I bought the combo not long after they came out and while id been swapping filter caps and biasing my own amps a while i had just started getting into modding and digging deeper into amps then. Distributors and dealers are not agents of jet city amplification and have no authority to bind jet city amplification by any expressed or implied undertaking or representation. Both of my jet city amps will receive this mod along with a future depth mod as well parts need to be purchased. With the jca20hbes, jet city takes that concept a step furtherteaming with noted amplifier technician, builder and mod master dave friedman of rack systems to modify an existing amp in the jet city line, the 20watt jca 20h. I have an acquaintance that is selling a jet city jca20 he. The jca20hs preamp section is based on the crunch channel of the slo100, and its capable of a surprisingly wide range of gain. Im digging up a zombie thread but im about to dig into my jca2112rc. Jet city amplification jca20hv owners manual thank you for your support. Jca20h with el84 triode pentode switch and schematic. It features a pair of el84 tubes in the power amp, partnered with a quintet of 12ax7s in the preamp the rectifier is solid state. Jetcity jca50h sch service manual download, schematics. From what ive seen so far, the circuit board is basically a jca20h, with some.
Jca20h block diagram jca20h block diagram titel size a3 model no. I also purchased a bias probe from eurotubes, and biased it up to 70%. We tested the characterful and very affordable 20watt amplifier head from jet city. View and download jet city amplification jca20h owners manual online. The jet city amplification jca22h also has a global presence control that lets you add high end sparkle to both channels. Jetcity jca20h sch service manual download, schematics. We do not accept liability for typographical errors or inaccurate information of any kind. Dec 31, 2012 im digging up a zombie thread but im about to dig into my jca2112rc. Jet city amplification jca5012c 50w 1x12 tube guitar combo amp. The manufacturing and design quality are faultless, the soldanolike sound is a delight and the price is just amazing.
The jc are different from bugera in that the jc is designed by people who know their amps, and arent just reverse engineering other models. I called jet city and they also confirmed that is normal. Soldano and thd essentially are working together, thd on the picovalve, mike on the bigger models. Massive discounts on jet city amplification heads, cabinets and combos. Open quick view dialog for jet city amplification shockwave distortion guitar effects pedal. Other features include a tubebuffered serial effects loop, multiple speaker impedance outputs, and a footswitch input for. Discussion in the loudhouse started by modern saint, apr 17, 2011. The mods are from a schematic said to be from a friedmanmodded jca20, which are pretty much the standard jose mods, plus an additional depth control, which i installed in one of the 8 ohm speaker outs to. Jun 07, 2012 the jet city jca20h is a single channel 20 watt alltube amp, with el84s in the poweramp. Jet city amplification jca22h jca50h jca100h jca100hdm to soldano slo and soldano avenger conversion captainbob jet city jca50 modifikationen guitar amps simple as f. Jet city jca20h sch service manual download schematics.
We liked the way it sounded so much, we decided to put i. To get the gain i required i needed to remove some of. Modding my jet city jca20 to bespecs metropoulos forum. Jet city jca20h 20 watt head with friedmanjose mods plus.
Designed by mike soldano himself the jet city jca20h is a single channel amp designed for a modern yet versatile tone. Jet city amplification warrants the mechanical and electronic components of this product to be free of defects in material and workmanship for a period of one 1 year from the original date of purchase, in accordance with the warranty regulations described below. Jet city was formed in 2009 by mike soldano and douglas white with the aim of providing quality, alltube amplifiers at an affordable price. The schematic was a way of changing a stock jet city 20w without needing to remove the board or any components. Your jca20hv was designed by the worldrenowned tube amp designer mike soldano, in seattle, washington, and meticulously assembled to assure that it meets the highest quality standards and value. Jet city attacks in the literal term of the word the compact tubeamp market with a small, alltube and characterful 20watt head. In no event shall the liability of jet city amplification exceed the invoiced value of. Jet city jca20h features 20 watt head pairable to a 16 ohm or two 8 ohm speaker cabinets 3x 12ax7 preamp, 2x el84 power tubes and a solid state rectifier preamp, bass, middle, treble, master, presence controls multiply, voidfree hardwood cabinet with 16 gauge, coldrolled steel chassis multitapped power transformer and standard iec connector. This site helps you to save the earth from electronic waste. This has the friedman brown eye mod done to it as well as the sat switch option located on front of the amp. The purpose of this thread is going to be for discussing mods to the jet city 20h, or any other topic pertaining to the jca model 20h.
People have been talking a lot about jet city amps, which are designed by well. Theres no reverb circuit, however you can use an external effect in the loop. The mods are from a schematic said to be from a friedmanmodded jca20, which are pretty much the standard jose mods, plus an additional depth control, which i installed in one of the 8 ohm speaker outs to keep from drilling any new holes. The jca 20h owners club and mod threadyes i do custom modsparts listsmod other amps, pm me for more infopricing. Amplifiers by soldano custom amplification come with a hefty price tag, so designer mike soldano teamed up with jet city amplification to offer a series of amps that carry through the essence of his designs at a much lower price point than the sometimes shocking price tags found on amps like the legendary slo100. Preamp gain, bass, middle, treble, master, presence, depth switch. I decided it would be sweet to start a jet city jca20h owners thread.
