I bought the card in the picture and as usual it mounts NE5534 / 5532, can I replace them with OPA134 / 2134 without any modification to the circuit? I can replace them with OP27 OP270
which opamp to use so that noise and sharpness increase, can you give me some advice?
I don't know if anyone knows this card, but it would be interesting to know if the AC input on the right can be not powered.
don't tell me to use LME 49710 or 49720 as the ones in my possession are faulty as Texas stated in their forum that 15% were faulty (noise).
I want to specify that for the first time on the board I found that the components are original Wima, Nichicon, ST, BB, incredible for a board made in china
thanks and bye
which opamp to use so that noise and sharpness increase, can you give me some advice?
I don't know if anyone knows this card, but it would be interesting to know if the AC input on the right can be not powered.
don't tell me to use LME 49710 or 49720 as the ones in my possession are faulty as Texas stated in their forum that 15% were faulty (noise).
I want to specify that for the first time on the board I found that the components are original Wima, Nichicon, ST, BB, incredible for a board made in china
thanks and bye
foto
BB uses the NE5534s with an LT 1028 in the filter, the problem is that LT costs almost 20 Euro .. so what can I use in place of the LT 1028?
is an OP27 compatible with LT 1028?
what can I use in place of the latter.
the 9V power supply on the left of the photo is used exclusively to power the USB circuit, because in this case I would not power it.
thanks and bye
BB uses the NE5534s with an LT 1028 in the filter, the problem is that LT costs almost 20 Euro .. so what can I use in place of the LT 1028?
is an OP27 compatible with LT 1028?
what can I use in place of the latter.
the 9V power supply on the left of the photo is used exclusively to power the USB circuit, because in this case I would not power it.
thanks and bye
If you don't like the LME49710/20 the OPA1611/12 or OPA1656 may be good options. The OPA... products are in different processes than the LMEs, so they don't have the flicker/popcorn noise issue.
You can turn the surface mounted opamps into a DIP using an adapter. I like the DIP-ADAPTER-EVM by TI.
Tom
You can turn the surface mounted opamps into a DIP using an adapter. I like the DIP-ADAPTER-EVM by TI.
Tom