(Prototype) JTM45 R/T Series II with Tube Buffered Serial Effects Loop

Discussion in 'Other Amps' started by Michael RT, Jun 20, 2020.

  1. Michael RT

    Michael RT Well-Known Member VIP Member

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    (Prototype) JTM45 Small Box R/T Series II with Tube Buffered Serial Effects Loop.
    It features the R/T mod on a (on/off) volume 2 pull out and a transparent and low noise tube buffered loop in series.
    This amp was built from the ground up by me with Classic Tone transformers.
    I biased up a set of Gold Lion KT66's for this one. I also installed a new custom MV mod in this amp head and two 3 way switches on the back of the amp as well.
    One is (tone stack) switch and the other is a V2a cathode switch.
    Great for fine tuning many different types of guitar tones.
    Give me a little feedback, let me know what you think of the demo video.
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    Last edited: Jun 28, 2020
  2. pedecamp

    pedecamp Well-Known Member

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    Sounds great Mike, its got that signature RT growl :yesway:

    Can you get a lead volume boost out of the loop with a boost pedal, also is the loop buffered so you dont hear the click of unbuffered pedals on and off?
     
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  3. Michael RT

    Michael RT Well-Known Member VIP Member

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    Thank you and also thank you for the questions. :cheers:
    Yes you can get a lead volume boost out of the loop with a boost pedal.
    The effects loop is tube buffered in series which is 10x better IMHO than all the solid state loops out there.
    The solid state effect loops work okay in those amps with these fuzzy harsh diode clipping mods.
    All the pedals I've tried I have not heard the click of pedals on and off.
    After testing every type of effects loop out there, this tube buffered serial effects loop is by far the best transparent and low noise loop for my style tube driven amps.
     
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  4. Michael RT

    Michael RT Well-Known Member VIP Member

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  5. Kelia

    Kelia Well-Known Member

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    Sounds great!
     
    Last edited: Jun 22, 2020
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  6. Buzzard

    Buzzard Well-Known Member

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    Keep in mind that this amp is a jtm 45 and is a little different than his other plexi amp mods that are based off the 68' superleads and marshall majors.I can vouch that those sound STELLAR.
     
  7. Michael RT

    Michael RT Well-Known Member VIP Member

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    Thank you so much for checking out my new amp design Guys, I greatly appreciate the feedback on it. :cheers:

    I'm not too sure the RT logo on the front of the amp is working out for me. :)
    Maybe it should be optional?
     
  8. Nik Henville

    Nik Henville Well-Known Member Premium Member

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    Damn but that sounds nice...
    I'd like to be in the room with it (rather than YouTube compression over cans...)
    Cleans up well with the guitar volume and has a great sound when pushed hard.

    :hippie::pirate::uk:
     
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  9. Buzzard

    Buzzard Well-Known Member

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    Sorry but the logo looks like cheap craft store stickers. Just being honest.
     
  10. Kelia

    Kelia Well-Known Member

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    Ok here it goes !

    Yesterday I posted about giving my opinion and asking you first if you
    wanted to hear it but this morning I decided to delete my post thinking it's not of my
    business ,...but since @Buzzard gave a very honest opinion and is bang on on what I wanted
    to say yesterday ,.now I think I need to say what I see ,..hear and think !

    Fisrt of all Michael,..........your amp sounds awesome and seems to be very organic sounding even if components are new , things should sound even better once they start cooking a bit .

    My honest opinion is that if a proud builder sells a product ,...the buyer wants to be proud owning it
    and for me ,....the weakest side of this particular amp is cosmetic ,. every small detail counts ,
    like having the *Looks* with a nice logo and nice knobs and also having all switches aligned perfectly with
    each other like if they were on the same line .
    I saw an amp for sale here that had some nice transparent stickers with markings on
    and it looked clean but don't know where you could get those instead
    of the different sized letters you installed .

    [​IMG]

    I think the tube effect loop is great but I'm not sure If I'd like to have my tube on the left side cramped
    against the wooden box and maybe hit it when you pull your chassis out to bias or put it back in,....I think a bigger chassis with the tube mounted on top would be better imo ,....also, when I buy a PLexi
    style amp ,.I want my head box to be spot on ,....cut,..shape ..radius..legs etc.. to an original ,...this is my personnal taste and important for me.

