lineup said:
Is it Class A?
Not quite.
It's hardly a preamp - just a PGA2311. 5VA would be pretty marginal in most cases but here probably doesn't matter much.
There are two power supplies, one digital and on analogue. The digital is +-5V for PGA2311. The other is for the PIC, and relay board and is +5V. If I roughly divide the current consumption for the analogue one,
PIC = 10mA
LCD+Backlight = 50mA
IR sensor = 5mA
Relay board (2 Relay on) = 75 mA
misc = 60mA
It sums up = 200 mA
The analogue supply is parallel that means total current capacity@5V = 500mA. That should be sufficient. Please somebody correct me if I am wrong.
Regards
Farooq
PIC = 10mA
LCD+Backlight = 50mA
IR sensor = 5mA
Relay board (2 Relay on) = 75 mA
misc = 60mA
It sums up = 200 mA
The analogue supply is parallel that means total current capacity@5V = 500mA. That should be sufficient. Please somebody correct me if I am wrong.
Regards
Farooq
Hi Farooq
a colleague of a german DIY forum has built that preamp and after two hours critical listening the preamp rests on top of his cupboard and gets dusty. I would eventually propose another preamp. Do you know the P88 from Rod Elliot of Australia? That is more High End!
Elektor Preamp
a colleague of a german DIY forum has built that preamp and after two hours critical listening the preamp rests on top of his cupboard and gets dusty. I would eventually propose another preamp. Do you know the P88 from Rod Elliot of Australia? That is more High End!
Elektor Preamp
the Elektor circuit is sensitive against highlevel sources, DC, RF and cable capacitancea colleague of a german DIY forum has built that preamp and after two hours critical listening the preamp rests on top of his cupboard and gets dusty.
just the naked chip between input selector and output connectors
highend! no evil passive parts!
regards
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Amplifiers
- Chip Amps
- High End Preamplifier