Welcome to Two Track Music

Guest/Visitor, welcome to the Two Track Music forum area.  If you're not yet a member here, just click the Register link above to sign up.  It's free, quick, and relatively easy.

Once registered, you will be able to post anywhere in the forums, create topics, ask questions, show off your music, and collaborate with other members to create a new song or musical piece.

You will also be able to view post attachments, which are usually songs in progress or completed songs.  And, you'll have access to our TTM Articles section, which contains a variety of articles on software, hardware, mixing, mastering, and many other topics.  The forum Search option will also be available to you once registered.

Two Track Music is a somewhat 'laid back' community.  Just some good musicians and song writers hanging out, and having a good time.  We're not a high pressure or fast paced site, we just enjoy kicking back and making some music, and having fun while we're doing it.

If that sounds like your kind of place, please join us.  We'd love to have you in the mix.  And yes, pun intended... ;)

Additional Menu

TTM Shoutbox

Last 15 Shouts:



August 17, 2019, 05:18:14 PM
If anyone wants a FREE copy of my album, it'll be in the Neilmac folder on the ftp for a while - mp3 or wav


August 17, 2019, 05:00:31 PM
Archive updated, Soundcloud cleared for your ODC entries


August 16, 2019, 01:49:31 PM
It's been dry mid to i-70s here south of Boston.

Great sleeping weather in the 60s with a nice breeze.



August 14, 2019, 03:39:20 PM
Big boom booms last night Smurf some hail and major rain , trees bending over and touching their roots.  Crazy but lucky we didn't have any call outs . More coming though lol 😁


August 13, 2019, 02:29:09 PM
England weather here today.....no offense to our buddies across the pond!  8)


August 13, 2019, 11:10:25 AM
Heat wave city again ! 106 heat  index for today . Yaaaaah 😑


August 10, 2019, 08:44:13 PM
Happy rainy Saturday folks! Good day to do some recording  8)


August 09, 2019, 06:14:38 PM
 ;Haha 😄


August 09, 2019, 04:37:39 PM
Was that the Cat in the Hat?  :P :P it was! It was! Lol


August 08, 2019, 10:45:20 PM
I don't care about pops I just want to see the hat !  :P


August 08, 2019, 05:46:01 PM
Hope it all goes well for you, G.  Look forward to seeing you more often.  And hopefully I can get kind of caught up here, too...


August 08, 2019, 04:58:17 PM
Hi kids, a  lot of stuff happening for me and seems to settling a bit. Hopefully can get caught up here soon and back in the swing of things.


August 08, 2019, 04:31:17 PM
Well, it took 2 days, but I got the power steering fixed, the oil changed, and all the brakes replaced on the van.  Tomorrow it's the brakes on the car.  And then all the plow truck work...  ???


August 08, 2019, 08:02:01 AM
Thanks Joom . It's not in stone yet lots to work out.
Lost my dad to cancer .wish that went another way . :(


August 07, 2019, 11:05:52 PM
Good luck with that, Ag.  I lost my Dad back in 1993.  Wish they were still here to take care of...

Show 50 latest
Welcome, Guest. Please login or register.
August 22, 2019, 10:34:50 AM

Login with username, password and session length

Author Topic: Jet city JCA22H amp  (Read 833 times)

0 Members and 1 Guest are viewing this topic.

Offline agradeleous

  • My stuffs
  • Original
  • Producer
  • *
  • Join Date: Oct 2013
  • Posts: 3009
  • Karma: 4
  • Just hangin' here at TTM Upside Down
    • View Profile
    • Ags YouTube
Jet city JCA22H amp
« on: November 18, 2013, 05:42:53 PM »
Since I posted my tube issue I figure I'd post some meaningless info ... Ok so My power tubes or one for sure was wasted as in spiral amp thread the tubes I bought are these and here are some very shaky break downs LOL 

JJ EL84 / 6BQ5   JJ-EL84   These tubes instantly made a world of difference ... everything just jumped to life cool ... I can't give the whole micro phonics break down but the whole sound just tighten up .

  A note to consider , these amps are designed as high gain and there's boat loads of info on moding . The amp is 2 channel,  Crunch and then Crunch and munch devastation.

  So my goal is to try and cut down all the munching going on and clean the crunch channel up so there's more chunk with a little crunch then just plain full on crunch 

pre-amp tubes below were tested in V1 only and I'll give my lame'O description of what I heard 

JJ ECC83 / 12AX7   JJ-ECC83 ......  original tubes are Chinese 12ax7b's whats the B ? had to look that up, still not sure but one thread says designed with more over drive then the plain AX7.  All 5 pre-amps tubes are these in this amp.

Ok so what I heard for the replacement JJ was not that great ... the sound was a little darker, more muddy and notes seemed to get lost a bit . see simple break down LOL

JJ ECC81 / 12AT7   JJ-ECC81 ........ This tube was said to cut the down the gain a good bit which is what I am after so in it went .

  Wow ! nice it cut the gain the crunch channel sounds a lot better and leans more to the clean side . Now one thing I remember from my old Kustom quad 100 was the clean with the same guitar had a really cool pop and bright sound to it using the single coil setting so I always have that sound in my head .

  This was close , it was there but did not have the punch . The rhythm or neck position well lets forget it this amp don't care at all for that sound and the only thing that would is a full on mod and new pick ups ! :P 

  The lead was ok more like cleaner crunch channel no munch just clean crunch hahahaha  it was lacking

JJ 5751 Preamp Tube ......... The winner !

    This tube was said to be in between AX7 and AT7 leaning more towards the higher side of the AX7  And this one is the winner the lead channel has great definition the right amount of gain with a tad of munching going on .

   The clean was as close for the tubes I have to get close to the Quad 100 as described above .. Blues sound is way better as well on this channel of now less crunch and no munch .  :D 

   Turning up the gain sound really round it up some . Guitar Volume plays a good part as well which most if not all you know. 

Ok so some more notes to consider;  ::)

I have no idea what I speak of

There's to many variables to explain anything when it comes to this stuff  .....  Tube brands , peoples own hearing , amp designs , guitar types , speaker types , cabinets , speaker size and number ...... you get the idea .

Settings on the amp I used for this .... are in the pics what to look at is gain settings and master   no 10's LOL 

last comment would make more sense if there was some sound samples .... Sorry I'm interfaceless at the moment  :o :(

I will try and switch out V2 and V3 positions tomorrow to hear what changes they will make with the two tubes I have left and maybe mess with mixing 1,2,3 line up with what I have to see what that does ... I seem to have the time LOL

3rd pic is the bad El84s one must be older then the other because it has a different color logo ink but thats a weak point to make LOL but all I have :) 

« Last Edit: November 18, 2013, 06:02:44 PM by agradeleous »