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The Wolverine 5th Group buy

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S

stuartmp

Member
Joined 2016
#1
Hi Guys,

Please register your details for the Wolverine 5th Group Buy - Pre Order.​

After the success of the past four group buys and increasing demand for Wolverine boards, we are thrilled to announce another group buy for the DiyAudio community.

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This time, we are offering the new and improved Wolverine V5 boards, along with supporting parts and boards:
  1. IPS, Pre-Driver & Driver Heatsinks with Mill-Max pins installed:
    • EF3-3 (IPS, Pre-Driver & Driver): $27.50 USD (6 Heatsinks Total)
    • EF3-4 (IPS & Pre-Driver): $22.50 USD (4 Heatsinks Total)
    • EF3-4 (IPS, Pre-Driver & Driver): $27.50 USD (4 Heatsinks Total)
    • IPS: $10.00 USD (2 Heatsinks Total)
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  1. 2SA1381E / 2SC3503E Transistors:
    • $3.00 USD each or $6.00 USD per pair.
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We are also offering the following supporting boards:
1. "Dual Bridge Rectifier Board" by @stuartmp – Includes Schematic & BOM:​
- $12.50 USD each.​

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2."Speaker Protection Board" by @jjs – Includes Schematic & BOM:​
- $20.00 USD per pair.​

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3. "T-Ground Board" by @stuartmp – Includes BOM:​
- $5.00 USD each.​

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4. "Ground Lift" by @stuartmp – Includes insulated washer & BOM:​
- $5.00 USD each.​

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Thank you all for your support of the Wolverine project over the past 3 years. It’s incredible to think our first group buy was back in March 2022.

Registration Instructions:
We will follow the same process as the 3rd & 4th group buys to streamline processing. Board color will be determined based on order numbers; if insufficient, only one color will be ordered.

Pricing for Boards:
Wolverine V5 Special Edition IPS Board (2 boards):
$15.00 USD.​
(Color to be determined: possibly yellow with blue silkscreen please give us your feedback on the forum)​

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EF3-3 Boards: (4th Group buy boards shown for illustration purposes)
2 x Precision V5 EF3-3 Boards + 2 IPS Boards: $50.00 USD.​
4 x Precision V5 EF3-3 Boards + 4 IPS Boards: $90.00 USD *.​

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​

EF3-4 Boards: (4th Group buy boards shown for illustration purposes)
2 x Precision V5 EF3-4 Boards + 2 IPS Boards: $55.00 USD.​
4 x Precision V5 EF3-4 Boards + 4 IPS Boards: $95.00 USD *.​

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Please note.
The discount will only be applied for those members who order boards before they are ordered from the PCB Manufacturer.
If you wish to order more than 2 sets or adjust quantity, please contact us for pricing details.

Shipping: Prices exclude shipping costs. Shipping is at cost price plus $3.00 for packaging. No added handling fees. A copy of the shipping receipt will be emailed upon payment.

Each Order Includes:
  1. Your ordered PCBs.
  2. A3 Schematic copies for 57V and 64V versions. (Dropbox Link)
  3. The Build Guide (~74-page illustrated A4 document). (Dropbox Link)
  4. BOM in Excel with Mouser part numbers. (Dropbox Link)
  5. Heatsink Hole Pattern DXF & PDF files. (Dropbox Link)
  6. "How to Wire an Audio Amplifier" by Bonsai. (Dropbox Link)
  7. Future updates will be available via Dropbox. Please provide an email for this purpose.
Payment: Through PayPal. Requests will be sent upon ready-to-ship boards.

How to Register:
  1. Open the attached Excel order sheet, fill it out, and email it to: Stuartmp@internode.on.net
    • Subject: "Wolverine Project – Your DiyAudio Username"
  2. If unable to open the file, please reply with:
    • Total number/type of EF3-3 & EF3-4 boards.
    • Name and total number of any of the supporting parts / boards on offer.
    • Full name, address (including country and postcode).
    • Phone number for tracking.
    • Your PayPal email address.
    • You Email address for Dropbox updates.
We will order boards once a sufficient number of pre-orders are reached and keep you updated throughout the process. Once received, we will calculate shipping and send payment requests. You will receive a tracking number once your order ships.

Please refrain from using my email for other inquiries; post questions on the main Wolverine Build thread or contact me via DiyAudio PM for order-related questions.

