The stock speaker sucked period, i replaced it with a weber 12a125a 30 watt alnico, light dope and it sounds great. I had both the reissue jet j12t 15 watt and the superjet sj12t. Ampeg amps are pretty much their own thing not really a clone. You are looking at a vintage reissue ampeg reverb rocket tube electric guitar amp chassis. There are twin output jacks for hooking the j20 up to external speaker cabinets if the included 12 inch alnicoloaded.
It was always wellmannered, never speaking in harsh tones and at the flip of a switch, it really brightened up. The ampeg jet 20 j20 combo amplifier is a remake of the original jet. Musical instrument amplifier ampeg diamond blue j 20 jet owners manual. I also had a 15 ampeg cab not sure the model also hooked up but the problem was when i turn the vol past 2 or 3 oclock it cuts out. With its pointtopoint wiring, 5ar4 rectifier tube, 12 inch alnico speaker, and footswitchable, biasvary tremolo circuitry, the ampeg j 20 is a nocompromise guitar combo ideal for even the most toneobsessed guitarist. I love the amp, but it has a slight fizzbuzz in the top end when driven hard volume past 5. Premium jj tubes provide unmatched tone and classic ampeg eq offers flexibility and control. Ampeg diamond blue sj12r owners manual pdf download. It sounded fantastic, but after several long sessions playing really loudly in conjunction with an xotic ac boost it seemed to develop a problem.
Ampeg comes to the rescue with the j 20, a 1960sthemed 20 watt. The j20 jet features a volume and tone control, a speed and intensity control for the tremolo section, and a footswitch for turning the tremolo on and off. It has been along time since i have worked with this. Ampeg jet j 12d 1967 blue diamond image the one schematic drawing is of a 1968 amplifier which is the same schematic as the 1966, we have determined. I was just saying, in the christmas amp thread, that i went to gc yesterday to get some drumsticks for my son and walked out with a used ampeg j 12t. The tone king presents ampeg j20 point2point all tube amp. Skip to main content skip to footer site51906655 used 1906655 ampeg j 12t jetii tube guitar combo amp.
Transformer set could be better and the stock noname alnico speaker will not. Recentreissue jet 12t two el84 tubes 4, 8 and 16 ohm taps upgrade. The ampeg j20 diamond blue jet amplifier requires the following components. With unsurpassed craftsmanship, unwavering dedication to meticulous quality control and use of only the most premium components, the heritage line exemplifies ampeg. Part of ampeg s diamond blue lead series, this alltube amplifier is the product of ampeg s toneobsessed engineering staff who came up with the nocompromise design of the 20 watt, pointtopoint wired j 20 combo.
A 20 watts 1x12 combo, circuit is a rip off of the tremolochannel of the 6g3 deluxe. This is being sold as is for parts or a restoration project. Our tube replacement kits are designed for your amp and come in. The j 20 jet tube guitar amp is a retrostyled sweetheart of a combo amp highly evocative of the 60s in attitude and tone. Other than maybe a new speaker and some new tubes i hadnt considered. Great little amp once i got all the vibration issues taken care of.
See who uses ampeg j20 jet 20w 1x12 tube guitar combo amp, including. I installed a new matched set of el84s two weeks ago with the understanding that this is a self biasing amp. Given the small price differential, im looking for advice as to which way to go. Retube your ampeg j20 diamond blue jet amp with our preselected audio tube kits. The ampeg diamond blue series j 20 jet was a pleasure to have in gearwire studio. Ampeg j12t jet ii guitar amplifier, played clean youtube. Seems im always thinking of other things to do, and this is no different. Has anyone out there had their ampeg j20 amp modded. In this era, the model was also designated as the j 12d jet and used a solidstate rectifier. I changed all the tubes and the fizz was still there. The amp is point to point wired which gives it a great basis for mods or repairs, however it had a few weak points. I have an ampeg j12r reissue i picked up a few months ago. Ampeg j20 jet 20w 1x12 tube guitar combo amp woodwind.
Ampeg jet j 12 a vintage 60s amp tube guitar amp combo amplifier excellent cond. The sole exception is their last gasp, the j 20 jet, which is allegedly handwired, albeit in vietnam with low quality components, and has rattling issues. I loved my ampeg ba 210 for its weight,size, and tone. The ampeg jet 20 is nothing but a handwired clone of a fender brown face 6g3. The ampeg j20 is a very cool amp from ampeg that is very closely modeled after the old brown fender deluxe, the 6g3 circuit. I replaced it with a fast acting 3a 250v fuse, and tried powering up the amp again. No reverb, but a good sounding amp really dont need it. The circuit surprise also has nothing in common with vintage ampegs. Ampeg j20 jet 20w 1x12 tube guitar combo amp musicians. Ampeg j20 jet december 30, 20 november 30, 2017 steve 6 comments. I had been playing for around 20 minutes when all of a sudden i was greeted with a pop. This tube features balanced sections and gold plated pins.
