I find these from time to time in my travels, but largely ignore them, but after seeing how much they go for on ebay and only costing 5 bucks a pop, i decided i should nab them.
It appears a few have built amps with them, so could be tempting to build an amp someday with them, since i have all the gear to make the transformers, it also seems you can get away with running these in an amp without the need of the extremely high voltages other transmitter tubes require.
Is there any way to make an adapter to test these tubes on the likes of a TV7 or other similar tester?
I have 9 tubes in total and at least 4 have a good full area on the glass with getter and look new, another 2 look new but appear to have a smaller amount of getter on the glass, and one of them appears used and no getter visible on the glass, but not white.
Could be a fun project and they are pretty magnificent tubes to look at.
I would imagine they would need a beefy power supply to run at their maximum ratings, looks like these things could easily pull 100 watts out of a pair?
Doesnt seem to be an awful amount of designs published, but I would feel that running in class AB2 would be beneficial to reduce power consumption when idle.
It appears a few have built amps with them, so could be tempting to build an amp someday with them, since i have all the gear to make the transformers, it also seems you can get away with running these in an amp without the need of the extremely high voltages other transmitter tubes require.
Is there any way to make an adapter to test these tubes on the likes of a TV7 or other similar tester?
I have 9 tubes in total and at least 4 have a good full area on the glass with getter and look new, another 2 look new but appear to have a smaller amount of getter on the glass, and one of them appears used and no getter visible on the glass, but not white.
Could be a fun project and they are pretty magnificent tubes to look at.
I would imagine they would need a beefy power supply to run at their maximum ratings, looks like these things could easily pull 100 watts out of a pair?
Doesnt seem to be an awful amount of designs published, but I would feel that running in class AB2 would be beneficial to reduce power consumption when idle.
Easier to lash up several power supply's, bench or quick tfmr, bridge rectifier + caps to test. A bog standard valve tester won't test them properly. I have several ex Tek 500 series scope tfmr's that are great for testing valves like these & some big bench supplies EG a 500v/3A jobby; if your looking at building amps with unusual valve types you need some mad test gear as datasheets are scarce.
Have fun, Andy.
Have fun, Andy.