Home› Musicians and Gearheads

Valve Junior Updates

All Those YesterdaysAll Those Yesterdays Posts: 2,723
edited August 2007 in Musicians and Gearheads
Apparently the new version of the Valve Junior, which is going for about $130 now, has upgrades to the circuit, which are common changes most people do. Including 1M input resisitor, and the proper 5 ohm output transformer.

So those of you who wanted one that didn't want to do the mods, have a chance to get one out of the factor with them done.

I'm probably one of the few who actually went back with the stock input resisitors (47k). THe 1M was just not my thing.
E. Lansing-98 Columbus-00,03,10 Detroit-00,03 (1&2),06, 14 Cleveland-03,06,10 Toledo-04, Grand Rapids-04,06 London-05, Toronto-05, Indianapolis 10, East Troy (1&2) 11, Chicago 13, Detroit 14

https://www.facebook.com/aghostwritersapology/
Post edited by Unknown User on

Comments

  • exhaustedexhausted Posts: 6,638
    still haven't done anything to mine other than the input resistor and a lower gain preamp tube.

    haven't had much chance to play it recently. or any of my amps for that matter.
  • All Those YesterdaysAll Those Yesterdays Posts: 2,723
    exhausted wrote:
    still haven't done anything to mine other than the input resistor and a lower gain preamp tube.

    haven't had much chance to play it recently. or any of my amps for that matter.


    Ah you did the 5751 in lieu of the 12ax7? I go that route most of the time. But have 12ax7's on stand by depending on the mood.

    My is exactly how I've had it. Still set up for the Dano. Doesn't sound bad with any guitar so far but it's perfect for the Dano. I'll probably change some things when the P90 Reverend finally get's shipped.
    E. Lansing-98 Columbus-00,03,10 Detroit-00,03 (1&2),06, 14 Cleveland-03,06,10 Toledo-04, Grand Rapids-04,06 London-05, Toronto-05, Indianapolis 10, East Troy (1&2) 11, Chicago 13, Detroit 14

    https://www.facebook.com/aghostwritersapology/
  • Pacomc79Pacomc79 Posts: 9,404
    how is the response of the 5751? What does it sound like?
    My Girlfriend said to me..."How many guitars do you need?" and I replied...."How many pairs of shoes do you need?" She got really quiet.
  • All Those YesterdaysAll Those Yesterdays Posts: 2,723
    Pacomc79 wrote:
    how is the response of the 5751? What does it sound like?

    More clarity for sure. Smoother. Response isn't effected, but I'm running through a 5 watt amp, so I'm pushing that single pre-amp tube right away. I use the Jan-Phillips NOS ones, not the new sovtek.
    E. Lansing-98 Columbus-00,03,10 Detroit-00,03 (1&2),06, 14 Cleveland-03,06,10 Toledo-04, Grand Rapids-04,06 London-05, Toronto-05, Indianapolis 10, East Troy (1&2) 11, Chicago 13, Detroit 14

    https://www.facebook.com/aghostwritersapology/
  • Pacomc79Pacomc79 Posts: 9,404
    sounds good. I'm going to take the shields off the ones in the Orange, probably get another Tung Sol 12AX7 to pair with my other one and two of those JAN 5751's to see if it can tame some of the harshness on the upper gain range of my orange.

    It's smooth to a point and then it gets mushy and fizzy.
    My Girlfriend said to me..."How many guitars do you need?" and I replied...."How many pairs of shoes do you need?" She got really quiet.
  • All Those YesterdaysAll Those Yesterdays Posts: 2,723
    Pacomc79 wrote:
    sounds good. I'm going to take the shields off the ones in the Orange, probably get another Tung Sol 12AX7 to pair with my other one and two of those JAN 5751's to see if it can tame some of the harshness on the upper gain range of my orange.

    It's smooth to a point and then it gets mushy and fizzy.


