Well New PV Sys is running prefect. So what's up,I need a Isolation Transformer and variac well sort of! I am building one with 12v battery+750W PMW Inverter+ DROK Motor Control Board AC 110V 4000W Adjustable Voltage Regulator SCR High Power Controller+ Volt meter+dummy load, I Can add voltage to untested equipment with out blowing up house and myself some of these outputs are 600V Cost me $20.00 for DROK had all the rest just hanging around. Tell what you think. By the way it works I can pull 50v ac to test with no problems.
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Originally posted by Paul Land View PostWell New PV Sys is running prefect. So what's up,I need a Isolation Transformer and variac well sort of! I am building one with 12v battery+750W PMW Inverter+ DROK Motor Control Board AC 110V 4000W Adjustable Voltage Regulator SCR High Power Controller+ Volt meter+dummy load, I Can add voltage to untested equipment with out blowing up house and myself some of these outputs are 600V Cost me $20.00 for DROK had all the rest just hanging around. Tell what you think. By the way it works I can pull 50v ac to test with no problems.
I think its gibberish. But if your house is not on fire, I guess it works.
What you list is a bunch of brand names, and I have no idea of the actual function of the stuff. No commas, so I can't tell if you have a motor control board for 4000w or a 4000w regulator or dummy load. SCR's will generate a whole bunch of electronic noise. And you can't possibly get 4000w from any normal household circuit
Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-Lister -
Originally posted by Mike90250 View Post
> Tell what you think
I think its gibberish. But if your house is not on fire, I guess it works.
What you list is a bunch of brand names, and I have no idea of the actual function of the stuff. No commas, so I can't tell if you have a motor control board for 4000w or a 4000w regulator or dummy load. SCR's will generate a whole bunch of electronic noise. And you can't possibly get 4000w from any normal household circuitComment
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For testing old radios, a series wired light bulb socket, with a 100w bulb is a winner. The bulb is you current limiter, have a couple bulbs to swap in, and when you are happy, flip a switch to bypass the bulb and apply full power.
FuseSaver.jpg
Attached FilesPowerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-ListerComment
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I might apply B+ directly with a variable, current limiting supply, watching the A meter,
tubes cold while I turn it up.
Then I use the variac plugged into a watt meter. Bruce RoeComment
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Originally posted by Mike90250 View PostFor testing old radios, a series wired light bulb socket, with a 100w bulb is a winner. The bulb is you current limiter, have a couple bulbs to swap in, and when you are happy, flip a switch to bypass the bulb and apply full power.
FuseSaver.jpgComment
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Originally posted by bcroe View PostI might apply B+ directly with a variable, current limiting supply, watching the A meter,
tubes cold while I turn it up.
Then I use the variac plugged into a watt meter. Bruce RoeLast edited by Paul Land; 01-24-2019, 03:34 PM.Comment
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There is a lot of tube gear still around here, that is all there was when I started. Plenty of
Heathkit, I make some effort to keep everything operational. One thing I do NOT like is all
those zip cords, messy and dangerous. So most get converted to IEC modules, which can
provide the safety ground, convenient removable cord, fuse, and even lighted switch in one
module. Here is an example where a really messy internal AC arrangement was entirely
cleaned up for this high quality, still useful, but ancient unit.
I also try to have a pilot light on everything, either red on the panel or LEDs into the
meters. If I turn off the lab light and see no pilot lights, I know everything is off.
With patience, I have gotten a lot of variable transformers off Evil Bay. Bruce Roe
90651.JPGLast edited by bcroe; 01-24-2019, 03:47 PM.Comment
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