59 bassman tube layout software

The ltd also comes with the tube rectifier and the ri has a solid state one, but that can easily be removed and a tube rectifier installed, as the ss rectifier is plugged into a tube socket. All of my tube sockets are military grade along with the 5881 output tubes being military grade. The circuit, cab, speakers, and face are closer to the original 5f6a. Many collectors rank the original 59 bassman as one of the greatest amps ever made.

It is brighter and harsher sounding and the overdrive is not the same. The tracings are hard to see on black or brown sockets. The main focus is on the presets and the five separate modules. Selecting either a preset or a specific module will then fill the gui screen for tweaking. Made in usa reissue solid state rectifier from 19902003, made in mexico ltd tube rectifier from 2003present. There go a whole lot of your bass response problems in one fell swoop. Wish 59 bassman jumped fractal audio systems forum. Prowess amplifiers fender schematics bassman ab165 layout. May 16, 2016 fender 5f6a bassman video 1 frenchie films. But ive decided to go with four good 10 speakers from weber. Fender amp preamp tube layout and recommendations kca. From right to left, they implement a firststage preamp, a secondstage voltage amplifier and dccoupled cathode follower, a longtailedpair phase inverter. I have a 1991 59 bassman ri and i am curious about the purpose of the three 12ax7 slots.

Pcb assembly chassis assembly cabinet assembly miscellaneous schematicsdiagrams fender musical instruments corp. In the 90s, fender released an affordable 59 bassman reissue amplifier to great acclaim. Ground switch is deleted, 3prong power cord, balanced 6. The power amp included a long tailed pair phase inverter, an innovation that noticeably increased the headroom or clean. Now i only play through this tweed circuit to get a bit grittier sound. We have a huge schematics inventory, projects section and forum. Fender 59 bassman operating instructions manual pdf. At the fender factory they used old tube charts when new models came, probably because the. Also, if a resistor pops sometimes the power tube first arc across the pins. You might like this if you add it to the 5f6a circuit.

This amp has the original tweed, speakers, transformers, grill and tube chart. The two test points connect to 1ohm 2watt resistors that are inserted into the cathodeground paths of each power tube. Prowess amplifiers fender schematics bassman ab165 schematic. I think i finally decided the amp i need to get is a bassman 59. The previous version of the bassman 5f6 had a 25uf25v bypass cap on the second tube 12ax7 across the 820 ohm cathode resistor. So the first change was to put a real 5u4gb into the amp and rebias.

Sep 28, 2019 have you tried on a jm45 jump model raising sag up to 7. On domestic us versions of the amp, there is a ground switch. Though this is more expensive than my peavey, is it any better or different. Mod your bassman reissue for vintage tone to start i. Because of the high demands placed on this tube by the fender reverb driver design, its important to get a good quality 12at7 for this slot. The fender bassman is a bass amplifier introduced by fender during 1952. This is, in our opinion, perhaps the most important continue reading american classics 5f6a bassman. At the fender factory they used old tube charts when new models came, probably because the tube layout was the same. This vintage reissue is an alltube 4 x 10 beauty that offers up 45 watts for your gigging and recording pleasure. Updates for the 59 bassman ltd include a tube rectifier original spec 5ar4, an internal bias pot, a pair of usmade groove tubes 6l6ge output tubes, as well as a quad of jensen p10r reissue 10inch alnico speakers. Not too surprising then that fender reissued this model starting in 1990.

Fender 59 bassman reissue 45watt 4x10 guitar reverb. Just seems a bit low for being max bias on this thing. I am reasonably certain that i am running lower plate volts than stock as i switched over to the jj rectifier. Hi all, i have a 1991 59 bassman ri and i am curious about the purpose of the three 12ax7 slots. The tubes from the factory are of decent quality and sound great. I am a huge fan of the 6g6, 6g6a and 6g6b circuits late 50s, early to mid 60s. The classic american amplifiers of the 50s and 60s inspired us to create the, errrrr, american classic series. Mar 30, 2014 through the 60s and 70s, the original alltube tweed 4x10 bassman was popular with rock, country and blues guitarists as a reliably greatsounding and easytouse guitar amp. Buy fender 59 bassman ltd 50watt 4x10inch tube bass combo amp. These 40 watt amps are known for their bold and pristine clean sound as well as their classic unmistakeable dirt. The bassmans wide stage coverage, touch sensitive dynamics, and fullfrequency swirl make it the perfect vehicle for building a great tone with. Mods for reissue fender tweed bassmans carls custom amps.

Also, youll notice that just about every other fender amp has grid stopper resistors on the grids of the power tubes. Bassman 200 20002005 one 15 speaker, one compression driver, 200 wattsrms solid state. Simply put, theres really nothing quite like the pure, powerful sound of a fender tube amplifier. They have been revived in boutique, handbuilt modern assemblies with improved components and design elements.