    Is it when it's on kill? EL84's get like that too. I can't remember what orange you have to know if it's a EL84 amp.
    E. Lansing-98 Columbus-00,03,10 Detroit-00,03 (1&2),06, 14 Cleveland-03,06,10 Toledo-04, Grand Rapids-04,06 London-05, Toronto-05, Indianapolis 10, East Troy (1&2) 11, Chicago 13, Detroit 14

    https://www.facebook.com/aghostwritersapology/
  • exhaustedexhausted Posts: 6,638
    i bought the matching 1x12 today. quite nice. lots of bass response. perhaps a little bright on the highs but that may be the amp itself. haven't run through different guitars and the pedals yet. just my casino straight in.

    so far above the little 1x8 combo in performance. granted, for almost double the money.

    just a nice little amp.

    5 watts of rock
  • All Those YesterdaysAll Those Yesterdays Posts: 2,723
    exhausted wrote:
    i bought the matching 1x12 today. quite nice. lots of bass response. perhaps a little bright on the highs but that may be the amp itself. haven't run through different guitars and the pedals yet. just my casino straight in.

    so far above the little 1x8 combo in performance. granted, for almost double the money.

    just a nice little amp.

    5 watts of rock

    Very cool. Maybe switch that speaker out with a vintage 30. I play thru that 2x12 avatar cabinet with a vintage 30 and G12H30. And that sounds awesome.

    You change that input resistor to something around 500 k, see if that helps the brightness enough.
    E. Lansing-98 Columbus-00,03,10 Detroit-00,03 (1&2),06, 14 Cleveland-03,06,10 Toledo-04, Grand Rapids-04,06 London-05, Toronto-05, Indianapolis 10, East Troy (1&2) 11, Chicago 13, Detroit 14

    https://www.facebook.com/aghostwritersapology/
  • exhaustedexhausted Posts: 6,638
    All Those Yesterdays wrote:

    You change that input resistor to something around 500 k, see if that helps the brightness enough.


    i put a tung sol 12AX7 and a JJ EL84 in tonight. also installed the bitmo duo tone/pull gain kit.

    had a chance to open it up with the new tubes and it's a nice little improvement. didn't get a chance to test run the tone/gain other than to verify it worked. seems like opening the tone is a gain boost in itself. i just wanted it to take a hair of harshness off.

    also have the 3-way gain switch kit but i'm not going to install it i've decided. i don't need more gain.

    if you or your buddy want it for experiments, let me know and i'll send it down to you.
  • All Those YesterdaysAll Those Yesterdays Posts: 2,723
    exhausted wrote:
    i put a tung sol 12AX7 and a JJ EL84 in tonight. also installed the bitmo duo tone/pull gain kit.

    had a chance to open it up with the new tubes and it's a nice little improvement. didn't get a chance to test run the tone/gain other than to verify it worked. seems like opening the tone is a gain boost in itself. i just wanted it to take a hair of harshness off.

    also have the 3-way gain switch kit but i'm not going to install it i've decided. i don't need more gain.

    if you or your buddy want it for experiments, let me know and i'll send it down to you.

    I'm in the "to much gain club" I run a 5751 in the pre-amp, and I have the stock input resistor.

    R8, R9 & C3, C4: This is where you can pull the flabbiness out of the low end. I now have these as follows; R8 = 1.5k R9 = 1k, C4 = 10 uF and C3 = 2.2 uF

    R5: this increase or decreases power tube distortion. Because of the input capacitor R1 change you get much more gain out of it. I have R5 dropped down to 47k

    C5: Due to the stuff noted above with the flabbiness, you loose some low end, but changing out C5 will fix that. I now have it at 1000 uF 35v (big mofo!).


    Thanks for the offer, I haven't touched mine sense the winter, It's still about perfect for me. Even with the Reverend and the P90's. It will sound good when it sits next to a 5E3 clone in a head version sitting on another 2x12 cabinet. I'm not a fan of over bright amps, and I'm not a big fan of 10" speakers, this is why I'd run it through a 2x12. Of course I won't have the money for this head until tax season.
    E. Lansing-98 Columbus-00,03,10 Detroit-00,03 (1&2),06, 14 Cleveland-03,06,10 Toledo-04, Grand Rapids-04,06 London-05, Toronto-05, Indianapolis 10, East Troy (1&2) 11, Chicago 13, Detroit 14

    https://www.facebook.com/aghostwritersapology/
  • exhaustedexhausted Posts: 6,638
    i haven't experiences any low end flub at all but it may be because i'm using a different cabinet, different style etc. i don't really turn up past 12 o'clock etc.

