View Full Version : Running Truepath below +/- 35 V
Is it possible to run the Truepath on lower supply voltages? I assume it is just a matter of resistor choices, right? I would like to try it out, while putting off upgrading my existing power transformer which I bought for an AMP1 board.
The 3020 data sheet says the minimum supply voltage is +/-15V. There are performance curves (THD+N) for 23V but at this voltage it's only a 20W amplifier.
Yes, it is possible to run on lower voltage and yes, it's a matter of resistor choices.
1.07K, 1% R107 R110 R207 R210
13.3K, 1% R106 R109 R206 R209
392K, 1% R4
1.18M, 1% R5
422K, 1% R6 R7
1.13K, 1% R107 R110 R207 R210
8.25K, 1% R106 R109 R206 R209
249K, 1% R4
750M, 1% R5
267K, 1% R6 R7
> Yes, it is possible to run on lower voltage and yes, it's a matter of resistor choices.
I have a spare 2*24V (600VA) toroid. is it possible to get Truepath kit delivered with the corresponding resistors?
2nd question: will the (to be announced) PSUs for Truepath work with this transformer?
I don't know whether Jan is going to supply these resistors.
On the other hand, these 12 resistors are not that expensive that they will ruin your economy.;)
The PSU for Truepath will work with transformers up to the capacitors max.voltage/1.414 (which I think is 63V/1.414=~44V)
> these 12 resistors are not that expensive that they will ruin your economy.
but minimum order and s&h costs a multiple; not everybody has a parts shop nearby.
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