hi,
I'm very new to this, the tube amp thing... as well as to this forum, .. and high voltages... I'm a guitarfxlayout guy, using vero board...
BUT I happen to have a radio... 🙂 and it works... and it is pretty well documented....
and it even has a "Q" input into which I could plug a pedal...
But I want more 🙂
want to learn beforehand... and I'd like to bring out more from this...
I'd like to strip off the amplifier part....
okay, first I want to use it... for a week or so...
then I'll try to strip it off...
first using pliers, or a solder iron, to cut off the rest of the circuit..
measuring perhaps voltage at certain points (B1+ B2+) in the new situation.... (I'm new to high voltage, so I'm psyching up, watching videos, reading, etc 🙂 )
and then...
rebuild it from scratch...
my question is what do you experienced guys / girls think of this?
I am learning.... and I can already say that I understand 80% of all stuff I read about simple tube amps...
But I'm miles away from committing designer decisions... if it will every happen... not very likely...
my plan is to keep the EZ80 rectifier so that the voltage would not rise even further regarding that it was designed for 220V, and now it is 230V that Europeans have in their wall sockets... and tube amp builders say that it is even more sometimes...
I'd not want to have a tone stack.. it will have a volume pot only...
two tubes and two transformers...
I attach the schematic with my "cut off plan".... and also my "rebuild" layout plan
for any suggestion I'll be grateful 🙂
Peter
I'm very new to this, the tube amp thing... as well as to this forum, .. and high voltages... I'm a guitarfxlayout guy, using vero board...
BUT I happen to have a radio... 🙂 and it works... and it is pretty well documented....
and it even has a "Q" input into which I could plug a pedal...
But I want more 🙂
want to learn beforehand... and I'd like to bring out more from this...
I'd like to strip off the amplifier part....
okay, first I want to use it... for a week or so...
then I'll try to strip it off...
first using pliers, or a solder iron, to cut off the rest of the circuit..
measuring perhaps voltage at certain points (B1+ B2+) in the new situation.... (I'm new to high voltage, so I'm psyching up, watching videos, reading, etc 🙂 )
and then...
rebuild it from scratch...
my question is what do you experienced guys / girls think of this?
I am learning.... and I can already say that I understand 80% of all stuff I read about simple tube amps...
But I'm miles away from committing designer decisions... if it will every happen... not very likely...
my plan is to keep the EZ80 rectifier so that the voltage would not rise even further regarding that it was designed for 220V, and now it is 230V that Europeans have in their wall sockets... and tube amp builders say that it is even more sometimes...
I'd not want to have a tone stack.. it will have a volume pot only...
two tubes and two transformers...
I attach the schematic with my "cut off plan".... and also my "rebuild" layout plan
for any suggestion I'll be grateful 🙂
Peter
Attachments
Are you using new resistors and capacitors? You'll need to check them all and definitely replace all electrolytic caps. Powering fewer tubes, watch your filament voltage doesn't go too high.
You won't likely have enough gain to use a guitar straight in. If more is needed have a look at fender schematics and maybe copy the first stage or two using a 12AX7.
S.
You won't likely have enough gain to use a guitar straight in. If more is needed have a look at fender schematics and maybe copy the first stage or two using a 12AX7.
S.
hi,
sure, new components...
I plan to plug in pedals... a tube screamer for example...
I'm aware that this preamp "takes" 1V signal...
but thanks for the suggestion, I'll study Fender amps with 12AX7!
I'm expecting the voltage grow withut the rst of the amp, but being a layman, I haven't thought of the filament voltage... thank you!
I'll measure what they get when I cut off the rest of the circuit....
maybe this part -- the filament voltage -- could be done using another power source...
and DC...
sure, new components...
I plan to plug in pedals... a tube screamer for example...
I'm aware that this preamp "takes" 1V signal...
but thanks for the suggestion, I'll study Fender amps with 12AX7!
I'm expecting the voltage grow withut the rst of the amp, but being a layman, I haven't thought of the filament voltage... thank you!
I'll measure what they get when I cut off the rest of the circuit....
maybe this part -- the filament voltage -- could be done using another power source...
and DC...