The fender bassman is a legendary guitar amp known to both guitar. The ltd also comes with the tube rectifier and the ri has a solid state one, but that can easily be removed and a tube rectifier installed, as the ss rectifier is. Fender guitar amplifier owners manuals current this article contains a list of all fender guitar amplifier owners manuals currently available. The jensen p10rs that come stock in the 59 bassman are one of its main weaknesses, in my view. Yes i know the originals came with gz34s, but this is what the tube chart called for and i was afraid that the extra heat from a gz34 might cause a problem with the pcb and or tube socket. View and download fender 59 bassman operating instructions manual online. Fender bassman59ltdri 45w 2channel 4x10 tube guitar. On the 59 bassman ltd recent reissue thats the max current i can get with 120v at the wall dialed in with variac with the bias pot all the way to the right. These updates are used in the fender 59 bassman reissue and are shown on my 5f6a layout at the top of this webpage. Buy the fender 59 bassman ltd, 45w 2channel 4x10 tube guitar combo amplifier. These expressions are useful implementation and veri. From a design standpoint, the ltd is a much better amp.

Prowess amplifiers fender schematics bassman ab165. A tweed bassman driving two 12 celestions in an open cab. The bassman is extremely versatile and has been used by tons of iconic guitarists from mike mccready, of pearl jam fame, all the way to stevie ray. Gz34 rectifier, 5881 output tube, 5881 output tube, 12ax7a inverter tube, 12ax7a preamp tube, and 12ay7 preamp. This amp features the same 4 by 10inch speaker layout of the late 50s. The fender has been reissuing the 5f8a 4x 10 tweed bassman for quite some time now and its one of fender better amps but it does not sound that much like a original bassman. Fender amp schematics to assist you with your amplifier repairs and modifications. This amplifier was made in the 50s, and was available as a 4. I put jj 6l6s in the power amp and eec8s in v1 and v3 in the preamp.

Hear rory gallaghers bassman, brian mays ac30, a marshall super bass and more. Prowess amplifiers offers resources for the guitar tube amplifier builder. Mojotones tweed bassman style amp is based on the late 50s 5f6a circuit. Heres what i posted elsewhere on this amp my 2 centsthe bassman ltd is far superior to the first addition tube rectifier and pine cabinet. Fender guitar amplifier owners manuals current fender. Bassman ab165 layout prowess amplifiers tube amplifier. Electro harmonix replacement tubes kit for the fender bassman 100. I briefly considered a mod like this for my super reverb. I use the bright channel and i want to know which slots effect the tone of that channel. Now presenting the ever popular, often copied but never duplicated original 4 x 10 fender bassman amplifier from 1959. The cap board is usually located outside the chassis in a dog house next to the choke but it will. Common and safe bias currents for bassman 6l6 tubes are between 20 and 50 ma per tube.

The tube charts are not very useful for determining the circuit model. Check the fuses on the circuit board see layout diagram at bottom of link. A lof of blackface bassman amps with aa864 tube charts are actually aa165s, and a lot of aa165 charts are glued into ab165 amps. Fender bassman 5f6a amplifier project by edmund henke on.

May 27, 2017 1960 fender bassman 5f6a vs fender ri 59 bassman ltd that has been gutted and hand wired. These classic vacuum tube amps from 1959 are often the first choice of todays awardwinning guitarists and professional musicians. It also didnt have the touch sensitivity of the real 59 bassman. Through the 60s and 70s, the original alltube tweed 4x10 bassman was popular with rock, country and blues guitarists as a reliably greatsounding and easytouse guitar amp. View and download fender 59 bassman service diagram online. The ceriatone 5f6a amplifier is based on the tweedcovered amplifier of the same designation. Fender 59 twin vs 59 bassman originals comparison duration. To view this site, you must enable javascript or upgrade to a javascriptcapable browser.

Rightclick to save the file or leftclick to open from your browser. There are some nice tung sol 5881 tubes in the power section. The layout notes that from this switch comes a white wire, which enters the filter capacitor. The information contained herein is confidential and proprietary to fender musical instruments corp. Standard tube set high quality tube set best quality tube set. Jul 04, 20 im looking at building a fender bassman 100 and have been studying pictures, the layout and schematic, and while im no expert i think i have a theory as to the mystery white wire. If you have a copy of an old fender guitar amplifier owners manual not shown in this archive, wed love to have a copy to post here. After downloading, the file may take a moment to open in the browser. Fender 59 bassman operating instructions manual pdf download.

Yes i know the originals came with gz34s, but this is what the tube chart called for and i was afraid that the extra heat from a gz34 might cause a. Build the worldfamous tweed bassman 5f6 guitar amplifier. Free shipping free tech support free 2year warranty. Output increased to 70 watts when cbs switched to an ultralinear output transformer. Each millivolt measured at a test point corresponds to 1 milliamp of cathode current. But, unless they are cleaned and removed, you may never get the amp to work properly. Fender vintage reissue 59 bassman vs peavey classic 50 my. Fender forums view topic 59 bassman reissue, low volume. I been proposed a deal through cl that will net me a fender vintage reissue 59 bassman. Biasing a fender 59 bassman ltd, 67ma reading max with pot. Have you tried on a jm45 jump model raising sag up to 7. Fenders new 59 bassman ltd reissue takes the amplifier even further or should we say backward. Here is the back of the amplifier where you can see 2 of the 10 woofers, and the tube setup.