Products > Test Equipment
Do you have any test equipment in your lab that uses vacuum tubes?
notfaded1:
I really like this guy I have:
Martin.M:
that is fine, yes :)
But:
Set it to 12 Volts or 15 Volts to feed any small transistor experiment,
Then press STANDBY and look what the voltage output will do before shutting down finally.. (a typical 30V Transistor will be RIP )
Heathkit made a bullshit there, it may be better to remove "Standby" and type there "WORST CASE SWITCH"
MarkL:
I have two pieces of test equipment that has vacuum tubes: A Heathkit IT-28 capacitor checker, and a Spellman 15kV @ 4mA HV supply. The Spellman has an interesting set of gas voltage regulator tubes in addition to the usual drivers and rectifier tubes. I've posted photos of it before:
https://www.eevblog.com/forum/chat/how-many-psu_s-do-you-have/msg393637/#msg393637
I'm still looking for a model ID or schematics if anyone recognizes it.
I also have a tube-powered (5514/811A) Tesla coil which is physically in my lab, but it's not really a piece of test equipment. It probably has no business being in there given the other sensitive electronics.
med6753:
--- Quote from: MarkL on September 10, 2019, 03:11:39 pm ---I have two pieces of test equipment that has vacuum tubes: A Heathkit IT-28 capacitor checker, and a Spellman 15kV @ 4mA HV supply. The Spellman has an interesting set of gas voltage regulator tubes in addition to the usual drivers and rectifier tubes. I've posted photos of it before:
https://www.eevblog.com/forum/chat/how-many-psu_s-do-you-have/msg393637/#msg393637
I'm still looking for a model ID or schematics if anyone recognizes it.
I also have a tube-powered (5514/811A) Tesla coil which is physically in my lab, but it's not really a piece of test equipment. It probably has no business being in there given the other sensitive electronics.
--- End quote ---
Judging from the photos you posted if those metal 6L6's are original I place that supply earlier than 1960. Perhaps early to mid 1950's. It does appear that the tube on the far right....probably a 5U4....has at some point been replaced. If original it would have had a glass envelope just like your 0A3 VR tubes.
med6753:
--- Quote from: Martin.M on September 10, 2019, 03:09:14 pm ---that is fine, yes :)
But:
Set it to 12 Volts or 15 Volts to feed any small transistor experiment,
Then press STANDBY and look what the voltage output will do before shutting down finally.. (a typical 30V Transistor will be RIP )
Heathkit made a bullshit there, it may be better to remove "Standby" and type there "WORST CASE SWITCH"
--- End quote ---
That may be true but that supply is poor choice for that application and is not meant for 12-15V equipment.
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