Hugo Holden's latest activity

I have attached the info required to make these boards. Since the audio output with the 8 Ohm speaker has about x3 the power of the 45...

I built a home made proto pcb . (In lieu of plated through holes on a proper pcb where wires pass into a pcb on these home made ones I...

Yes, I agree, it is the next project to be targeted for replication. I suspect it would be a rare item to find either built or un-built...

That Monkey.mov reminds me of a Bruno Mars music clip.

I'll post just the track image and artwork. Probably this could be converted into a Gerber in little time ( by Gary maybe) in Kicad...

How do you know the opto-couplers are dying ? there is no scientific evidence presented. Just because they are getting hot doesn't...

@nullvalue wanted a pcb for this project. After looking at this for a while, I tend to agree, it is the way to go. It is all about...

Multiple appliances (not just the PET) had filter cap units applied across the incoming line voltage. Many were three wire types which...

Yes it is all over the place on ebay, have a look at this German cable, the label in the photos, they called it a D sub 9...

Can you lift up the lid of the PET to move the VDU further away from the power transformer and see if that is the cause. After that, if...

Yes it is kind of charming. What I will do for mine is get one 5m long or similar F:F or M;M RS232 cable (and cut it in half) since...

There was a phase shift error in the horizontal timing of the text signals with respect to the H drive pulse timing, but not the cursor...

I was surprised what good value it was. The software disk installed effortlessly (on my HP computer running Windows XP), And it has...

I cannot agree: The DC signals from the Joysticks are derived from a Thevenin resistance of 2.5K and not prone to interference, nor are...

Unfortunately, this is what started the You-Tube urban myths by latter day repairers of vintage TV's and VDU's who where completely...