• 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.

Point to point wiring

Not beautifully photographed, but also sounds good;-)


  • IMG_20180212_183836[1].jpg
    339.6 KB · Views: 112
  • Like
Reactions: 1 user
Do not end all parts in one fat solder point. Do use solder tags to fix one part and use this as feeder: set the solder points as close as possible at the "real" parts; we do hear every millimeter and every unnecessary diameter of wire, lead, tag...
For ground use a wire and set the solders joints side by side without bold overlapping solder pads.
  • Like
Reactions: 1 users
All parts have parasitic C, parasitic L, and parasitic R, no matter how large or how insignificant the parasitic is, relative to the part's intended/specified value.
Some parasitics are at the outer layer of the Onion, and others are at the core of the Onion.

Peel the outer layers off of the Onion before attacking the inner layers.

Just my opinion.

A customer of mine had a 6 foot tall large diameter massive ground return, and he was getting 100 Volts across the bottom 12 inches (from ground to 1 foot up the 6 foot return).
I knew he had several amps of very fast rise signal being returned to ground through the 6 foot massive "ground return".
"Grounds are Commonly Misunderstood" (both true, and an intended pun).

Have Fun!
Happy New Year!
Last edited:
  • Like
Reactions: 1 users
The best example: never use these screwed solder lugs. This gives away a lot of cleanliness, resolution and homogeneity. And with RCA, use only ONE channel to connect the ground. When using both channels, you have sound worsening larger cross-cuts, more undefined transitions, small hum loops, so not One circuit, and more.
Also, it looks like all the grounds are connected to this cabinet. Should it be so, then it is simply botched - and the result sonic garbage)-;


  • opal-line-stage-preamplifier-2-wyetech-labs.jpg
    285.8 KB · Views: 41