wakibaki

Glad you got that out of your system w

nwavguy reckons that 2V rms is sufficient with these phones. This is for 0.2V pk in at 1/2 vol on pot. Of course there's the question of a transformer, but there's plenty more voltage swing before clipping, you can probably tweak a lot less THD out of it, maybe some GNFB?

Now I can tell.

Hi, Are you guys still there, I mean visiting this forum? w

I dunno if the broken tap issue ever got solved, it was a while ago, but one way I might approach this is to try to cut a slot in the top of the tap with a diamond disk or other abrasive disk in a Dremel. Then you've got something that will accept a screwdriver. Abrasives are among the few things that will mark a tap. This is something that I've had to do to extract screws, sometimes old rusted crosshead ones in cars offer no purchase for a driver. The penalty would be a slot cut into the workpiece, but it might be better than losing the workpiece or being forced to drill and tap another hole elsewhere. If the tapped hole is to hold down a coverplate, the groove might never be seen. w

I have a Hantek DSO2150 USB scope. It has 150MS/s and 50MHz claimed if you only run one channel. It cost me £129.98 or $210 US, whichever makes the most sense to you. It's about as cheap as you can buy anything new claiming a 50MHz B/W. I like it. I like it better than a Picoscope. The nice thing about a Picoscope is that it's self-contained. I mean the ones with the self-contained probe, like a USB toothbrush. Handy and robust enough to keep in a laptop bag stuffed in with a few pliers, wire strippers, side cutters, crimp tools, crimps, connectors, screwrivers straight and crosshead, multimeter, cable tester, Allen keys, soldering iron, solder, spare cables, USB RS232, card reader, torch, loupe, camera and whatever is the order of the day. I put the Swiss Army knife in the suitcase in the hold for international travel. I used some very fancy 'scopes, too. Logic analyzers, spectrum analyzers and network analyzers. I did a year of release test on military digital radios at Racal, now Vodafone, for my student placement, the last 3 months developing ATE in the Lab writing HPBasic, the forerunner of Labview, to run test racks over IEEE 488 (GPIB). I know wherof I speak. w