tda2030->tda2050->lm3875
Postat: 19 december 2007, 11:20:42
hej.
är ny här och har en fråga.
har tidigare uppgraderat en gitarrförstärkare enl den här texten med
lyckat resultat.
tda2050-->lm3875 :
56 Watt conversion
Unscrew the TDA2050 from the heat sink. You may want to consider adding a fan or using a bigger heat sink although under most conditions the stock heat sink will work. Unsolder the leads of the ribbon connector at the small pcb. Remove the cap from the pcb to reuse with the new LM3875. The wires of the ribbon connector are labeled. Connect them to the LM3875 as follows:
A/W to pin 8 (Vin -)
B/W to pin 7 (Vin +)
C/W to pin 4 (V-)
D/W to pin 1 (V+)
E/W to pin 3 (output)
Reconnect the cap to pins 4 and 1. Observe polarity. Or use a 1uf to 10 .uf 100v electrolytic cap between pins 4 (-) and 1 (+) if the old one cant be used
min fråga:
har nu en gitarrstärk samma märke fast med en tda2030 istället.
kan jag gå till väga på samma sätt med denna konvertering som på
den gällande tda2050 ?
jag läste det här på ett annat ställe :
The power chip upgrade was a straightforward job, as the TDA2030 and TDA2050 chips are virtually identical. I ought to read through both spec sheets more carefully to see if I need to change the resistance and capacitors in the power amp circuit to better bias the mess, but at the moment, I'm feeling lazy, and I don't really relish the idea of tracing a PCB circuit without a schematic. I also clamped on an extra piece of heatsink metal, just for good measure.
tacksam om någon kunnig vill ge synpunkter på detta.
björn
är ny här och har en fråga.
har tidigare uppgraderat en gitarrförstärkare enl den här texten med
lyckat resultat.
tda2050-->lm3875 :
56 Watt conversion
Unscrew the TDA2050 from the heat sink. You may want to consider adding a fan or using a bigger heat sink although under most conditions the stock heat sink will work. Unsolder the leads of the ribbon connector at the small pcb. Remove the cap from the pcb to reuse with the new LM3875. The wires of the ribbon connector are labeled. Connect them to the LM3875 as follows:
A/W to pin 8 (Vin -)
B/W to pin 7 (Vin +)
C/W to pin 4 (V-)
D/W to pin 1 (V+)
E/W to pin 3 (output)
Reconnect the cap to pins 4 and 1. Observe polarity. Or use a 1uf to 10 .uf 100v electrolytic cap between pins 4 (-) and 1 (+) if the old one cant be used
min fråga:
har nu en gitarrstärk samma märke fast med en tda2030 istället.
kan jag gå till väga på samma sätt med denna konvertering som på
den gällande tda2050 ?
jag läste det här på ett annat ställe :
The power chip upgrade was a straightforward job, as the TDA2030 and TDA2050 chips are virtually identical. I ought to read through both spec sheets more carefully to see if I need to change the resistance and capacitors in the power amp circuit to better bias the mess, but at the moment, I'm feeling lazy, and I don't really relish the idea of tracing a PCB circuit without a schematic. I also clamped on an extra piece of heatsink metal, just for good measure.
tacksam om någon kunnig vill ge synpunkter på detta.
björn