Peavey MiniMax fan

[Marvin]

As anyone who owns one of these amps knows, they sound great, have all the gubbins you need on them, are loud BUT so is the fan. It's a bit like having your own aircon unit soundwise. 

When you're playing it's not an issue, I wouldn't sell it just because of the fan noier but, we'll you know.🙂 

 

Has anyone sourced a quiter replacement fan? From what I've researched it's tricky if not impossible. 

[NHM]

I'm a fan (geddit?) of these amps too, really punchy, full sound, I have one which is my back-up. It is only used in loud situations so the noise isn't a problem for me.

[Marvin]

Well, the fan is incredibly quiet now. 

 

Heard a tiny click after I turned the amp on, and then no power. 

It's now a large paperweight. 

[Stub Mandrel]

1 hour ago, Marvin said:

Heard a tiny click after I turned the amp

 

Fuses checked?

[Hellzero]

Just in case the amp starts working again use the below mentioned Noctua fan with their tension adapter from 24 to 12 Volts.

 

These are the most silent fan you'll find.

 

https://noctua.at/en/na-vc1

 

https://noctua.at/en/nf-a6x15-flx

 

Everything is available from Amazon.

 

https://www.amazon.co.uk/Noctua-NA-VC1-Step-down-Converter-Applications/dp/B0C6TQCQP7/

 

https://www.amazon.co.uk/Noctua-NF-A6x15-FLX-Premium-60x15mm/dp/B0DJMHV4RP/

 

[Marvin]

4 hours ago, Stub Mandrel said:

 

Fuses checked?

The internal fuse looks blown. I've ordered some new ones, but I'm not hopeful that's the source of the problem.  I think the fuse blew because there's a deeper problem. 

[Stub Mandrel]

I wouldn't give up... fuses can degrade over time. An instant fail like that suggests inrush current. But could be a failed PSU capacitor, for example.

[Hellzero]

Some fuse holders, especially the ones integrated in the power socket, have a place for a spare fuse, did you check that?

 

That said, you should always have some spare fuses at hand.

 

If it's only a blown fuse, it will be the more expensive one. 😉

 

As @Stub Mandrel said, inrush current or a huge surge can blow a fuse instantly...

[Marvin]

I have changed the internal fuse... quite a firework. 

 

A cracking noise, a spark that shot out of the fan and it tripped the house consumer unit.

 

 

[NHM]

Unlucky.

[Stub Mandrel]

3 hours ago, Marvin said:

I have changed the internal fuse... quite a firework. 

 

A cracking noise, a spark that shot out of the fan and it tripped the house consumer unit.

 

 

 

Is the fuse on the high side  (i.e. mains side of the transformer) or between the PSU and the amp or speaker outputs?

[Hellzero]

2 hours ago, Stub Mandrel said:

 

Is the fuse on the high side  (i.e. mains side of the transformer) or between the PSU and the amp or speaker outputs?

At the back. 

[Marvin]

13 hours ago, Stub Mandrel said:

 

Is the fuse on the high side  (i.e. mains side of the transformer) or between the PSU and the amp or speaker outputs?

 

The fuse is directly under the power supply connection... so I would assume between the PSU and the amp (I'm not very electronics literate though).

[Stub Mandrel]

Probably time for an electrician to get involved. 

[NHM]

I'm sorry to hear of the demise of Marvin's Minimax, but without wishing to appear insensitive to his loss, I'm interested to make mine have a silent fan.

I've just opened it up, and the current fan is 60x20mm, 24v, 0.11A and two cable (see pic below) (unlike the ones recommended earlier which were three cable).

 

Would this be a good choice?:

 

Jopto 2PCS Mini Brushless Silent 3D Printer Cooling Fan 60x60x20mm 6020 DC 24V Fan With 2 Pin Terminal Compatible With Laptop 3D Printer PC CPU Computer Cases For DIY With 30cm/11.81inch Cable : Amazon.co.uk: Business, Industry & Science

 

[Hellzero]

The one I recommended above can be used with 2 wires, the third being for the speed regulation.

 

Furthermost if you use the special cable to further reduce the speed it will be a two wires out. 😉

 

I've put these Noctua fans in almost all amps I've owned, and it means a lot of amps.

[NHM]

I did an experiment with my Minmax this afternoon - I unscrewed the fan and took it out, powered up the amp on my desk with the fan running away from the chassis. The same noisy fan was virtually silent, so it is the casing that creates the noise. I need to find a way to make a 'silent' mounting.

[agedhorse]

3 hours ago, NHM said:

I did an experiment with my Minmax this afternoon - I unscrewed the fan and took it out, powered up the amp on my desk with the fan running away from the chassis. The same noisy fan was virtually silent, so it is the casing that creates the noise. I need to find a way to make a 'silent' mounting.

Correct, there's a lot more to a quiet cooling system than just the fan, and a lot of ways to inadvertently turn a modified amp into a perpetual paperweight...

[Hellzero]

4 hours ago, NHM said:

I did an experiment with my Minmax this afternoon - I unscrewed the fan and took it out, powered up the amp on my desk with the fan running away from the chassis. The same noisy fan was virtually silent, so it is the casing that creates the noise. I need to find a way to make a 'silent' mounting.

The airflow itself is very noisy.