diyAB Amp The "Honey Badger" build thread

[CyrillK]

Hello, I have built a honey badger and when I turn it on, the leds light up, the tests resistors stay cold but I measure -59V at the output on both of my two boards v2.4 from the diyaudio store. I have used the componenents from the 2.0 version, does the problem come from this? Thank you for your answers and sorry for my mistakes, I'am still learning english.

 

[CyrillK]

I'am sorry for the double post, I made a mistake and thought that my first post was cancelled.

 

[ross mason]

I have 1n3027b zeners available. These are 20 volt devices. Can I use them instead of 12-15 volt zeners!

 

[stuartmp]

my new vmos OPS and PSU

View attachment 696981

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View attachment 696983

Nice work. I really like those coloured screw terminals. Do you have a part number for those and were did you get them?

 

[ross mason]

Two questions:
1) Can the zener diode be 20 volts instead of 12-15? (I have two of them in my parts stash).

2) where is the best place to attach the audio input ground? G1 or G2?

 

[janusz]

Hello, I have built a honey badger and when I turn it on, the leds light up, the tests resistors stay cold but I measure -59V at the output on both of my two boards v2.4 from the diyaudio store. I have used the componenents from the 2.0 version, does the problem come from this? Thank you for your answers and sorry for my mistakes, I'am still learning english.

I do not know version 2.0. Unless it's completely different parts have nothing to do with it. You have negative rail voltage on the output. Either you have shortened tracks somewhere or you have faulty transistors, most likely power ones.

cheers,

 

[HatlessChimp]

I just ordered the HB PCB's from the DIY Store. [emoji3]

This is going to be fun. Hoping Mouser and Element14 have most of the bits.

 

[helitim]

I just ordered the HB PCB's from the DIY Store. [emoji3]

This is going to be fun. Hoping Mouser and Element14 have most of the bits.

I got my stuff from Mouser. The only exceptions were the transformer, and the enameled wire.

 

[still4given]

 

[HatlessChimp]

I got my stuff from Mouser. The only exceptions were the transformer, and the enameled wire.

Thanks mate!

Where did you get your transformer and wire? Wouldn't mind going g something decent for them.

 

[helitim]

I had the transformer custom wound from Primrose(here in Canada). I haven't used it yet, but it appears to be very high quality. Many of the builders here use the recommended Antek transformer with good results.

The enameled wire was harder to find. I ended up getting some from a local alternator winding shop as some members here suggested

 

[TonyTecson]

branded discarded ATX psu's are a good source of heavy gage hookup wires if want one...

 

[rock12]

Grounding schematic. Is there a simple and correct way to do grounding? I have the store psu and recommended transformer

 

[rock12]

On the antecedent an-8445 there is no ground wire?

 

[JarreYuri]

Hi!

I have taken some interest in this build and have a pretty simple question.
I was planing to use this amp with my Apogee Scintilla 1 Ohm version.

Can I add 7 more (10 total/channel) and maybe more output transistors and driving the unit using about +25V -25V with a 1500VA transformer and get away with it?
Big heat sinks.

I need the amp to be stable at 1 Ohm.

Cheers!

 

[rock12]

Here is pic of one side. Wires are long for ease of testing

 

[mbrennwa]

Here is pic of one side. Wires are long for ease of testing

Is the thermistor still considered safe as a ground loop breaker? Nelson Pass used used a thermistor like on your photo, but I believe the typical diode bridge solution is preferred.

 

[HatlessChimp]

Not many people that have shared their finished HB Amplifier. Would love to see some pictures lads 😀😛

 

[mbrennwa]

Here's mine: Honey Badger.

 

[HatlessChimp]

Here's mine: Honey Badger.

Very nice. Did you design the psu cap pcb's yourself?

How come you went a 600va 230v toroidal with 30v secondarys? I was looking at the 800va with 45vac secondarys.

Thanks for sharing!