Official Egnater Tweaker 15 Tube Swapping Thread!

Discussion in 'The Squawk Box' started by ibanezcollector, Dec 29, 2012.

  1. Rustedcan

    Rustedcan Junior Member

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    Thanks Riffraff for that explanation, very instructive. I'll see if I can get some of these tubes on ebay.
    The TAD 7025S that i put in V1 is, as they say, a recreation of the old Mullard tubes, long plate, and that makes a huge difference compared to the stock tube, I think a NOS will work much better.
    Tell you if i find something and will ask if worth it.
    Have a nice day folks. And keep on rockin'.
     

  2. Riffraff12571

    Riffraff12571 Senior Member

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    I agree 100% on the TAD. Of all of the CP tubes I've tried the TAD 7025 premium was the best in V1. That's what I was running in V1 of mine before I started down the vintage tube rabbit hole.
     

  3. Rustedcan

    Rustedcan Junior Member

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    Hello!
    On my sunday tube search, i found these NOS tubes on a website, they have plenty of old tubes.
    Tungsram ECC83 made in Hungary in the late 70's, they say its sonically comparable to top NOS Mullard and Rca 69$ each.
    Of course Brimar ECC83/CV 492 made in England in 67, but 89$ each!!
    RFT ECC83 made in east Germany during the 60's, labeled Tesla, United Electron etc...
    General Electric 5751 5 star triple mica grey plates 49$ each
    Sylvania Jan 5751 made in the mid 70's 32$ each
    RCA 5751 black plates, they say "one of the best 5751 made" 59$ each
    And asian made 12ax7/Ecc83/5751:
    BEL/Trigon ECC83 made in india with Philips/Mullard tooling and engineering in the 1970's 37$ each
    Matsushita ECC83 Made in Japan with Philips/Mullard tooling and engineering in the 1970's also called "the japanese Mullard" 42$ each
    They also have : Toshiba-Philips/amperex-NEC etc....
    I think i'll find my happiness. I'm living in Europe so in ÔéČuro the price will be lower.
     

  4. laoded!

    laoded! Junior Member

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    Hey, got my T15 2 weeks ago and have been trying out some tubes. Actually, I like the stock Ruby 6v6's. But, I got this to be condo friendly JTM type amp. The Brit setting is really good, so I am looking for a tube that will nudge it in that direction. I've read about a lot of people saying the T15 can take a KT66 but have yet to hear about a success story running these... anyone? I have Tung Sol 5881's on the way. But would still like to try the KT66 too if indeed it won't ruin the tweaker. I have checked and I do have the more recent version with the 510ohm resistor.
     

  5. laoded!

    laoded! Junior Member

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    So I put the KT66 idea on the back burner until more information can be gathered. But I did get some RI Tung Sol 5881's and some RI Mullard 12AX7/ECC83's These replaced the Saratov 6p3s' that were a definite improvement on stock... but was still underwhelming? Maybe my expectations were too high after reading all the rave reviews of these tubes. Definitely, nice, but definitely seemed to too 6l6 for my wants. I put the Mullard 12AX7's in the preamp first, V1 and V3 with a an old sovtek 12AX7 in V3 with the Saratov's still in the power section. This was a jump in significant jump in gain and bass was much bigger but not as tight. Very nice tone, great mids and chimey highs. I then put the 5881's in and it was huge. Again, massive bass, but less tight thank saratov's. Not as big a jump, but a definite increase in gain. I put a NOS Mullard CV2024 (12AT7) in V1. Definite decrease in gain, but maintained the bass characteristics and fuller, "chimier" highs. Really like this combo... will be sticking with this for now. not a massive change outside of the bass, but it just sounds more like what I want.

    Just wanted to post findings since there was precious little info on the T15 and 5881's. Upvote from me!
     
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  6. Rustedcan

    Rustedcan Junior Member

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    I just order some NOS tubes:
    For V1 a Matsushita ECC83 made in Japan in the 70's (Thx RiffRaff)
    For V2 a General Electric 5 star 5751 triple mica made in the early 60's (thx again RiffRaff)
    For V3 a NEC 12ax7 made in Japan for Western Electric (a suggestion from the seller)
    For the power section a couple of 6V6GT made for Brimar G.B by reflektor in the 70's
    I would leave a report as soon as i've put these babies in the tweaker!
    Stay tuned :jam:
     

  7. Rustedcan

    Rustedcan Junior Member

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    So the tubes are in the tweaker since yesterday.
    It's an other world compare to the stock tubes, the sound is much much better, highs, middle and bass everything is in place, you can clearly hear every note. Before i felt like there was a veil over the sound of the amp.
    Before the NOS tubes i upgraded the tweaker with high grade actual tubes, as said above in a comment, it was already better than the stock tubes, now the difference between NOS and highgrade actual tubes is not extraordinary but you can hear it.
    You have to think that the lifetime of NOS is longer than actual tubes, so the investment is worth it.
    Better sound longer lifetime, go for NOS tubes, that's my opinion.
     

  8. Riffraff12571

    Riffraff12571 Senior Member

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    The cool thing is you can actually her a difference from brand to brand too. Sometimes the difference is HUGE. Especially in amps with very few preamp tubes. Have fun with it.
     

  9. Riffraff12571

    Riffraff12571 Senior Member

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    A little OT but..
    I picked up a couple of cabs for use with my small amps on craigslist last week.

    [​IMG]

    The G10D25 speakers that came in these are horrible but the cabs are all ply and really nice so out with the old and....

