Like all ampeg products, your j20 jet amplifier is designed by musicians and built using only the best components. I have an ampeg j12r reissue i picked up a few months ago. December 30, 20 november 30, 2017 steve 6 comments. The reissue genalex gold lion ecc83b759 recreates the sound signature of the original. See who uses ampeg j20 jet 20w 1x12 tube guitar combo amp, including. View and download ampeg diamond blue sj12r owners manual online. Ampeg comes to the rescue with the j 20, a 1960sthemed 20 watt. You are looking at a vintage reissue ampeg reverb rocket tube electric guitar amp chassis. Musical instrument amplifier ampeg diamond blue j 20 jet owners manual. The stock speaker sucked period, i replaced it with a weber 12a125a 30 watt alnico, light dope and it sounds great. 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. The ampeg j20 is a very cool amp from ampeg that is very closely modeled after the old brown fender deluxe, the 6g3 circuit. Skip to main content skip to footer site51906655 used 1906655 ampeg j 12t jetii tube guitar combo amp.
As soon as i hit the power button, the fuse blew again. I changed all the tubes and the fizz was still there. 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. The tone king presents ampeg j20 point2point all tube amp. This tube features balanced sections and gold plated pins. Vintage vs reissue ampeg j12 electric guitars harmony. A 20 watts 1x12 combo, circuit is a rip off of the tremolochannel of the 6g3 deluxe. 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. The stock alnico speaker in j20 is okay when played clean but falls apart when the volume gets urgent. It was always wellmannered, never speaking in harsh tones and at the flip of a switch, it really brightened up.
Ampeg jet model j12 20watt 1x12 guitar combo 1960s reverb. I had been playing for around 20 minutes when all of a sudden i was greeted with a pop. The other has a jet ii reissue, j 12t, priced at 399. I replaced it with a fast acting 3a 250v fuse, and tried powering up the amp again. The amp is point to point wired which gives it a great basis for mods or repairs, however it had a few weak points. So, half and below of that is a real good price for what it is. 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 j 20 jet tube guitar amp is a retrostyled sweetheart of a combo amp highly evocative of the 60s in attitude and tone. I did swap out the tubes for jjs and i also took out the stock alnico speaker. Ampeg jet j 12 a vintage 60s amp tube guitar amp combo amplifier excellent cond. The ampeg jet 20 is nothing but a handwired clone of a fender brown face 6g3.
I prefer its sound over a blues jr or pro jr or similar. Ampeg j20 jet 20w 1x12 tube guitar combo amp woodwind. The latest guitars, basses, amps and effectsshop now. Ampeg amps are pretty much their own thing not really a clone. 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. Great little amp once i got all the vibration issues taken care of. Ampeg j20 jet december 30, 20 november 30, 2017 steve 6 comments. Retube your ampeg j20 diamond blue jet amp with our preselected audio tube kits.
Other than maybe a new speaker and some new tubes i hadnt considered. In your experience, is this normal and part of the sound of these amps, or is there possibly something wrong with it. 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. I loved my ampeg ba 210 for its weight,size, and tone. Why the hell didnt this amp turn into a best seller. Good shape overall, some scuffs in the tolex, no grillcloth issues, some drips on the faceplate but the original plastic has never been taken off. 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. Used ampeg j12t jetii tube guitar combo amp guitar center.
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. Ampeg j12t jet ii guitar amplifier, played clean youtube. Has anyone out there had their ampeg j20 amp modded. Tubes for the ampeg j20 diamond blue jet ce distribution. 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. It has been along time since i have worked with this. Had a preamp tube 12ax7a7025 go microphonic on me last week. 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. Premium jj tubes provide unmatched tone and classic ampeg eq offers flexibility and control. Transformer set could be better and the stock noname alnico speaker will not. With unsurpassed craftsmanship, unwavering dedication to meticulous quality control and use of only the most premium components, the heritage line exemplifies ampeg.
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. Our tube replacement kits are designed for your amp and come in. The circuit surprise also has nothing in common with vintage ampegs. The year of manufacture was identified using info from ampeg archives and the cts pot date codes as follows. Each amplifier is tested to confirm that it meets our specifications, and. Alltube guitar amplifier with tremolo effect 12 pages musical instrument amplifier ampeg svt4 pro owners manual.
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. The ampeg j20 diamond blue jet amplifier requires the following components. Id really like to see ampeg reissue a couple of their classic guitar amps as highquality americanmade pcbbased amps like other manufacturers vintage reissues. Seems im always thinking of other things to do, and this is no different. I love the amp, but it has a slight fizzbuzz in the top end when driven hard volume past 5. The nocompromise 20 watt, alltube j 20 s retrostyling is reminiscent of the 60s in attitude, as well as tone. 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 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. It sounded fantastic, but after several long sessions playing really loudly in conjunction with an xotic ac boost it seemed to develop a problem. Given the small price differential, im looking for advice as to which way to go. My ampeg ba115 has started blowing fuses as soon as i power on the amp.
There are twin output jacks for hooking the j20 up to external speaker cabinets if the included 12 inch alnicoloaded. It is a single channel amp with tremolo and a grand total of 4 knobs. 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. Ampeg j20 jet 20w 1x12 tube guitar combo amp musicians. I also purchased a new ampeg j 20 reissue pretty darn cheap about 6 months ago. Ampeg j12t jet ii discussion in amp central station started. J 20 s preamp section utilizes three 12ax7 tubes and twin 6v6 power amp tubes provide sweet clean or overdriven tone. 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.
The ampeg diamond blue series j 20 jet was a pleasure to have in gearwire studio. Find great deals on ebay for ampeg j20 and ampeg jet. Ampeg diamond blue sj12r owners manual pdf download. The ampeg jet 20 j20 combo amplifier is a remake of the original jet. No reverb, but a good sounding amp really dont need it. 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.
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. In this era, the model was also designated as the j 12d jet and used a solidstate rectifier. Save up to 20 % on select keys and controllersshop now. Recentreissue jet 12t two el84 tubes 4, 8 and 16 ohm taps upgrade. I just purchased a used ampeg jet j12t combo reissue. This is being sold as is for parts or a restoration project. I had both the reissue jet j12t 15 watt and the superjet sj12t. The pi is a splitphase type with a driver stage before it, feeding a pair of cathodebiased 6v6s with a. 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 installed a new matched set of el84s two weeks ago with the understanding that this is a self biasing amp.