I am beginning to put together a Marshall 1974x, better known as the Marshall 18W amp. This all tube powered amp will be built in a head cabinet that can be hooked up to an external speaker cabinet of choice. This 1974x circuit won’t be stock though, I am using the 1974x circuit as a platform to try a few modifications and circuit tweaks/ideas. The end goal of the build is to have a low power Marshall JTM/JMP/Plexi type amp. Lots of big fat clear clean tones and sweet harmonic distortion.
The chassis, eyelet board, power transformer, output transformer, faceplate and head cabinet are coming from the good folks at Trinity Amps. The rest of the parts I am sourcing myself.
- 1W carbon film resistors for the signal path
- SoZo capacitors (mustard cap work a likes)
- NOS BC/Vishay electrolytic capacitors
- PEC 2W potentiometers
- Cliff jacks
- NOS American made noval sockets and Belton octal sockets
- 22 AWG PTFE Teflon wire, 20 AWG PVC wire and teflon co-axial cable
- Mountain switches
- Trinity Amps designed Heyboer made power and output transformer
- Hammond choke
- NOS vacuum tubes
Most of the passive components can be seen on the turret board:
The following gallery contains pictures of the build in various stages.
Normal Channel: Clean
TMB Channel: Clean
TMB Channel: Dirty
Normal Channel: Dirty