I just purchased a used ampeg jet j12t combo reissue. The most notable issue is the handle has some of the stitching coming. J 20 s preamp section utilizes three 12ax7 tubes and twin 6v6 power amp tubes provide sweet clean or overdriven tone. Used ampeg j12t jetii tube guitar combo amp guitar center. I prefer its sound over a blues jr or pro jr or similar. Each amplifier is tested to confirm that it meets our specifications, and. Ampeg j12t jet ii discussion in amp central station started. I cant remember what speaker is in it, but i believe its the original, whatever ampeg used for the jet models in the early 90s. Part of the diamond blue lead series, the j 20 jet s retrostyling is highly evocative of the 60s in attitude, as well as tone. I like midicontrolled channelswitching, tonesculpting mega amps as much as the next dude sometimes more, i think, but sometimes theres nothing finer than plugging into a very simple valve amp and letting rip. View and download ampeg diamond blue sj12r owners manual online. Had a preamp tube 12ax7a7025 go microphonic on me last week. In your experience, is this normal and part of the sound of these amps, or is there possibly something wrong with it.
So much more than the average reissue, we take legendary pieces of gear from ampeg s rich history and breathe new life into them. The tube amp library of information click the link above for tube amp info, schematics, board building information, projects, mods, transformer diagrams, photos, sound clips. I did swap out the tubes for jjs and i also took out the stock alnico speaker. My ampeg ba115 has started blowing fuses as soon as i power on the amp. I am selling a 2009 ampeg j 20 jet tube guitar combo amp leave it to the toneobsessed engineering staff at ampeg to come up with the nocompromise, 20 watt, alltube, pointtopoint wired j 20 combo. The stock alnico speaker in j20 is okay when played clean but falls apart when the volume gets urgent. Find great deals on ebay for ampeg j20 and ampeg jet. The latest guitars, basses, amps and effectsshop now. Save up to 20 % on select keys and controllersshop now. Vintage vs reissue ampeg j12 electric guitars harmony. Why the hell didnt this amp turn into a best seller. The pi is a splitphase type with a driver stage before it, feeding a pair of cathodebiased 6v6s with a. The reissue genalex gold lion ecc83b759 recreates the sound signature of the original.
Hasse mods for the ampeg j20 guitar amp the following is adapted from a post i put up on the gear page, in the amp techincal forum. The model j 20 jet is not an actual reissue of any early ampeg model and is said to be based on a fender ampwas this fire risk amp a new handwired j 20 or the earlier reissue jet the new j 20 is made in korea or somesuch while there was a smaller 15 watt american made jet that had reverb and a pcb that was less expensivewas it. The nocompromise 20 watt, alltube j 20 s retrostyling is reminiscent of the 60s in attitude, as well as tone. Like other ampeg amps of this era, the jet 12 experienced some variation both in its enclosure style as well as in its electronic configuration. Ampeg jet model j12 20watt 1x12 guitar combo 1960s reverb. Tubes for the ampeg j20 diamond blue jet ce distribution. Id really like to see ampeg reissue a couple of their classic guitar amps as highquality americanmade pcbbased amps like other manufacturers vintage reissues. As soon as i hit the power button, the fuse blew again. The year of manufacture was identified using info from ampeg archives and the cts pot date codes as follows. So, half and below of that is a real good price for what it is. It is not a clone, there are some differences, but it is remarkably close, and it does have the great bias vary tremelo, as used in the 6g3 deluxe and also in amps like the princeton reverb. The amp was clean, but a tad musty not smelly though and still had the protective plastic on the faceplate and a set of jj el84s in their boxes in the back. Alltube guitar amplifier with tremolo effect 12 pages musical instrument amplifier ampeg svt4 pro owners manual.
This amplifier is the ampeg j 12a combo tube amplifier circa 1964 with one rola 12 speaker, tube tremolo circuitry, two 6sl7 preamp tubes and two 7591a power tubes providing around 15 undistorted watts. Theres been many types and variations of the j 12 so im not sure which one mine is but the fact that it has a tremolo feature on it must relate to the j 12t model in some way. It is a single channel amp with tremolo and a grand total of 4 knobs. The model j20 jet is not an actual reissue of any early ampeg model and is said to be based on a fender amp was this fire risk amp a new handwired j20 or the earlier reissue jet the new j20 is made in korea or somesuch while there was a smaller 15 watt american made jet that had reverb and a pcb that was less expensivewas it. Like all ampeg products, your j20 jet amplifier is designed by musicians and built using only the best components. I also purchased a new ampeg j 20 reissue pretty darn cheap about 6 months ago. The other has a jet ii reissue, j 12t, priced at 399. December 30, 20 november 30, 2017 steve 6 comments.
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