Artec - Radix Rx5 Portable / Practice Amp
Posted: 30 Jul 2011, 23:45
Hi,
I've recently come into possesion of one of these:
http://www.artecsound.com/amps/rx-5.htm
(Mine's a black one)
Single sided, mixed SMT and through hole.
"Power" amp is a TEA2025L, 2 channels bridged 4.6W (!) into 8 ohm.
HCF4060 with a XTal for 440Hz tone generation.
TL062 for "preamp" section.
Weakest point is the speaker, of course. But for those late night playing or some weekend/part semi accoustic jamming, it sounds really good. Some nice soft overdrive tones, not so good at higher gain settings ("rock" and "metal" amp. mode)
I still couldn't figure how the "amp selection" works, seems nice to implement as a 5 mode amp simulator pedal. I was probing around with the DMM in continuity check mode but run out of patiente, must come back to this. I searched online for a similar rotary switch but couldn't find it. However, I started (painfully, slowly) to trace it; as SMD cap values are _not_ printed it seems like it would be a half-waste of time, but at least I'll try to figure out the circuit topology (in particular the amp selection).
Pictures attached. As it seems it will remain dismantle a couple days, if is there some interest in this and you need some close up or more pictures, just ask.
Best regards,
Juanro
I've recently come into possesion of one of these:
http://www.artecsound.com/amps/rx-5.htm
(Mine's a black one)
Single sided, mixed SMT and through hole.
"Power" amp is a TEA2025L, 2 channels bridged 4.6W (!) into 8 ohm.
HCF4060 with a XTal for 440Hz tone generation.
TL062 for "preamp" section.
Weakest point is the speaker, of course. But for those late night playing or some weekend/part semi accoustic jamming, it sounds really good. Some nice soft overdrive tones, not so good at higher gain settings ("rock" and "metal" amp. mode)
I still couldn't figure how the "amp selection" works, seems nice to implement as a 5 mode amp simulator pedal. I was probing around with the DMM in continuity check mode but run out of patiente, must come back to this. I searched online for a similar rotary switch but couldn't find it. However, I started (painfully, slowly) to trace it; as SMD cap values are _not_ printed it seems like it would be a half-waste of time, but at least I'll try to figure out the circuit topology (in particular the amp selection).
Pictures attached. As it seems it will remain dismantle a couple days, if is there some interest in this and you need some close up or more pictures, just ask.
Best regards,
Juanro