Max outputvoltage 9,2V with 18V transformer ?
Is it normal that I lose about 11 volts in the pre-regulator ?
I have 23 volt unstabilized and 11,8 volt at the output of the LM317T pre-regulator. I measure 9,2 volt max at the output.
Is it normal that I lose about 11 volts in the pre-regulator ?
I have 23 volt unstabilized and 11,8 volt at the output of the LM317T pre-regulator. I measure 9,2 volt max at the output.
Thanks. 🙂
I have updated the BOM for more voltages. Notice that the schematics with the blue text "Variant name, [No variations]" means that it contains optional parts and you should not use for building. Use only the schematics and the BOM with a variant name.
I have updated the BOM for more voltages. Notice that the schematics with the blue text "Variant name, [No variations]" means that it contains optional parts and you should not use for building. Use only the schematics and the BOM with a variant name.
Can you please point me on the configuration I need to get 24-28V(adjustable) PSU. Sorry, for that, I just newer had deal with Reg. PSU.
28 volts out needs a 30-33 VAC transformer. Curious, why the need for a variable voltage and so little?
I am making a psu for BA3 as a pre, which needs around 24V. In future I will maybe try it as a FE for F4, that I will around need 30V. Do you think I can make it with max 30-35V and adjust down to 24V?
Exchanging the resistors was of course a hell of a job but in the end it worked 12,03 and 12,3 Volt. I did not use 1% resistors but used what I had in the bin.
Thanks for the group guy!
Is it safe to replace AD825ARZ with OPA627AU (used them in an I/V stage in a DAC years ago, now just gathering dust)? I can't find the unity gain bandwidth but according to the datasheet it is unity gain stable. Or is it a bad replacement performance wise even though it is safe to replace?
Is it safe to replace AD825ARZ with OPA627AU (used them in an I/V stage in a DAC years ago, now just gathering dust)? I can't find the unity gain bandwidth but according to the datasheet it is unity gain stable. Or is it a bad replacement performance wise even though it is safe to replace?
Well I missed it at the first look, but it's in the datasheet curves plot section. It's about 17-18MHz at 0dB gain. Is this too slow for optimal performance? In the description Per-Anders writes "The AD825 has the bandwidth of 34-37 MHz at unity gain", so OPA627 would be only half of that speed. Would it degrade the cirquit from extra-low to low noise?