Archon preamp tube layout chart?

Discussion in 'Amplifiers' started by rockridge98, Mar 16, 2015.

  1. rockridge98

    rockridge98 New Member

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    I like getting more use out of the gain knob in high-gain amps by putting a 5751 instead of a 12ax7 in the right position of the overdrive channel.
    I'd like to do this with my Archon 25 combo.
    Anybody have an Archon preamp tube layout chart or know which tube position this would be in the Archon?
     
  2. rising farce

    rising farce New Member

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    Here's the Archon 100 pre-tube layout, per PRS. I suspect the 25 is the same.
    V1 - Input
    V2 - Lead gain
    V3 - Lead gain
    V4 - Clean gain
    V5 - Phase inverter
    V6 - Effects loop (located closest to power tubes)
     
    vchizzle likes this.
  3. rockridge98

    rockridge98 New Member

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    Awesome, thanks!
    Stupid question, but V1 is the tube closest to the input jack, right?
     
  4. rising farce

    rising farce New Member

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    Correct.
     
  5. vchizzle

    vchizzle Birdman.

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    I don't understand why all tube amps don't come with a chart. Could be a simple 1/2 sheet of copy paper diagram. The kinda tricky one on this amp is V4 being the clean gain.
     
  6. WeFixFlats

    WeFixFlats Respect The Clave

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    You bring up a mega sore point here. And it's been discussed at length by the community over several posts and months with no satisfactory conclusion:

    PRS Support still doesn't have online manuals for either the Archon or the HXDA amps.
     
    #6 WeFixFlats, Mar 28, 2015
    Last edited: Mar 28, 2015
  7. Ben

    Ben New Member

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    Quick question. Are all the preamp tubes in the Archon 12ax7's?

    I'm not sure if the phase inverter, for example, should be a 12at7....
     
  8. LSchefman

    LSchefman Hears Tones

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    For some reason I recall my HXDA and DG amps coming with tube charts stickered to the inside of the head box.

    Edit: I just took a look at the back of the amps, and saw the tube chart for the HXDA peeking through the bottom. I know the DG30 has one as well, I just don't remember where they put it.

    Anyway, I'd be surprised if the Archon came without one.
     
    #8 LSchefman, Aug 15, 2017
    Last edited: Aug 15, 2017
  9. vchizzle

    vchizzle Birdman.

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    I'm 99% certain all are 12ax7 in the Archon.
     
  10. DreamTheaterRules

    DreamTheaterRules Archon owning member

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    Yeah, I felt silly making this same post a few weeks after I got my H, only to look inside the back and see the tube layout on the inside of the amp. When all else fails, take the back cover off and look! :)
     
  11. bodia

    bodia Authorities said.....best leave it.....unsolved

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    I don't think there is a chart inside the Archon. Seems to me there was a similar post about a year ago. Someone was looking for the layout and said there was no chart inside. Can't seem to find it now.
     
  12. LSchefman

    LSchefman Hears Tones

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    I think it would be a good idea if they had manuals, too, even very brief ones, like the one for the Grissom amps.

    Granted, most stuff is fairly self-explanatory if you know your way around amps, but there are helpful details that player's might like to know.
     
  13. Ben

    Ben New Member

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    I think you are right. The Archon preamp tubes are all 12ax7's. But I tried a long plate 12at7 for the phase inverter and really like the effect. The distortion is smoother than with the ECC83 that was in there. I like JJ ECC83's for all the other positions though....
     
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  14. shimmilou

    shimmilou New Member

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    My favorite PI tube, I use them in several amps. I also like a 5751 in V1 for many high gain amps.
     

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