Moderators: Dave Moll, Andrew Davie, Steve Anderson
Steve Anderson wrote:If it were the kids, be thankful it didn't implode with potentially shards of glass flying everywhere...and the exposure to the nasty chemicals that often make up phosphors and cathode coatings.
A warning to those maybe new to tubes/valves, wear safety glasses and a face-mask when handling these things (we're all used to those now, no excuses)...especially anything larger than what you'd find in an old radio...CRTs for example...the photo shows something like a 'harmless' little ECC83/12AX7...
If you wear corrective glasses (as Harry and I do, aka, spectacles) make sure the safety glasses are suitable and fit well over them. Also use them when drilling, cutting metal or fibreglass (PCB material). Follow the guidelines of any decent machine-shop. While you're about it, invest in a decent first-aid kit...add stuff for burns too, soldering iron accidents, they happen.
Steve A.
Steve Anderson wrote:Harry, am I correct in thinking you've done a 3BP1 CRT monitor before? OK, not all valve/tube maybe but worth refreshing ones mind by having a look at it and/or drawings/postings etc..
Steve A.
rSteve Anderson wrote:Excellent results Harry! More linear than I expected. No wonder it was called 'Phantaston'. I've not made one myself...
You will see differences between tubes/valves, that's down to amount of use previously, age, production batch and manufacturer. No different to semi's to a large degree. In certain cases even more so, and for semi's throw in temperature too.
Rather than moving on to deflection (which you can be sure will work), I'd tackle syncing/triggering next, it's the next unknown...
Steve A.
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