    [​IMG]

    in with the older. '75 10" CTS alnicos.

    [​IMG]

    1x10 cabs are not the best application for these but they are still a HUGE improvement.

    [​IMG]
     
    Last edited: Dec 13, 2017

  10. dkal24

    dkal24 Member

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    Well I read this whole thread and decided to buy some JJ 6v6S tubes for my Tweaker. I have quite a few preamp tubes already. I'm also interested in the Russian 6P3S tubes. Somewhere down the road I'll try these.

    I did try some Sylvania 6L6GC valves I had but I'm not sold on these. The originals are Ruby 6V6GT's. What tubes are you guys still using in your Tweakers?

    This thread's a little old so I'm going to start a new one.
     
    Last edited: Mar 12, 2018

  11. scrumm21

    scrumm21 Silver Supporter

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    Saratov 6P3S still powering mine.

    I hadn't played my Egnater for about 6+ weeks (Marshall been getting all the love ) But I cranked up the Tweaker yesterday afternoon.... took the clean setting to edge of breakup and then dialed in the vintage Rat. Almost forgot how good it sounded..:D

    V1 - '61 RCA 5751
    V2 - Stock tube
    V3 - JJ ECC 803S
    V4 - 70's 6P3S
    V5 - " "
     

  12. dkal24

    dkal24 Member

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    I love the old Rat pedals. I bought mine back in 85 and used it ever since.
     
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  13. Rustedcan

    Rustedcan Junior Member

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    Hello dkal24,
    Since i've changed the stock tubes in the tweaker, i'm very happy with the sound, always wondering how a so affordable amp can be so good.
    V1 Ecc83 matsushita Nos from the 70's
    V2 GE 5 stars 5751 Nos from the late 60's
    V3 12ax7 Nec made in Japan in the 70's
    and 2 6V6GT made in russia in the 70's for Brimar a western re-seller compagny
    I got these 6V6 for 25$ the matched pair!
     
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  14. cvt01

    cvt01 Junior Member

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    Hi all! New to the thread. I just replaced the stock power tubes to some cheap (well relatively) Sino EL34-B's from tube depot.
    I had a real hard time removing the stock ones and even harder time to put in the new ones. The feet of the tubes were such a tight fit and as this is the first time I opened up a tube amplifier I had no clue how much yanking and pushing these tubes take before giving in.
    Happy to report that these rather tall tubes fit under the grill with about 4mm (0.15") clearance when pushed all the way in. I was even able to reinstall the top grill.

    I don't know if it made a huge deal of difference compared to the stock ones though. I'm still new to this so I'm not sure how much can be expected or I just can't hear it. I noticed a hum coming from the amp which I think was not there before though LOL...

    Took a picture for reference to show the tight fit. As you may notice I had to remove the sheet metal rings because they just got in the way of putting the tubes in through the top cavity. It is such a tight fit that there is no way they ever going to become loose without that stupid ring.

     
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  15. scrumm21

    scrumm21 Silver Supporter

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    Welcome cvt01 !!
    Pre-Amp tube swap would be more likely to give you an audio difference that you can notice ( other than volume) .
    Power tubes - not as much ( if any )

    I have a 60's era 5751 in V1 ..... a great tube for V1 in the Egnaters imo.
    60's 12ax7 in V2
    and a new Sovtek 12ax7 LPS tube in V3 ( the Phase Inverter )

    The Egnater is a great amp to play with and swap tubes.
     

  16. cvt01

    cvt01 Junior Member

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    It was a noob attempt to get closer to the Marshall sound by getting the same tubes as most Marshall's have. Admittedly I don't know enough but I like to fiddle with this kind of stuff. I'm not willing to spend big bucks on tubes though so for 30 bucks this was a nice experiment.
     

  17. scrumm21

    scrumm21 Silver Supporter

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    You do Not have to spend "Big bucks" to upgrade your pre-amp tubes.
    New production Tungsol 12ax7 works Great in V1 - $15.......
    Sovetek 12ax7 LPS for V3 (Phase Inverter) - $14
    These two swaps will prob give you the most noticeable diff ( improvement ) in your "sound"
     

  18. cvt01

    cvt01 Junior Member

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    Looking at the new production tungsol these are added options:
    Balanced Triodes (add $2.00 each)
    High Gain (add $2.00 each)
    Low Noise & Microphonics (add $4.00 each)

    What are these? :) High gain I assume breaks up earlier (?) but what is balanced triodes?
     

  19. scrumm21

    scrumm21 Silver Supporter

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    good questions...

    Low Noise\Microphonics - I have bought 10+ new production preamp tubes - (think I opted for this only 1 time). Have not had any issues. ( Tung-Sol \ Sovtek \ EH \ Mullard \ JJ )
    (Really haven't had any issues with the '60s era tubes I have bought either)

    High Gain - Never paid for this option either.

    Balanced Triodes - "" Balanced: When the plate current draw of each triode is the same, we refer to that as having balanced triodes
    Apparently HI-Fi systems benefit the most from Balanced 12ax7's.
    Guitar Amps - much debate over that.
    Many prefer an Unbalanced tube for the Phase Inverter
    Many People prefer Balanced (I have used \ am using both - hard for these older ears to hear any significant difference )
     

  20. cvt01

    cvt01 Junior Member

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    Thanks, very helpful!

    Just ordered a Tung-Sol 12AX7 and a Sovtek 12AX7LPS. I should record the sound with the stock ones to be able to compare the sound before and after the switch.
     
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