    [​IMG]

    I saw that you posted this amp before the loop was installed on another forum and I saw on the picture that there is electrical marettes inside and I never seen this but an amp is not a light fixture that stays still ...and with all the vibration from the cab ,...I'd be afraid for them to loosen up and cause failure but again I'm no tech but it's not something I want to see in my amp,.....but again ,I may be completely wrong on this subject and hope someone chimes in.

    [​IMG]

    I 'm a house builder and designer and studied in Graphics so I'm good with drawings
    and I just sketched a few ideas that are not really centered but will give you an Idea on what can be
    done with a name logo to add looks and professionalism to your amp building business.
    Only trowed in two different ways how the letters could look but creative design can make me go for days
    and get a whole page of ideas,..... but I think you'll get the picture.
    I had a friend who was building amps and was a great amp builder and his logo was three letters
    that looked like the Flinstone letters so I drew him an awesome classy logo but he became a plane pilot instead
    and doesn't build anymore so he never used what I draw for him ,....I even drew him a Van Halen amp style headbox that would look awesome if it was built for real.

    That's it for me ,.....hope I didn't cause any problems,....just trying to help in a positive way.

    Cheers Michael !

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    [​IMG]
     
    Last edited: Jun 22, 2020
  11. Michael RT

    Michael RT Well-Known Member VIP Member

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    Thank you for the kind words, I greatly appreciate it.
     
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  12. Michael RT

    Michael RT Well-Known Member VIP Member

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    I appreciate your honesty, thank you.
     
  13. Michael RT

    Michael RT Well-Known Member VIP Member

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    I appreciate all the feed back, thank you.
    I also like your logo ideas.
    I should have mentioned it before (sorry)
    This is a prototype and not the finished product.
    If this prototype sells, then I will look into better graphic designs and marking.
    I'm keeping the prototype cost low because of this.
     
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  14. Buzzard

    Buzzard Well-Known Member

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    I don’t begin to know anything about how much it costs to produce logos but what about the same material as the metal panels? Ie brushed aluminum look? But the old rectangular style like Friedman’s and engrave you’re logo into it? I think that would class it up a lot. Idk.
     
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  15. Michael RT

    Michael RT Well-Known Member VIP Member

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    Yeah, I totally agree with you.
    I have a rectangular shaped gold plate that I might have engraved with cool looking R/T logo.
    I'm kinda waiting right now.
    I want to see if people are interested in my amp circuits and the way they sound first before going all out.
    I am going to look into the cost of a decent looking logo and get a few prototypes made in the meantime.
     
  16. Buzzard

    Buzzard Well-Known Member

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    I’ll tell you what. Judging from what guys REALLY seem to want ...on the forums at least, is a reissue internally and cosmetically of the late 70’s jmp master volume 2203/4 . Sour mash makes the head cabs. Get some rocker switches and boom I think they’ll sell.
     
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  17. Michael RT

    Michael RT Well-Known Member VIP Member

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    You might be right but as a result the cost will soar and make it very difficult for customers to afford.
    I'd like to keep the cost under $2000 dollars.
    Most companies are selling amps like this for $3000 to $4000 dollars and they don't even sound as good as my amp heads. :)
    These are just prototypes that are just testing the waters.
    There's no point spending tons of money on cosmetics right now.
    Maybe down the road if things pan out.
     
  18. Buzzard

    Buzzard Well-Known Member

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    Check out the new bray coco 50.Not a jtm45 style but handwired brown sound style amp.Similar price point.
     
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  19. Dogs of Doom

    Dogs of Doom Moderator Staff Member

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    here's an idea for the emblem...

    rt.png

    Just do an embossed plastic, like Marshall uses...
     
  20. Mitchell Pearrow

    Mitchell Pearrow Well-Known Member

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    That is just fantastic !!
    Between you and David ( NR)
    You guys are doing some great work.
    And your playing is spotless.
    Thanks for posting Michael..
    Cheers
    Mitch
     
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