Revisited R109, all is well. I was able it get the ~40mV. Like you said lots of headroom on the resistor.
Both channels are ready for full voltage! Thanks for all the help. Things are about to get busy, so it may be a little bit before I finish it up.
Both channels are ready for full voltage! Thanks for all the help. Things are about to get busy, so it may be a little bit before I finish it up.
I just checked the steps describing measurements with output transistors installed. My assembly instruction version probably was superseded, nonetheless, the steps required to measure resistance between V+ to ground, V- to ground, Output to Ground etc.
I did check the output bias as required, my power supply was in series, and cables were connected as required. I set the voltage to max (30V) and current to .8A but as you can see in the image - PCB did not draw much at all and the negative rail was at 0 V at all times. Fuses are fine.
To be honest I don't remember what happened, I think the board went dark after I connected the speakers, but am not too sure as it was a long time ago.
Sorry, I don't follow Stuarts guide neither do I work with a GWInstek lab supply. You did observe polarity while measuring the resistance between output and neg. rail, and also disconnected the power supply, did you? As there are diodes between rails ground and output, changing polarity will give you a different reading. If neg. rail is really low resistance to the output I would start with checking the isolation between the output transistors and the heat-sink.
I did, just rechecked - V+ to output gives 3 ohm, V- to output- same 3 ohm.
Checked output transistors to heatsink- no continuity.
Checked output transistors to heatsink- no continuity.
I know it is a DIY site, but I am so busy these days that my intermittent approach to troubleshooting might take a very long time. I know it is against the spirit of everything we do here, but considering the circumstances does anyone know someone willing to help me to sort out the amplifier?
I am feeling uneasy even contemplating this, I hope you ll understand 🙂
I am feeling uneasy even contemplating this, I hope you ll understand 🙂
Nice! please post repair details here , if someone does manage to repair.
I'll do my best to help @voxxonline if I can - logical for me to try to assist because we're both in UK! No guarantees but, of course, if I'm able to find & fix his 'problem' I'll post my findings on here in case it may help anyone else ...
Are you really asking for 45V DC rail voltage (very low) or do you actually mean 45V AC transformer secondaries?
Hello, fellow Wolverine enthusiasts!
We're thrilled to announce that our 4th group buy is now open for registrations. 🙂
This is a golden opportunity for all DIYAudio community members who are passionate about High-fidelity Audio and
looking to enhance their sound systems with our Wolverine boards to join our group buy.
Click here to register your interest in the 4th Group Buy
After the success of the 2nd group buy the Wolverine Team has spent a significant amount of time trying to optimize the
layout of Wolverine boards a little further. We have built and tested a number of prototypes. Our findings were enlightening to say the least.
We found that our current layout actually delivers the best all round performance. However, we did make a few minor improvements to enhance the
assembly process.
So apart from fixing up a few minor layout issues, we are super happy with what we are offering the DiyAudio community.
In summary.
my personal gratitude to each member for their hard work over the past year.
A very special shout-out to Andy (@fireanimal), who has gone above and beyond in building and testing all of the
prototypes, ensuring we only offer the best to the DiyAudio community.
Please take a few moments to post your thoughts on your Wolverine build and thank Andy for his commitment to this project.
I look forward to receiving your orders over the coming weeks.
We're thrilled to announce that our 4th group buy is now open for registrations. 🙂
This is a golden opportunity for all DIYAudio community members who are passionate about High-fidelity Audio and
looking to enhance their sound systems with our Wolverine boards to join our group buy.
Click here to register your interest in the 4th Group Buy
After the success of the 2nd group buy the Wolverine Team has spent a significant amount of time trying to optimize the
layout of Wolverine boards a little further. We have built and tested a number of prototypes. Our findings were enlightening to say the least.
We found that our current layout actually delivers the best all round performance. However, we did make a few minor improvements to enhance the
assembly process.
So apart from fixing up a few minor layout issues, we are super happy with what we are offering the DiyAudio community.
In summary.
1. The IPS boards will be the same as the 2nd Group buy.
2. The EF3-3 & EF3-4 boards will have a few minor improvements to the layout to aid in assembly.
a. The feedback trace has be finalized.
b. The pre-driver heatsink is also pinned for extra stability
c. On the EF3-3 (J102) has been moved slightly to the left to increase clearance to the heatsink.
This journey wouldn’t have been possible without our dedicated Wolverine team, and I would like to extendmy personal gratitude to each member for their hard work over the past year.
A very special shout-out to Andy (@fireanimal), who has gone above and beyond in building and testing all of the
prototypes, ensuring we only offer the best to the DiyAudio community.
Please take a few moments to post your thoughts on your Wolverine build and thank Andy for his commitment to this project.
I look forward to receiving your orders over the coming weeks.
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Where can I get the latest version of the Wolverine schematic, including the .asc file for ltspice?
I looked for about 100 pages here on the forum and couldn't find it.
Grateful
I looked for about 100 pages here on the forum and couldn't find it.
Grateful
Schematic is in post #1. of this thread and an .asc spice file can be found somewhere in the
DIYA store "Wolverine" (Son of Badger) .... suggestions ?? thread.
https://www.diyaudio.com/community/threads/diya-store-wolverine-son-of-badger-suggestions.369758/
It was posted there long time ago by @ostripper .
DIYA store "Wolverine" (Son of Badger) .... suggestions ?? thread.
https://www.diyaudio.com/community/threads/diya-store-wolverine-son-of-badger-suggestions.369758/
It was posted there long time ago by @ostripper .
In post #1 there are pdf files mentioned, but I cannot download these files (no link in the post#1)