Peavey Classic 50/50 quiet fan mod....now with pics!!!

[GuitarGuyLP]

So I have a Peavey classic 50/50 that I use at home, and the fan is crazy loud for home practice. I had one of these a while ago, and I did this same mod so I know it works great so I thought I would post it here.

The stock fan is 120VAC, 30CFM, and super loud. Computer fans on the other hand are very quiet. I found a 28 CFM fan that is 22dB loud for $5 locally, and I have a spare 12VDC adapter that I grabbed from an old phone or something (I always keep the adapters if they are 9, or 12V). I will post pics when I am done...

 

[glpg80]

Thank you for once following the CFM's and using close to the same value as stock. it kills me when others put lower grade fans with less air flow and sacrifice circuit stability simply because of a dB preference.

Id love to own a classic 120/120 some day, post up some pics dude

 

[GuitarGuyLP]

The thing is with the larger blades for the fan size you can actually put in a higher CFM fan, but I prefer to keep it close to stock when I can.

I am also thinking about trying a mod to the feedback loop to get a dampening control added. I have a switch on my Peters that lets me use the resonance control as dampening, and the effect it has on the sound is huge!!!!!

 

[GuitarGuyLP]

Here are the full details, and pics

1st pic open it up, and DISCHARGE THE FILTER CAPS!!! Cut the 120VAC wires to the stock fan

2nd pic clip the wire on your power supply, strip the wires back about 1/4", tin the wires with solder push them into the female fittings on the fan quick disconnect, or you can cut the fan wires, and solder the wires together. I prefer keeping the connector intact when I can. When I zip tie the excess cable at the end I bend the wires over at the connector, and put a tie around it so that the wires do not come out.

3rd pic Strip the 120VAC wires that went to the stock fan so that they can be soldered to the power supply. Note: you will need a powerfull soldering iron to get a proper connection to the power supply. Note #2:Remember to put heat shrink over the wires so that you don't have exposed 120VAC. There are already enough shock hazards inside a tube amp no need to have more.

4, and 5 I just used double sided tape to hold the power supply in place If you use your 50/50 for gigging, or if it is moved around a lot you might want to use some epoxy, or other adhesive that will hold it a lot better.

6 make it neat, and tidy.

Remember to test it when you first connect the fan to the power supply, just plug it into the wall. Also test after you solder the 120VAC lines to the power supply before putting heat to the heat shrink, and a final test before putting the cover back on.

Enjoy, and if you aren't comfortable with soldering, or electronics do not attempt this!!!

With this mod your 50/50 will now be as quiet as a computer