Ok thanks ,i got it.
Are the 1N5711 diodes interchangeable with 1N4007?
I'm afraid not🙁
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No they aren't. We'll need to get you a few more parts to finish assembling. Please let us know what you are missing. I was short a few parts when I put that together.
Unfortunately - not really.
1N5711 are the high-speed schottky diodes - high speed is important here.
So,i will ask a topic supplier tomorrow.
If only the high speed is important,what about BA157,159,BYD33?
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In fact, 1N4148 is closer to the required parameters, than all the other ones, mentioned by Thimios (those are mostly rectifiers). Capacitance is only twice as much (4pF vs 2pF), recovery time is higher (4-8 nS vs 100pS), but good enough for the purpose - I ran a few simulations.
So, 1N4148 can be used - it will just require re-biasing, as its forward voltage drop is slightly higher. Reserved placeholder within the bias spreader can be used for resistor, adjusting the trimmer's threshold if required.
Yes i have them in hand.
BTW i can wait,tomorrow i will have 25 pieces 1N5711 in hand.🙂
Good idea. In fact, if 1N4148 will show good performance - it will be in favour of DIY community - one of the most popular small signal diodes.
What is the expected bad thing using a non ideal diode here?
I have in hand the bav21 too,i can't find the forward rise time for this diode,i don't know if it is fast enough😕
Distortion level at high frequencies can increase if the diodes are not fast enough. 1N5711, being very fast for the purpose, does not show any issues at all.
Small progress on power supply board (modifications are just for test).
I'm afraid that is time to desolder some of the power amplifier transistors🙁
I believe that these must be mounted on main heatsink.
To be more clear,Jef i see two points where you type +24v/-24v on power supply board.Is it right? To my point of view this points are connected to main power supply board.
I'm afraid that is time to desolder some of the power amplifier transistors🙁
I believe that these must be mounted on main heatsink.
To be more clear,Jef i see two points where you type +24v/-24v on power supply board.Is it right? To my point of view this points are connected to main power supply board.
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Yes those three transistors mount under the board on the heatsink.
The +/-24V markings are just netports for the rail voltages. The 24V number is just a place holder, not an actual voltage reading. You will see +24V marked in other places on the schematic. These are all connected without actually having a line drawn.
The +/-24V markings are just netports for the rail voltages. The 24V number is just a place holder, not an actual voltage reading. You will see +24V marked in other places on the schematic. These are all connected without actually having a line drawn.
Thanks Jef!
I'm so harry and i must to desolder now.🙁
Is the rectifier board missing too?
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