| opa548/opa549 gainclone amp - Click HERE for Original Thread |
| kozak |
hi everybody
I just got some opa 548 and opa549 from TI; I would like to make a small amplifier with these these chips as they seems to be quite good.
As anyone tried this schematic:
http://focus.ti.com/lit/an/sboa082/sboa082.pdf
else I would like to know what type of power supply to make (size of the transfo, size ofthe capacitors....)
thanks |
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| mandat |
Peter Daniel has compared gainclones with OPA549 and LM3875. Quality was approx. the same but OPA gives more "normal sounding", more hi-fi, while LM produces more "magic".
At last he advices LM3875 for gainclone. |
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| DSP_Geek |
| quote: | Originally posted by kozak
hi everybody
I just got some opa 548 and opa549 from TI; I would like to make a small amplifier with these these chips as they seems to be quite good.
As anyone tried this schematic:
http://focus.ti.com/lit/an/sboa082/sboa082.pdf
[...]
thanks |
Look out for figure 3: the + and - opamp inputs are reversed. |
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| soundNERD |
ahhh i hate acrobat...so slow
anyway, I like using national's BPA100 circuit with he 549. About 150-175W output. |
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| kozak |
well, I think I will give a try tomorrow at the university with the schematic from TI.
For now I will use a lab power supply and think about the "real" power supply after. |
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