Wolverine Development Thread
For ongoing project updates and technical discussions, visit the Wolverine Development Thread on the DiyAudio forum. Engage with fellow audio enthusiasts and share your build experiences.

Wolverine Build Thread
The Wolverine Build Thread is your go-to resource for assistance with assembly tips and troubleshooting advice. Feel free to ask questions and contribute your insights.

YouTube Build Series
Explore our YouTube Build Series for visual guidance on assembling your Wolverine amplifier. Our instructional videos cover each step-in detail, ensuring a smooth build process. Thank you to @danieljw for putting this series together.

Support Contacts
Feel free to reach out to me directly through the forum's messaging system or my e-mail if you have any question related to the ordering process.

We truly value your involvement in the Wolverine project. By working together, we continue to make high-quality audio amplifiers accessible to enthusiasts worldwide. Thank you for your enthusiasm and support.

Best regards,
Stuart & the Wolverine Team
 

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#5
Chrisr3521 said:
Also as I'm a slow builder and have the modushop heatsinks drilled for the previous version of the ef-4 I'm hoping these will fit?
Click to expand...
Yes, the none of the hole locations have changed.
Chrisr3521 said:
I'm in, but how many bridge rectifier and ground lift boards for dual mono in the same case?
Click to expand...
I'm assuming you're using two transformers with 2 sets of secondary windings so that will require 2 dual rectifier boards. For the ground lift board you can use one but it's preferable to use two as it makes the wiring layout easier. Just make sure that you only have one common connection point from the ground lift boards to the chassis
 
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#7
stuartmp said:
Yes, the none of the hole locations have changed.

I'm assuming you're using two transformers with 2 sets of secondary windings so that will require 2 dual rectifier boards. For the ground lift board you can use one but it's preferable to use two as it makes the wiring layout easier. Just make sure that you only have one common connection point from the ground lift boards to the chassis
Click to expand...
Perfect, thanks,

With the heatsinks for the ef-4 if I've had them tapped by modushop which ones will I need?
 
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#11
shabusf said:
one quick query. Is the Wolverine V5 Special Edition IPS Board different from the default IPS board come with the V5 IPS/OPS combo?
I assume the change is only in colour.
Click to expand...
Yes, Both boards are the V5 Special Edition. We haven't decided on the colour.
This time around we are including Yellow / Blue as one of the colour choices and depending on numbers as I explained in post 1 we will choose the colour for the IPS so if you'd like yellow / blue please enter it in the order spreadsheet.
 
#13
stuartmp said:
If unable to open the file, please reply with:
  • Total number/type of EF3-3 & EF3-4 boards.
  • Name and total number of any of the supporting parts / boards on offer.
  • Full name, address (including country and postcode).
  • Phone number for tracking.
  • Your PayPal email address.
  • You Email address for Dropbox updates
Click to expand...

Count me in for four if the EF3-4 boards and associated parts. Just in case I can’t open and fill out the sheet, I remember kind of having trouble with that last time.

4 V5 EF3-4 boards

I would like all the associated heat sinks for building these four channels. I’m not entirely sure which ones to get, I’m guessing the one that covers all of the heat sinks I would need.

I would be interested in the bridge rectifiers, the speaker protection, the T ground, and ground lift boards. I guess I would like to hear opinions on what people think the benefits are, would the speaker protection degrade the sound or increased distortion at all? I’m not super familiar as you can see.

Also, I have Onsemi KSA1381E and 2SC3503E which from what I understand are Sanyo, yet the package says “ON”. I’m guessing it would be okay to pair these.


I purchased four boards in between some group buys, are these the fourth group buy? Or second?
IMG_6181.jpeg


Anyways, I am building these out to be on the 71 V rails, I noticed that voltage isn’t mentioned with the fifth group by, any reason?

Thanks!
Dan
 
#17
@stuartmp

Sent you an email yesterday, I’m basically interested in a pair of V5 Special Edition IPS boards, along with the requisite heatsinks and 2SC3503/2SA1381 transistors (however many are needed to build the pair of IPS boards).

Thank you once again for organizing what is one of the finest if not the finest DIY effort for a Class AB amplifier. What I brag about the most to my colleagues is the build manual. It is a reference standard amongst all diy manufacturers imho 🙏 :cheers: :worship:.

Best,
Anand.
 
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