Hi ZM,
you wrote earlier all resistors are 600mW - would 500 mW go too?
Otherwise I have to desolder some of them
you wrote earlier all resistors are 600mW - would 500 mW go too?
Otherwise I have to desolder some of them
Okay, just wrote an email, but hey, I can present my endless dumbness here 
- all my resistors are 250mW types
So you mean they are okay?
- all my resistors are 250mW types So you mean they are okay?
those Dales are 250mW if you're making DIY BigBadaBoom device
when you're making preamp, they are 600mW
when you're making preamp, they are 600mW
Your Mightyness,
toward finishing two more probably dumb - but surely- questions:
Okay, three questions
Many thanks!
toward finishing two more probably dumb - but surely
- questions:- A fuse is not mentioned in the circuit diagram. I have 3x10va donuts @230V, so I think a 150mA would be okay?
- You sent 4 pcs small heatsinks and I suppose they are for the BDs (and not for the IRFs) - am I right?
- I´m planning to have 2 balanced and 3 SE inputs. I remember that this can be set with the InxDL diodes but can´t find it anymore how. Could you please explain it?
Okay, three questions
Many thanks!
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sinks for BD only
fuse 30VA/230V=0A13, so 120mA or 150mA - there is no soft start, you'll see whatyour exact xformers will say about popping da fuses during powering up
if pop, just increase fuse
on SE input just short neg input pad to gnd pad, and put appropriate jumper on diode jumper fields (1 to 5)
fuse 30VA/230V=0A13, so 120mA or 150mA - there is no soft start, you'll see whatyour exact xformers will say about popping da fuses during powering up
if pop, just increase fuse
on SE input just short neg input pad to gnd pad, and put appropriate jumper on diode jumper fields (1 to 5)
Thanks 
Regarding SE/bal I found the answer on your homepage; so if I mount in1dl-in3dl and use the jumpers 1-3, I will have 3 se inputs.
Regarding SE/bal I found the answer on your homepage; so if I mount in1dl-in3dl and use the jumpers 1-3, I will have 3 se inputs.
Hi ZM,
which voltage is on pin1 of the (24v) input selector relais? Could I use this voltage to drive LEDs (with a resisitor) in order to show which input is selected? (until I don´t use the remote control unit)
which voltage is on pin1 of the (24v) input selector relais? Could I use this voltage to drive LEDs (with a resisitor) in order to show which input is selected? (until I don´t use the remote control unit)
24V
which calls for 22K-39K resistor for each LED
24V is common, switch enabling neg return for selected relay
which calls for 22K-39K resistor for each LED
24V is common, switch enabling neg return for selected relay
Hi ZM,
just to be sure, I think I need an insulator (washer) underneath the srew for the mounting of IC1/M1 on the heatsink, am I right?
Without insulator the gnd of IC1 would be connected to the drain of M1.
just to be sure, I think I need an insulator (washer) underneath the srew for the mounting of IC1/M1 on the heatsink, am I right?
Without insulator the gnd of IC1 would be connected to the drain of M1.
Dear ZM,
In the first post you described the first power up for the SE. Is it basically the same for the balanced version?
In the first post you described the first power up for the SE. Is it basically the same for the balanced version?
yes, everything the same except double number of buffers
you can wire everything, just omit placing Gain jumpers on Turtle pcb, prior to setting buffer DC offset
that way , there is no connection between buffers and Turtle
when you're done with Iq and Offset settings, put jumpers in place
you can wire everything, just omit placing Gain jumpers on Turtle pcb, prior to setting buffer DC offset
that way , there is no connection between buffers and Turtle
when you're done with Iq and Offset settings, put jumpers in place