Record Power AC400 PCB Upgrade

I've just received a new PCB for the AC400 Air Cleaner from the excellent people at Record Power. Their customer service department is fantastic. As recently reported in my blog back in December 2014 an issue had been identified with the Mark I and Mark II PCBs which could cause overheating. In fact I had already had a Mark I board burn out. This was replaced as part of RPs 5 year warranty.

The new PCB module came yesterday with full instructions on how to fit it. There were a number of screws to remove to gain access to the motor module and PCB module. A couple of 5.5mm nuts hold the PCB in place and two push in connectors make the electrical connection.

Mark II PCB on the left
Mark III PCB on the right

MusicMaking Gear

Here's a few musical instruments, amplifiers, effects and recording gear at Casa TMc

Dunluce Rapter Synth guitar, Tanglewood acoustic, TMc TCaster, TMc Lapsteel, Fender F-03 Acoustic

Knock down saw horses and low assembly table - Part 2

So here are my finished knock down saw horses in a few different configurations. All the edges have a 1/4" roundover.

Saw horses without crossmembers
They just work like a pair of regular saw horse

Knock down saw horses and low assembly table - Part 1

When cutting up large sheets of material, plywood, MDF etc., it is always better to break them down at a lower level (to prevent back problems) and with a circular saw (Festool track saw or even just a circular saw with a guide).
I saw the design for this a few years ago and redesigned it from memory. I didn't have much difficulty in remembering the design as it is so simple. Essentially it comprises 4 legs, 3 long sections and 3 cross members. It is possible to obtain all the parts from a single sheet of 8' x 4' x 18mm (3/4" nominal) plywood. I used external hardwood plywood as it is easily obtainable from a home centre. This will support a full sheet of 8' x 4' with no problem.

I can't remember the original inspiration for this design so apologies if it was you.

First of all I designed it on Sketchup and came up with this.

One possible assembly