• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Tube Op Amp Building Blocks

TubeLab SimpleSE Buildup begins

Started getting the parts together for my first buildup. The Tubelab SimpleSE seems like a reasonable place to begin. It's been years since my last tube adventure - an old HW-100 ham rig (not a typo - it was the forerunner to the much more famous HW-101, but you'd be hard pressed to tell them apart).

I'm really in awe at the amps that I've seen in this forum - you guys certainly set a high standard for excellence!

I'll give fair warning before plugging the box in the first time :) I wouldn't want anybody startled by a sudden flash over the horizon...


  • Nike_Op_Amp.gif
    47.2 KB · Views: 215
  • Gun Director Op Amp 1942.GIF
    Gun Director Op Amp 1942.GIF
    28.5 KB · Views: 203
    27.2 KB · Views: 202
  • my_favorite_programming_language_is_solder_pease.jpg
    22 KB · Views: 200
Last edited:
Thanks, SY. For now, it's a straight SimpleSE buildup with the only change being that I will use two preamp tubes - one for each channel. The idea is to build a "test bed" for further experimentation, possibly using the (at present) unused triode in each preamp tube in later modifications.

The GIFs I posted were originally part of an April Fool thread - but the fool is me, it turns out... Been a long winter, I lost a month someplace (it's only March 1 today :))

Still... it's another option to play with later!

And dang - now I gotta come up with a different April 1 thread!
Sweet, Ketje! And SOOO much easier to read than the gifs I posted! :)

So very much cooler (or hotter!) than a puny little LM-741. :cool:

(Mods - I hope this isn't too "off-topic" for the forum. My rationalization would be "Hey, it's an amplifier and with suitable feedback would indeed function as an audio amp. Not that it would be a good idea to do one this way - but it's another glimpse into the world of Tube amplifiers.

Hope you guys don't mind.

RF Dude )