DIY Class A/B Amp The "Wolverine" build thread

[RickRay]

Also, check if your cap multipliers are working correctly, Build Guide, page 40, 17.1 G.

 

[Ryssen]

yes it is Q106

 

[Ryssen]

I get 1.59v and 147v

 

[Ryssen]

Q107 and Q108 gets hot to.

 

[RickRay]

I take it that is 1.47V. What voltage do you have across TP3 and TP4 on the IPS board?

 

[stuartmp]

Announcing the Wolverine 5th Group Buy - Pre Order Open Now!​

Hi Guy's
After the success of the past four group buys and the continued excitement around the Wolverine boards, we’re thrilled to kick off another round for the members of the diyAudio community. Your enthusiasm and support keeps this project alive, and we’re excited to roll out the Wolverine V5 Special Edition boards along with some fresh options to elevate your builds even further.

Register for the Wolverine 5th group buy​

Once we hit a solid pre-order count, we’ll place the order with our PCB supplier. I’ll keep you posted on progress. After the boards arrive, we’ll calculate shipping, send payment requests, and provide tracking numbers.

A massive thank you for supporting the Wolverine project since our first group buy in March 2022—three years strong!
It’s your passion that makes this amp a reality, and we can’t wait to see more builds come to life.

Best regards,
Stuart & the Wolverine Team

 

[Ryssen]

I take it that is 1.47V. What voltage do you have across TP3 and TP4 on the IPS board?

Will check when
I get home. Yes
Its 1.47v.

 

[RickRay]

@stuartmp How did everyone weather the cyclone? Hope everyone down there is doing well.

 

[Ryssen]

Across Q3- 1.75v catod - emitter
Across Q4- 1.24v Cahod- emitter

 

[RickRay]

Sorry, you misunderstood. Measure the voltage drop across R16, labeled TP3 and TP4 on the Input Board. We want to see what is being sent to the output board. You should have about 0.6VDC

 

[Ryssen]

yes its 0.6 volts

 

[RickRay]

Just to check everything you are doing.

1. checking input and output board together, with outputs installed, on a 30V bench supply.
2. you installed the 9.1k resistor across R17
3. You have Q105, Q106, Q107 and Q108 installed on heatsinks.
4. You adjusted R11 to 5.0V
5. You checked for DC on the output. (what was the reading)

 

[Ryssen]

I have not yet intsalled the output transistors.
I have installed the 9.1k resisistor.I am doing these test on 30 volts.
Yes those transistors are on heatsinks
I have adjusted R11 to 5.0v.

The voltage between TP107 and TP108 is 11v
The Q107 and Q108 gets hot so I cant leave the power on for long moments.

 

[RickRay]

Can you post a high resolution photo, from your phone camera, of the board top side and bottom side.

 

[RickRay]

Which pre-driver and driver transistors did you use?

 

[bullittstang]

Do you have J103 installed? Have you confirmed Q107 and Q108 are in the right spot, NPN (Q107) and PNP (Q108) locations? Does adjusting R109 trimpot make any difference on the 11V at T107/T108?

edit - make sure R109 is at max resistance to start

 

[jdoorn]

Did you switch Q107 and Q108 ?

 

[RickRay]

edit - make sure R109 is at max resistance to start

measure between pin1 and pin2 on back of board.

 

[Ryssen]

Q107,Q108 are MJE15032/MJE15033 are in the right places.
R109 on max resistance makes 13.5v at testpoint TP107 and TP108.So it can vary with the resistance.
the predrivers are TTC004BQ/TTA004BQ.
And J103 is installed.
I will see if I can get some fotos

 

[Ryssen]

Been locking at the board and it seems that the VBE Transistor is the wrong way...I will fix it tomorrow. and se if it helps.
Thank you all so far..