshall 1965a cabinet with 4x10 gl35s and a marshall 1965b cabinet with 4x10 gl35s. The best advice that i can think of is to crossreference the different 100w mosfet schematics one can find on the net and compare them against the circuit, and draw the conclusions from that. When graphed on a loglog scale, the c can be extrapolated linearly to the proper operating voltage. You will require adobe acrobat pdf reader to view these schematics. Possibly the best solid state marshall amplifier ever produced. Marshall jcm800 lead mstvol 100w 2203 schematic marshall jcm800. Marshall lead 100 mosfet model 3210 and 3 gibson les pauls.
The marshall lead 100 mosfet has a solidstate power amplifier with a tube preamp through a 12ax7. Basics of the mosfet the mosfet operation the experiment the mos transistor operating regions of the mosfet themostransistor once the threshold has been crossed, we need to make the electrons move, i. Marshall mosfet lead 100 head manual rockstarfreesoft. Lecture 15 the mosfet university of california, berkeley. I had a college roommate, circa 1987, who had a lead 100 mosfet head and the 4 x 10 slant cab. Tintronics completed the jlead forming of a mosfet transistor, which is used in a highefficiency switching application for a military client. It sounded a bit dark and dingy at first but i recapped it and it came back to life. Amp schematic with the famous hitachi 2sk4 and 2sj49 mosfets, issue 2. Data sheet silicon transistor 2sc3357 npn silicon epitaxial transistor power mini mold description package dimensions the 2sc3357 is an npn silicon epitaxial transistor designed for. This same current flows into the gate of each mosfet in fig. Changes or modifications to this unit not expressly. We fabricated some mosfets satisfying vb,maxlgd 200v. This head is great for dialing in that 80s tone if you like what you see please. Unfollow marshall mosfet lead 100 to stop getting updates on your ebay feed.
I recently picked up a marshall lead 100 mosfet model 3210 made in 1987 and have to say its impressive, especially for being a solid state amp. The epflekv mosfet model equations for simulation 2 mbclceftfk epfldeleg 29. Jlead forming of a mosfet transistor for the military. The sound and overall quality of this amp is, in my opinion, the best. My local music store i do business with currently has one of these priced at 250, and the owner said hed give me a deal for 200 since ive always bought there i told him if i did decide to buy, i would be in tomorrow morning first thing, so my word is on crunch time. User manuals, marshall amplification amplifier operating guides and service manuals. Marshall model 3210 lead 100 mosfet head 1980s reverb. We have recently found that this circuit can be modified as shown in fig. I am honestly surprised no one praises, or seeks this head out as much as they should and it is still relatively unknown.
For this, we need two more terminals source s and drain d, and a potential across them to control the. Metaloxide semiconductor fieldeffect transistor mosfet the metaloxide semiconductor fieldeffect transistor mosfet is actually a fourterminal device. Today we check out my marshall lead 100 mosfet amp head. Marshall 52 mosfet 100 reverb twin 19861991 52 mosfet 100 reverb twin 19861991, solidstate combo guitar amp from marshall in the mosfet series. Marshall 3210 lead 100 mosfet in 1984, marshall launched a 34 scale line of amps, consisting of the 2204s a 50w singlechannel amp, a dual channel solid state preamptube power amp hybrid the 30w artist 3203 and this one the 100w mosfet model. The clean section is only solidstate, whereas the tube drive section delivers exactly what it says tube like tone out of a hybrid head amplifier. Marshall lead 100 mosfet model 3210 was a solid state amp made from mid 80s to early 90s. I ended up getting rid of it because it didnt have enough clean headroom. Clearish sound at the beginning and then some gain. In addition to the drain, gate and source, there is a substrate, or body, contact. Fm and vintage modes the tone control is a very effective circuit that can smooth out or enhance upper harmonics, with 12 oclock being about neutral. The effective gate c in an amplifier is increased through the action of the miller capacitance.
The mosfet is a really good solid state amp just as others have said, it sounds very much like a valve jcm800. Nores series operation of power mosfets for highspeed. Mosfet power, single, nchannel, so8 fl 30 v, 93 a features. A buddy of mine now has a pawn shop and i dropped by to check it out. Marshall lead 100 mosfet solid state guitar amp head 1986. Generally the 50 or 25 volt value is a good place to start. It was one of marshall earliest solid state amplifies and predates the. To the minds and ears of many, the 100 watt super lead heads of the mid to late 1960s are the holy grail of great rock tone. This is not tube amp but very nice to make some tone that i like, and its not so expensive for 100 watt. Free marshall diagrams, schematics, service manuals. High voltage, high efficiency mosfet rf amplifiers. I did some research and found it was a solid state lead 100 mosfet, 3210, 100 watt, 2 channel amp.
Its good and all, but it takes alot of space, and it weighs like a cement mixeror a fender twin reverb head. Leadfree applications high efficiency synchronous rectification in smps 8. Wu,uc berkeley the nmos capacitor electrostatics charge vs. I am just wonder what foot switch the marshall lead 100 mosfet uses. These terminals are known as the gate g, the bulk b, the drain d, and the source s, and the voltages present at these terminals collectively control the current that flows within the device. This is not tube amp but very nice to make some tone that i like, and its not so expensive for 100. The b cabinet is a bit rough but it sounds better t. Im curious what you guys think of the lead 100 mosfet. Now that ive had this amp for a few days, i though id. I can get a marshall lead 100 mosfet head for a small amount of money. The mosfet uses a different type of gate mechanism exploiting the properties of the mos capacitor. None of the music stores in my town sold tube amps. I bought a used marshall lead 100 mosfet in 1990 i believe. The maximum breakdown voltage vb,max of the mosfet without a field plate is 996v at a gatedrain distance lgd of 9.
Because itd be great not to drag a combo everywhere me and my band go to play. I always avoid equipment discussion as i found it boring, but those old marshalls including mosfets. What caught my eye was a marshall head sitting in the back. Congratulations on your purchase of the with extended bottomend response, the first channel is the overdrive mode capable of clean boost compcut or more distorted overdrives. The marshall lead 100 mosfet model 3210 amp was produced in the mid to late 80s. This is not tube amp but very nice to make some tone that i. This was back in the days before i even knew tube amps existed. Inside the beast marshall mosfet 100 reverb youtube. Documents, presets, manuals marshall 3210 lead 100 mosfet 19841991 3210 lead 100 mosfet 19841991, solidstate guitar amp head from marshall in the mosfet series. Marshall mosfet 100 reverbtwin 100w 52 schematic marshall mosfet. Marshall 5215 mosfet 100 reverb 1986 1991 5215 mosfet 100 reverb 1986 1991, solidstate combo guitar amp from marshall in the mosfet series.
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