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28 Questions

Views Newest Activity Votes

votes

answers

views

Does a solenoid valve allow continuous run-time for very long durations?

solenoid-valve

Jul 6 at 22:40 Kenneth Slabotsky 1

votes

answers

views

Why are bulky SCR power controllers used when the same can be achieved with a relay?

Nov 14 '17 at 8:59 Transistor 91.6k

votes

answers

views

Is it okay to connect a European 240V transformer to a US 240V outlet?

ac transformer

Oct 31 '17 at 0:30 Harper 7,012

votes

answers

views

Do we need any kind of protection for AC relay coil?

ac diodes relay

Nov 12 '17 at 16:19 Michael S. 11

votes

answers

views

How is the 220V line in US different from other parts of world? Does a US 220V line need two switches for each wire?

Oct 30 '17 at 12:54 The_Vintage_Collector 643

votes

answers

15k

views

Does a circuit breaker trip depending on voltage or current?

ac mains circuit-breaker

May 5 '17 at 9:04 Manjeet Malik 1

votes

answer

114

views

Using a vintage button bulb saver be used for CFL or halogen lamps?

incandescent

Mar 20 at 14:19 Rob Niosi 11

votes

answer

views

How much current is drawn by an 18,600 BTU A/C compressor during free run?

power amperage

Jun 29 at 21:30 abu_bua 304

votes

answer

503

views

How much length of nichrome wire needs to be adjusted to mod a 220V toaster to run on 115V?

ac heat

Dec 1 '17 at 19:02 Olin Lathrop 285k

votes

answer

views

What could be this particular thermometer used for?

thermostat electric

Nov 24 '17 at 21:31 Ale..chenski 30.4k

votes

answer

views

How far does reforming a capacitor help? Does it have any adverse effect on using such a capacitor on components?

electrolytic-capacitor dielectric

Oct 8 at 20:31 Robert Endl 1,807

votes

answer

141

views

Can this 1000W ballast be wired for 240V and plugged to 120V to run a 400W MH Lamp?

inductor light ballast

Sep 15 at 12:58 The_Vintage_Collector 643

vote

answers

views

What is the use of SENSE + and - in a PSU?

power-supply ac dc

May 31 '18 at 13:25 JohnM 1

vote

answer

202

views

Is this SLA battery still usable?

batteries

Nov 8 '17 at 19:34 Neil_UK 80.8k

vote

answer

535

views

How does using a 60Hz device on a 50Hz supply affect it?

ac frequency

Oct 28 '17 at 8:07 The_Vintage_Collector 643

votes

answers

views

Heathkit IP-27 bench PSU min. stays at 0.18V and there is a +0.1V for all the readings?

power-supply voltage current calibration

Jan 15 at 6:44 The_Vintage_Collector 643

votes

answer

views

Modify a 1629 magic eye tube circuit to a 6E5S tube?

voltage capacitor vacuum-tube

Oct 13 at 21:14 Dave Tweed♦ 126k

votes

answer

views

Is it okay to run a Mercury Vapor Lamp of lower wattage (100/150/175W) on a 400W MHL/MVL ballast? Also can a 60Hz ballast be used in 50Hz?

frequency watts ballast

Sep 9 at 7:42 The_Vintage_Collector 643

votes

answer

views

Is it normal for the OC2 vacuum tubes to glow bright orange during operation & OA2 to flicker while running?

capacitor oscilloscope vacuum-tube

Aug 14 at 0:09 DrMoishe Pippik 916

votes

answers

146

views

Is the thermostat in a room heater meant for room temperature control or for heater protection?

heat

Dec 9 '17 at 13:01 user287001 10k

votes

answer

235

views

What type of electronics soldering is this soldering flux used for?

soldering flux

Nov 17 '17 at 19:57 Neil_UK 80.8k

votes

answers

views

Why are Nickel Iron batteries expensive, less manufactured and not researched much?

lead-acid battery-chemistry

Nov 7 '17 at 20:18 The_Vintage_Collector 643

votes

answers

204

views

How are RC brushless motors able to handle very high current draws?

dc brushless-dc-motor

Nov 5 '17 at 20:10 Charles Cowie 22.3k

votes

answers

736

views

How does the power consumption and cooling capacity of a Peltier refrigerator change when the interior is made reflective?

efficiency peltier cooling

Nov 4 '17 at 10:44 The_Vintage_Collector 643

votes

answer

views

Replacing the selenium rectifier in a vintage car battery charger

battery-charging bridge-rectifier

Aug 15 '17 at 10:17 Janka 8,970

votes

answer

351

views

Is it safe to use a 120V 300W 60Hz UPS in a country with 240V 50HZ after step down with regular 1000W transformer?

ac frequency ups

Jun 11 '17 at 13:35 Transistor 91.6k

votes

answers

273

views

Can I connect two 6V 25W bulbs in series to a 12V supply?

light series incandescent

May 10 '17 at 19:50 Peter Green 12.3k

-1

votes

answer

141

views

Does anyone have any idea what this device might be?

identification test-equipment

Nov 20 '17 at 18:16 Kevin Reid 5,621

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28 Questions

Does a solenoid valve allow continuous run-time for very long durations?

Why are bulky SCR power controllers used when the same can be achieved with a relay?

Is it okay to connect a European 240V transformer to a US 240V outlet?

Do we need any kind of protection for AC relay coil?

How is the 220V line in US different from other parts of world? Does a US 220V line need two switches for each wire?

Does a circuit breaker trip depending on voltage or current?

Using a vintage button bulb saver be used for CFL or halogen lamps?

How much current is drawn by an 18,600 BTU A/C compressor during free run?

How much length of nichrome wire needs to be adjusted to mod a 220V toaster to run on 115V?

What could be this particular thermometer used for?

How far does reforming a capacitor help? Does it have any adverse effect on using such a capacitor on components?

Can this 1000W ballast be wired for 240V and plugged to 120V to run a 400W MH Lamp?

What is the use of SENSE + and - in a PSU?

Is this SLA battery still usable?

How does using a 60Hz device on a 50Hz supply affect it?

Heathkit IP-27 bench PSU min. stays at 0.18V and there is a +0.1V for all the readings?

Modify a 1629 magic eye tube circuit to a 6E5S tube?

Is it okay to run a Mercury Vapor Lamp of lower wattage (100/150/175W) on a 400W MHL/MVL ballast? Also can a 60Hz ballast be used in 50Hz?

Is it normal for the OC2 vacuum tubes to glow bright orange during operation & OA2 to flicker while running?

Is the thermostat in a room heater meant for room temperature control or for heater protection?

What type of electronics soldering is this soldering flux used for?

Why are Nickel Iron batteries expensive, less manufactured and not researched much?

How are RC brushless motors able to handle very high current draws?

How does the power consumption and cooling capacity of a Peltier refrigerator change when the interior is made reflective?

Replacing the selenium rectifier in a vintage car battery charger

Is it safe to use a 120V 300W 60Hz UPS in a country with 240V 50HZ after step down with regular 1000W transformer?

Can I connect two 6V 25W bulbs in series to a 12V supply?

Does anyone have any idea what this device might be?