Valve Jr Recycled Amps
The Valve Jr. modifications are a little more than tweaking the existing circuitry. Typically the only components that remain are the cabinet, the chassis and in some instances the power transformer.
Currently I build three versions using the recycled Valve Jr. components.
- A single ended version that produces 3-10 watts depending on the output tube (EL84 6BM8, 6V6, EL34)
- A push-pull output section version using a pair of 6BM8 tubes producing 3-10 watts.
- A push-pull output section using a pair of EL84 output tubes producing 7-18 watts.
All three versions share similar preamp topology. Simple is the key word here with a gain control, a single tone control and a master volume control. All have a pentode/triode switch that changes the power output from low to high. The amps can also be fitted with a variable power control circuit that permits fully adjustable power level from 2-max watts with a front panel control(this replaces the pentode/triode functionality). I modify both the head and combo versions. I fit a 10” speaker into the combo version. This makes for a highly portable and loud little amp.
Valve Jr Modifications
Valve Jr Recycled Amps
The Valve Jr. modifications are a little more than tweaking the existing circuitry. Typically the only components that remain are the cabinet, the chassis and in some instances the power transformer.
Currently I build three versions using the recycled Valve Jr. components.
All three versions share similar preamp topology. Simple is the key word here with a gain control, a single tone control and a master volume control. All have a pentode/triode switch that changes the power output from low to high. The amps can also be fitted with a variable power control circuit that permits fully adjustable power level from 2-max watts with a front panel control(this replaces the pentode/triode functionality). I modify both the head and combo versions. I fit a 10” speaker into the combo version. This makes for a highly portable and loud little amp.