Amp Build + Mods
Posted: Thu Jan 04, 2018 6:16 pm
Hi All,
A few weeks ago, I decided to build an amp with the help of an awesome guy named Rhys. note* 2 cameras are used in this process (Home + phone cam). I decided to make one here as I'm going to Japan. Rather have an amp made in nz for when I head there.
I started a thread for my own reference. feel free to comment. FIrst post is from 14-30 dec.
It will be based on Steve Luckey 5e3 but completely ditching the diagram but rather, read off the schematic as it could be made simpler.. + twin preamp later on.
Black board bought from Mable Audio. Turrets, sockets, fuse holder etc..Filter caps from USA.
Let's start:
Main turret:
Wiring strapped around turrets. allow to heat turrets for 20s before soldering. Do not move wiring otherwise it will cause dry joint. Note: Complete all flying leads before installing components.
3 pcs aluminium folded chassis etc. won't provide too many photos as I don't want to flood the page.
Mount componets: Filter caps installed later on the date
fit on chassis (will be taken off when output transformer arrives)
I have split the 12AY7 cathodes for the robrobinette "5E3 Lead channel mod"
at a later stage. It will also be easy to change this 1st stage into a fender twin pre-amp on V1
again at a later stage.
two more of robinette's Mods,
1 = Master Volume in place of R15 referring to Steve Luckey 5E3 schematic.
2 = 3 way switched feedback--normal/no cathode bypass/feedback. again referring
to the same drawings centered around V2-A pin 3--C5--R13.
Cathode Bias + LED PILOT LIGHT
Other changes done, C2 and C3 are .047uf. In the wires going to each 6V6 pin 4 are now 470 ohm 3 watt resistors.
A few weeks ago, I decided to build an amp with the help of an awesome guy named Rhys. note* 2 cameras are used in this process (Home + phone cam). I decided to make one here as I'm going to Japan. Rather have an amp made in nz for when I head there.
I started a thread for my own reference. feel free to comment. FIrst post is from 14-30 dec.
It will be based on Steve Luckey 5e3 but completely ditching the diagram but rather, read off the schematic as it could be made simpler.. + twin preamp later on.
Black board bought from Mable Audio. Turrets, sockets, fuse holder etc..Filter caps from USA.
Let's start:
Main turret:
Wiring strapped around turrets. allow to heat turrets for 20s before soldering. Do not move wiring otherwise it will cause dry joint. Note: Complete all flying leads before installing components.
3 pcs aluminium folded chassis etc. won't provide too many photos as I don't want to flood the page.
Mount componets: Filter caps installed later on the date
fit on chassis (will be taken off when output transformer arrives)
I have split the 12AY7 cathodes for the robrobinette "5E3 Lead channel mod"
at a later stage. It will also be easy to change this 1st stage into a fender twin pre-amp on V1
again at a later stage.
two more of robinette's Mods,
1 = Master Volume in place of R15 referring to Steve Luckey 5E3 schematic.
2 = 3 way switched feedback--normal/no cathode bypass/feedback. again referring
to the same drawings centered around V2-A pin 3--C5--R13.
Cathode Bias + LED PILOT LIGHT
Other changes done, C2 and C3 are .047uf. In the wires going to each 6V6 pin 4 are now 470 ohm 3 watt resistors.