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Thursday, May 28, 2015

Run Off Groove Ruby

Got a request for a headphone amp, "for those of us who hit their peak inspiration when everyone's asleep." Being guilty myself of waking up my 1 year old son with a Peavey Classic 50 with the volume only at 2, I thought this was an excellent idea. So here's ROG's Ruby–a 386-based amplifier that can easily fit in a 1590A, or even an Altoids tin. Check out the ROG article on the circuit for more info and a couple of mods.

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32 comments:

  1. UnknownAugust 6, 2015 at 4:55 PM

    http://imglink.ru/show-image.php?id=625caa1ba87a9248de36635b59c5e2c7 Verified!

    ReplyDelete
  2. BerkicauJanuary 30, 2016 at 10:50 AM

    What should I do with speaker + and -?
    Silly question though..

    ReplyDelete
  3. jordaoAlvesApril 10, 2016 at 5:04 PM

    which the power of the speaker ?

    ReplyDelete
  4. UnknownApril 16, 2016 at 6:47 AM

    How do you do those transfers with just contours (lower right in the image above)?

    ReplyDelete
  5. FlojdzikApril 8, 2017 at 5:30 AM

    So I can directly plug headphones to speaker connection without worry about headphones?

    ReplyDelete
  6. PabloApril 18, 2018 at 4:43 AM

    Hi! Is a good amp for the guitar? Is good for imput Analog pedals? 8om speaker is good? My english is too bad... I Hope you understand.
    You are the best electronic man!

    ReplyDelete
    Replies
    1. Effects LayoutsApril 18, 2018 at 12:31 PM

      Yes, you can run pedals into it and will work fine as a low wattage amp. Not sure about the speaker ohms, but 8 is probably fine.

      Delete
    2. PabloApril 19, 2018 at 1:11 AM

      Thanks.. Is valid the lm380? Or thE tda7052? Thanks again

      Delete
  7. UnknownMay 20, 2018 at 12:23 PM

    Can it be used for an electric bass?
    Thank you.
    Greetings from Chile

    ReplyDelete
  8. riccardoAugust 22, 2018 at 8:42 AM

    anyone tried with a speaker? any good result? i've tried with a 8 ohm and a 22ohm little crappy speakers, and there's almost no sound

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    Replies
    1. UnknownSeptember 15, 2018 at 10:33 AM

      its a 1watt amp..you should try 4ohms or 2ohms..maybe it would sound better..the smaller the resistance of a speaker the louder it gets..but also tends to distort a lot..

      Delete
  9. jordaoAlvesJanuary 25, 2019 at 10:33 PM

    I have 1000uf capacitors left over, I can put them in place of those being used in ruby ​​(100uf and 220uf)

    ReplyDelete
    Replies
    1. Effects LayoutsJanuary 29, 2019 at 9:47 AM

      You could for the 100uF, but I'd stick with the stock value for the 220uF cap.

      Delete
  10. UnknownApril 5, 2020 at 10:14 PM

    Verified! Works great.

    ReplyDelete
  11. iYungJuly 7, 2020 at 10:15 AM

    For volume pot, can use 20K value?

    ReplyDelete
    Replies
    1. Effects LayoutsJuly 7, 2020 at 10:36 AM

      You can try it, or solder a 20k resistor from lug 1 to lug 3 which will turn the reduce the pot's value to 10k.

      Delete
  12. Zaraki1337March 2, 2021 at 9:44 PM

    Is 220 for dc block?


    Whats the value that can be used for dc block?

    ReplyDelete
  13. rodrigosgJuly 14, 2021 at 8:43 PM

    only one earphone sounds, how do I make them both sound?

    ReplyDelete
    Replies
    1. gonsalomonJanuary 14, 2022 at 2:49 AM

      The Ruby is a mono amp: it only gives 1 output "channel", so to say. Try building a TDA2822 amp if you want a true stereo sound, or 2 Ruby amps so you get 2 channels.

      Delete
    2. rodrigosgNovember 7, 2022 at 5:52 PM

      I solved it with a stereo jack

      Delete
  14. David665January 7, 2022 at 9:01 AM

    If one were to put in an on/off switch, how would that be wired? Between the 9v and the ground?

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    Replies
    1. gonsalomonJanuary 14, 2022 at 2:47 AM

      Just cut the VCC line: solder the positive lug of your VCC to the switch, and the output of the switch to where VCC would be connected on the board. That way, when switching it off, it's simply not powered; then you switch it on and it has power.

      Delete
  15. gonsalomonJanuary 14, 2022 at 2:45 AM

    Can you use a J201 instead of the 2N5457? Got J201 on TO-92 package. Either way, got both J201 and 2N5457 on SOT-23 package, so it's not like I cannot use them. Just asking to see if a J201 can replace the 2N5457. TIA!

    ReplyDelete