How about a Reverb?

[KerryF]

^-Will definately do tomarrow.

*Also, the Mix pot should have lug 1 connected to Reverb In.

[KerryF]

Very sorry about the wait guys...  Heres the internal pictures of the reverb tank:



I bought the tubes today.  The Sovetek Fender 12AX7s.  I am going to order some tube sockets tomarrow.  Tell me if these are good sockets to order for it: http://thetubestore.com/so-9pinf.html .  It has the socket, and then a shield that you can put on if you want.  Dont know if I would use the shield or not, but it comes with it.

[KerryF]

And then the tubes:

Sovtek Fender 12AX7 Vacuum Tube:

[ildar]

Ok so I just plugged this Reverb tank into a little Op Amp gain circuit to drive it.  It works!  But that was only to test to make sure the tank actually works.  Heres a schematic me and someone else (he helped me ALOT with it!) came up with.  Tell me what you think of it:



*Those three 22uF caps coming off the tube Cathodes...  They actually go in parallel with the resistors there.

Tell me what you think please!

If omitting the tonestack, would you need that last 1/2 gain stage? Looking at the schem, I'm wondering if anything after the 1st full gain stage is needed, that is, if omitting the tonestack.

[KerryF]

^-The second 2 half tube gain stages arent needed at all if the tonestack is left out.  You probably can leave the tonestack there though.  I just put it there so that I am able to get a nice tubelike overdrive, a tube reverb, and a nice Fender Tonestack.  Sounds like a whole Fender Tube Head in a box to me  .  I have an updated schematic with everything fixed:

[ildar]

^-The second 2 half tube gain stages arent needed at all if the tonestack is left out.  You probably can leave the tonestack there though.  I just put it there so that I am able to get a nice tubelike overdrive, a tube reverb, and a nice Fender Tonestack.  Sounds like a whole Fender Tube Head in a box to me  .  I have an updated schematic with everything fixed:

I had a hunch that might have been what you were going after. I definitely don't need/want any od coming out of my 'verb, so the second gain stage is unnecessary for me. Incidentally, what value did you use for the mix pot?
A thought-if I chose to go with the tonestack, It could be sandwiched between the 1st and 2nd half of the 1st gain stage, no?
Hmm...maybe a JFET version...

[KerryF]

^-Yea, I would use a 100k pot for the Mix.  The tone stack could definately be put between the first tube.  A JFET version may be pretty cool.  Maybe change the tonestack to something different though for that, or just use a tone control.  I also ordered some JJ ECC83s to try in the sockets I ordered.  May get a little more crunch out of those...?

[ildar]

^-Yea, I would use a 100k pot for the Mix.  The tone stack could definately be put between the first tube.  A JFET version may be pretty cool.  Maybe change the tonestack to something different though for that, or just use a tone control.  I also ordered some JJ ECC83s to try in the sockets I ordered.  May get a little more crunch out of those...?

AFAIK, ECC83 and 12ax7 are the same tubes, may not get more crunch out of them.
How much drive do you figure you're getting from the 386? If it produces any kind of distortion, a fixed resistor (2k7 + -) would be the ticket for my purposes.

[KerryF]

Well I know its basically the same tube, but different name.  But, the 12AX7s I got are Fenders so are a more clean tube.  I think the JJs may be a little more British/Crunch-like.  Well im not quite sure about the gain from the LM386.  Thats actually pretty much the ROG Ruby used for a boost/input buffer.  I used a little LM386 booster circuit to test out the reverb tank and it drove it pretty well.  It just didnt have anything else to give it more volume.  I am going to try to start the buffer/boost part right now.

[KerryF]

Ok, finished perfing the first section of this pedal (I am basicially doing little sections to make it a little more easy to follow).  This is the Input Buffer/Boost section which is essentially a JFET buffer and an Op Amp boost.  Heres some pictures:

[KerryF]

So I just tested out the Transistor Input Buffer and Op Amp Boost section of the pedal.  It works great.  Its gonna sound amazing once the tubes are added!  Then I hooked up the reverb tank after the Input Buffer and Booster.  It boosted it pretty nice.  The tank definately works correctly.  The reverb is way to strong right now though because theres no Mix pot, or Dwell pot, or anything besides the First Section's Gain pot.  So far so good on this design.  I will make a box layout in a second to show how the box with be layed out.

[KerryF]

Ok new pictures.  I recieved the tube sockets and shields, and the extra JJ ECC83 tubes today.  I also started working on the third stage of the pedal which is the full tube gain stage.  I have it almost done on perf, but I am tired and I will finish and add pictures tomarrow for it.  Heres some pictures of the tubes and sockets:





Tell me what you think.

Kerry

[KerryF]

Ok, question...  For the power supply, can I just use a 12v radioshack adaptor into a DC jack?  Or do I have to use something like a wall wart?  I dont know exactly what a wall wart is so can someone explain what it is and answer my questions?

Thanks

[KerryF]

Ok, Full Tube Gain Stage finished.  Heres some pictures of it with its crazy mess of wiring, and some pictures of it with Input Buffer->Op Amp Boost->Reverb Tank->Full Tube Gain Stage.

[petemoore]

  You have plenty of wire length, I'm not sure how many of the longer ones would be carrying SP, and whatelse, you may want to shorten some of them?
  You have alot going on after the Reverb springs, perhaps adding some adjustable *voicing pre-spring driver?
  *Reducing bass content into the driver, perhaps even a touch of high end filtering, for more of a HF, or midhumped frequency content to feed the driver/spring might be a nice touch.

[KerryF]

Well, here I dont get any Radio Signals or Interference so im not worried about that.

And I have a tonestack near the end to adjust frequencies, so thats good, but I may do what you say and add a Hi-Pass Filter.