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Frog Pedals Alembic F2b Build

UPDATE: the capacitor I was waiting to finally arrived thank goodness!

So I put the capacitor and the tube in today. The tube ended up being surprisingly painless. What’s good is that they’re symmetrical.

I plugged it in and unbelievably, it worked first time!!! It sounds very nice. What I’m struggling with a little bit is that I seem to get the warm valvey tone at a certain level, but at that level I can’t slap, so I have to turn the drive down a bit. I’m not sure if that’s fixable to be honest.

last few parts of the plan then:

  • get it in the enclosure so I’m not at risk of electrocuting myself all the time
  • Add on/off switch on the power connector
  • Put in the clipping diodes and relevant switch
  • Get the other two switches working
  • Install stomp switch (not 100% sure on this, but I think being able to bypass the pedal would be sensible)
  • Install volume potentiometer
  • Add some LEDs...this I’m not sure how to do
 
@DirtyDuke have you compared it to the AMT Brick A-Bass?

Sorry no I haven't. I did compare it to the rocknglass bass pre and the John k 2fb(not sure if that's the correct name)

It stands up to every fender/alembic style ivd tried it against. No foot switch is an minor inconvenience, but the new version fixes that. Where it excels is you can use 2 different types of tubes,it has the mid switch, some dirt and its super cool looking.....
 
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After having had a really stupid issue (soldered the audio connections the wrong way around!) the pedal is up and running. Couple of rough images below.

Still to do:

  • add an on/off power switch
  • add a stomp switch (waiting for little PCBs to arrive)
  • add volume pot (waiting for the above)
  • change the clipping LEDs to red as Mark from Frogpedals says, "they may have a higher or lower reverse voltage and may clip sooner or later" so I believe they have a better tone than the white ones I've put in
  • install the switches and the stop switch, with LEDs, into the enclosure
  • sort the enclosure out!
IMG_3706.JPEG IMG_3707.JPEG

I played a few riffs with it yesterday. Audio quality and playing is bad, apologies. There are also some kids running around outside to make it worse! It's got some nice warmth to the tone that maybe isn't conveyed by the recording.

"
 
So are you using it as an amplifier or pre-amp entering the combo? Looks great!

I'm going to rebuild mine soon and a larger enclosure is at the top of my list.

What does the transformer do?

Sorry, ended up quoting myself as I couldn't edit my previous post. The transformer must bring down the voltage of course.

Can I get a close up of the front and back panels? I'd love to see all the detail for my own project.
 
IMG_5192.JPG
So are you using it as an amplifier or pre-amp entering the combo? Looks great!

I'm going to rebuild mine soon and a larger enclosure is at the top of my list.

What does the transformer do?
I'm using it as a pre-amp. Just bypassing the Peavey's pre-amp and feeding it straight into the power section of the TNT 150.

The transformer? You mean the little power supply, I guess. It a standard 110/220V power supply with a 9V output. This way I can feed 110/220V in from any power socket.
 
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