audio-talk

I looked up Blue Diamond Machine Tools. Looks like a very dangerous place for me to visit. I bought a 1960s Luthy sensitive drill press last week. Predictably, the electrical department is a nightmare, but the important bits look fine, although there has clearly been no maintenance for decades.

I am hugely impressed by the deviousness of the "Getting the Green Light" post. Have you considered PR for a political party? Despite its tongue-in-cheekness, I may have to steal some ideas from there. Whether they will work is another matter. As to the Lowthers, Steve's Lowthers were pure...

Morgan could easily fit those in his room.. And that's what hurts. It's not as if big loudspeakers would mean you couldn't stretch your legs out. I knew I should have kept the previous big loudspeakers. I made them upstairs, so I just had to slide their 50kg (in a controlled manner) down the stairs...

As you say, they're a bit big. Quite a lot big, actually. I hope they justify their size. I expect they will. I have been trying to persuade the domestic management that washing machine sized loudspeakers are the only way of achieving clean bass but she falls back to the default argument of, "I...

4.5ms sounds perfectly plausible to align something to a subwoofer. You have a low-pass filter that adds a lot of delay, plus a little from the low-pass response of the driver itself.

Nice work. I was going to warn you that although a router does a beautiful job, you get a lot of leverage on the trammel and it's easy to overload the router's bearings. Looks like you discovered it for yourself; I wrecked my Elu router that way. I then bought a much bigger router. Which I don't muc...

Could very well be. Either way, it doesn't do what I hoped it might, and further thought and testing says extra poke wouldn't help. So I haven't spent 250 Euro or wasted time making something of my own. I suppose you could call that a win. And I've learned something. I've also noticeably flattened t...

And I've just measured the current drawn from those AA cells. 1.92A! No wonder it pulses 1s on, 1s off - the battery needs time to recover. All in all, a dangerous piece of kit. No need to make anything pokier - if this can't produce a visible glow from residual gas in a valve, then it's probable th...

Further experimentation shows that you need to have your fingers on the contacts or surface of a fluorescent tube or regulator valve to make it work. But I don't recall you doing that? And it's certainly not in the instructions. I don't much like having my fingers near the tip of a high voltage. Per...

I'll measure what it produces first. But it certainly didn't glow a fluorescent tube when held in contact.

Arrived. Disappointment. Insufficient poke. Just about managed to produce an orange glow in an 85A1 neon). I am told that:

If it's blue, it's air.
If it's green, it's barium.
If it's pink-purple it's argon.

And Jack's large nixie managed a blue glow with his tester, which I assume is pokier.

Ta for your thoughts all, I was wondering if there were any specific characteristics that Tantlum caps had that electrolytic don't, or vice versa. High ESR. (And very variable.) That's why they're recommended for regulators - the high ESR prevents a high Q resonant circuit forming. They're very fra...

Ordered.

Don't you just hate people who hide what they've done?

That would be super. If you're right in your guess, it should destroy LW reception. Presumably, you see characteristic colours associated with different gasses? I looked at the ends of the resistor wire fractures under a microscope and found all sorts of impurities instead of a nice metallic surface...