Bringing you the best jet city amplification deals in the uk from our online shop. Jet city amplification jca2112rc 20w tube guitar combo amp. The jet city amplification jca2112rc 20w 1x12 tubedriven combo takes all the tone and punch of the jca20h head, adds real tube reverb and pairs it all with a single 12 jet city eminence speaker rated at 100w rms. Offers include vat and are valid as long as stocks last. If youre not familiar with tube amps, then you should know that 20 watts is actually pretty loud. Building on their jca20h singlechannel guitar amp, jet citys alltube 20hv features a revoiced signal path, depth control, and a. Jet city plays in the latter category with its alltube amps sold at prices terrorizing all competitors. In the friedmancircuit the gain control comes after the second gain stage.
With the jca20hbes, jet city takes that concept a step furtherteaming with noted amplifier technician, builder and mod master dave. After eyeballing the worlds most useless schematic the jet city 20, hope its the right schematic i managed to ascertain that yup, it is fixed bias. The goofy thing about the jet city schematic is all the component values are in a separate appendix. Jet city 333 jca20h hsg mod high saturated gain with schematic circuit diagram. Jet city amplification jca20h owners manual pdf download. If you really know how to use a tube amp you can coax a hundred different tones out of it.
The jca22h is basically the companys renowned jca20h amp but. Quote originally posted by jet city amps view post. It sounded good but from what ive read on the net, it can sound a lot better i had all the parts i needed for the depth control lying around, so i tried it. It uses 3 x ecc83 and 2 x el84 valves for anything from spanky cleans to crunchy overdrive. The best value replacement valve kit for jet city jca20h on the market today. The only thing nearly as dumb as the jet city schematic is fixed bias in an 18 watt el84 amp. The jca22h is basically jet citys killer jca20h amp, but with a second, footswitchaccessible overdrive channel along with a tubebuffered serial effects loop.
Service manuals, schematics, eproms for electrical technicians. Other features include a tubebuffered serial effects loop, multiple speaker impedance outputs, and a footswitch input for switching channels on the fly footswitch included. Design by soldano this little 20w guitar tube amp head sounds really good check it out. The jet city jca20h tube amp head delivers pure tube tone from a singlechannel amplifier with absolutely no gimmick features to dilute the alltube signal path. Apr 17, 2011 this mod will tighten up the dc voltage and will remove any type of inherent 60 cycle noise that maybe prevelant. A legendary guitar hero asked if we could tweak his 20h to be just a little cleaner, and a little darker.
The jet city jca20h is a single channel 20 watt alltube amp, with el84s in the poweramp. Replacement valve kit for jet city jca20h amplifier. Jan 30, 2012 jca20h with el84 triode pentode switch and schematic circuit diagram. The company prides itself on high levels of build quality and reliable, costeffective components paired with mikes legendary knowledge of tone circuitry and experience. Jet city 333 jca20h hsg mod high saturated gain with. Building on their jca20h singlechannel guitar amp, jet citys alltube 20hv features a revoiced signal path, depth control, and a postmaster effects loop. Discussion in member classifieds started by riverratt, jun 21. Elegance of design both inside and out deliver unflinching reliability in a guitar amp goodlooking enough to make a girlfriend jealous. The idea was you could very quickly do the mod, and return to stock if it wasnt for you. Up for grabs is this soldano designed jet city jca20h modded by david friedman. I have a balanced 12ax7 in the v3 position, and a matched pair of el84s. Jet city amplification has an unpretentious approach to guitar amplification simple, focused, and greatsounding products for guitarists. Jet city amplification jca 22h guitar amplifier mixdown. When famous guitar amp developer mike soldano is leading a fully new brand of affordable tube amps it is hard not to pay attention.
Jet city amplification jca20h 20w tube guitar amp head guitar. People have been talking a lot about jet city amps, which are designed by well known amp designer mike soldano. By adding this cap the feedback of low frequencies into the driver stage is. In this video guitar worlds gear editor paul riario demonstrates the features of the jet city jca20h amplifier head. The jet city jca20h is a single channel, 20watt head with a point to point signal path. Thats a nice reference, so i checked the jet city product line and went for a jet city jca20hv. There is a similar thread on harmony central, but it is more focused on mods. It is not so well known as the jca20h single channel either and the jca22h two channels. The jet city jca20h tube amp head delivers pure tube tone from a single channel amplifier with absolutely no gimmick features to dilute the alltube signal path. Jet city 20 head red plate telecaster guitar forum.
They offer pedals, an attenuator, an isolation cabinet, and various other tools for guitarists. Initially made for those unable to afford a soldano slo100 this is. Jet city amplification jca22h service manual pdf download. A a charles saufley is a writer, editor, and musician from san francisco. The jca22h is basically the companys renowned jca20h amp but with a second. The focus is on highquality materials, and robust build quality. Elegance of design both inside and out deliver unflinching reliability in a guitar amp. Jet city amplification jca20h 20w tube guitar amp head. I put a set of reflector 6p14p output tubes in it and nos pres. Jet city jca20h 20 watt head with friedmanjose mods plus depth control. Jca20h with el84 triode pentode switch and schematic circuit diagram. Jca20h 20w tube guitar amp head the jet city jca20h tube amp head delivers pure tube tone from a singlechannel amplifier with absolutely no gimmick features to dilute the alltube signal path. Easy improvements to embrace the stock jca20h is an easy amp to navigate and use. The crunch channel really doesnt have much clean signal at all, with the od turned all the way down for no bleed and the crunch master up with the gain as low as it will go and still make a noise there is still a little breakup when you hit the strings hard.
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