    in fact, i think it lacks a little low end presence. that and it's a little harsh when overdriven moderately to heavily but the new tubes really helped with that. and the pull gain seemed to help the low end a bit. the low end is really a function of the cabinet though. i can see how, with a 2x12, your experience would be totally different.
  • All Those YesterdaysAll Those Yesterdays Posts: 2,723
    exhausted wrote:
    i haven't experiences any low end flub at all but it may be because i'm using a different cabinet, different style etc. i don't really turn up past 12 o'clock etc.

    in fact, i think it lacks a little low end presence. that and it's a little harsh when overdriven moderately to heavily but the new tubes really helped with that. and the pull gain seemed to help the low end a bit. the low end is really a function of the cabinet though. i can see how, with a 2x12, your experience would be totally different.

    The flabbiness kicks in around 3 oclock or so. It happens not matter what it goes thru. Sometimes it sounds sort of cool, but I'd rather not have it then have it.

    I get good low end and a nice punch with my set up.
    E. Lansing-98 Columbus-00,03,10 Detroit-00,03 (1&2),06, 14 Cleveland-03,06,10 Toledo-04, Grand Rapids-04,06 London-05, Toronto-05, Indianapolis 10, East Troy (1&2) 11, Chicago 13, Detroit 14

    https://www.facebook.com/aghostwritersapology/
  • exhaustedexhausted Posts: 6,638
    ah, i have rarely touched 3-o'clock. i've tended to kick on the OCD.

    can't wait for my hammond OT to get here.
  • All Those YesterdaysAll Those Yesterdays Posts: 2,723
    exhausted wrote:
    ah, i have rarely touched 3-o'clock. i've tended to kick on the OCD.

    can't wait for my hammond OT to get here.

    I like when power tubes start to sag now and then. I too play through an OCD.

    That OT will open that up a ton. After that if you still need some bass, I'd strongly recommend changing out C5 to 1000 uF 35v. Unless the OCD gives you the bass you need?
    E. Lansing-98 Columbus-00,03,10 Detroit-00,03 (1&2),06, 14 Cleveland-03,06,10 Toledo-04, Grand Rapids-04,06 London-05, Toronto-05, Indianapolis 10, East Troy (1&2) 11, Chicago 13, Detroit 14

    https://www.facebook.com/aghostwritersapology/
  • exhaustedexhausted Posts: 6,638
    well, my OCD is pretty scooped (version 1) so it seems to match quite well. the OT swap is purported to really open up the low end. the recommendations i've seen have been, besides the tone control, do the OT first and then start tweaking resistors and caps if desired.
  • All Those YesterdaysAll Those Yesterdays Posts: 2,723
    exhausted wrote:
    well, my OCD is pretty scooped (version 1) so it seems to match quite well. the OT swap is purported to really open up the low end. the recommendations i've seen have been, besides the tone control, do the OT first and then start tweaking resistors and caps if desired.

    I totally agree to wait till after the OT is changed before making changes for sure. I'm not going to fine tune mine at all to the Reverend, keeping it set up for the Dano. The 5E3 and the Reverend will sound fantastic together for sure.

    I have the version 3 OCD, and that thing can get pretty bassy. I have to plead ignorance, I don't know the differences between the version. My buddy has a version 2, I have a version 3, and I don't think I hear a difference, then again I don't have that good of a ear.
    E. Lansing-98 Columbus-00,03,10 Detroit-00,03 (1&2),06, 14 Cleveland-03,06,10 Toledo-04, Grand Rapids-04,06 London-05, Toronto-05, Indianapolis 10, East Troy (1&2) 11, Chicago 13, Detroit 14

    https://www.facebook.com/aghostwritersapology/
  • exhaustedexhausted Posts: 6,638
    for what it's worth.

    http://www.fulltone.com/PDfFiles/OCD%20complete%20Mods_small.pdf
  • exhaustedexhausted Posts: 6,638
    just test drove the tone control at pull volume.

    good lord, with the pull boost engaged, it's a beast. well into "need the attenuator" territory. the tone control does indeed act like another gain control when you open it up.

    12 o'clock on the volume,tone about 1 o'clock with a strat is gorgeous. i wish i could capture the sound in the room with mics but i'm having trouble doing that.
Sign In or Register to comment.