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Improved Dim Bulb Tester Current Limiting Test Fixture with Bulb Preheat Feature

  • May 23, 2023 at 4:58 pm
Improved_Dim_Bulb_Tester_Current_Limiting_Test_Fixture_with_Bulb_Preheat_Feature_01_eb
Improved Dim Bulb Tester Current Limiting Test Fixture with Bulb Preheat Feature
Improved Dim Bulb Tester Current Limiting Test Fixture with Bulb Preheat Feature
Improved Dim Bulb Tester Current Limiting Test Fixture with Bulb Preheat Feature
Improved Dim Bulb Tester Current Limiting Test Fixture with Bulb Preheat Feature
Improved Dim Bulb Tester Current Limiting Test Fixture with Bulb Preheat Feature
Improved Dim Bulb Tester Current Limiting Test Fixture with Bulb Preheat Feature

Improved Dim Bulb Tester Current Limiting Test Fixture with Bulb Preheat Feature
This Dim Bulb (Dimbulb) Guitar Amp Current Limiting Test Fixture is now available in 3 models and each model comes with an 11 watt incandescent starter bulb (a low power 11 watt bulb is helpful for reforming capacitors in amps that haven’t been powered up for 6 months or longer), a 60 watt medium power incandescent bulb, and a 150 watt high power incandescent bulb. The video included with the pictures shows the 3 amp box – the 5 amp box works identical to the 3 amp box (except it can handle more current) and the dual range box is a new item (newly released May 8, 2023) and I will be making a video for it soon. A Dimbulb Current Limiting Test Fixture is a helpful tool during testing of guitar amplifiers and other electronic equipment by safely powering up the equipment by limiting the current through an incandescent light bulb (the bulb must be an incandescent, LED and other bulb types will not work properly) This box is available in a 3 amp version, a 5 amp version, and a dual range 1&5 amp version; the 3 amp version has a 3 amp meter and a 3 amp circuit breaker, the 5 amp version has a 5 amp meter and a 5 amp circuit breaker, and the dual range has a 5 amp circuit breaker and both a 1 amp and a 5 amp ammeters; when the dual range box is switched to the 1 amp meter the current is limited to slightly under 1 amp by the 100 watt bulb. This box takes away all the guesswork by showing you the exact voltage and current that the amplifier is receiving. The problem with most Dim Bulb Current Limiting Test Boxes is that they apply power to the amp while the bulb is cold while the bulb has a very low resistance which allows a huge current flow, which pretty much completely eliminates the entire point of the Dim Bulb box; the bulb must be hot for the device to work properly. I also sell an economy Dim Bulb Current Limiting Test Cable that is just two bulbs, which is better than nothing, but to get full protection and have the Dim Bulb circuit function as intended there just be a bulb preheat feature. Once it has been determined that there is no dead short in the amp (a bright light indicates a short and the amp needs to be repaired, a dim light indicates all systems normal) the bulb limiting feature can be switched out (to DIRECT/BYPASS) so that the amp gets full direct voltage while the current can be monitored on the meter The current meter is on at all times and even measures the current of the bulb while in PREHEAT mode. The boxes have a cover on the back and come with a standard power cord and 3 bulbs: a low power 11 watt incandescent bulb to use as a low current starter bulb to reform filter capacitors that haven’t been powered on for 6 months or longer, a medium power 60 watt incandescent bulb, and a 150 watt high power incandescent bulb. The box is 9.5″ wide x 5″ tall without bulb (or bulbs) x 3 deep. All wiring and soldered by hand. The new dual range test box allows more precise current measurements to be made by having a high resolution 1 amp meter – once tests are completed with 1 amp meter (100 watt bulb max) the test box can be switched over to the 5 amp meter which is connected to the high power bulb. I will be making a video highlighting the additional features of the dual range box soon. Reforming Filter Capacitors with the Dimbulb Tester: NOTE: A Dimbulb Tester ONLY works with an INCANDESCENT bulb. With the Dimbulb Tester OFF, insert an 11 watt bulb and set the middle toggle switch: BULB LIMITING / DIRECT/BYPASS to the up position to BULB LIMITING and set the TEST AMP / PREHEAT BULB on the right toggle switch to the down position to PREHEAT BULB. Plug the amp being tested into the output of the Dimbulb Tester box and turn the amp on; if the amp has a standby switch don’t use it – leave the amp turned on. Verify that the amp is turned on, the box is in BULB LIMITING (middle toggle switch up), and PREHEAT BULB mode (right toggle switch down). Turn on the Dimbulb box – the bulb will glow full brightness (an 11 watt incandescent bulb isn’t very bright). The middle toggle switch stays up in the BULB LIMITING position until the end of the test. Switch the right toggle switch up from PREHEAT BULB to TEST AMP. The right meter AMPLIFIER VOLTAGE should bump up a hair – continue either way, but always pay attention to both meters. The 11 watt bulb will limit the current to the amp so the voltage going to the amp will be low, the AMPLIFIER VOLTAGE meter will typically read around 10 volts. Starting with a bulb with a wattage as low as 11 watts is extremely helpful if an amp has been unpowered for a long period of time; it allows the filter caps to reform gently without a huge current spike. Turn off the DB box, change the bulb from 11 watts to 60 watts, and repeat: Verify that the amp is turned on, the box is in BULB LIMITING (middle toggle switch up), and PREHEAT BULB mode (right toggle switch down). As you increase the wattage of the bulb the voltage going to the amp should continue going up – if the AMPLIFIER VOLTAGE stays near zero and the AMPLIFIER CURRENT is moving above zero then the amp has a problem that would ordinarily blow the fuse. If desired an amp can be tested with as many incandescent bulbs as you want to: 11 watt, 25, watt, 40 watt, 60 watt, 100 watt, 200 watt, just start with the lowest wattage and work your way up. If you are using the new dual range box then the 1 amp meter should not be used with higher than a 100 watt bulb but the 5 amp box can accommodate any bulb up to 600 watts. The dual range test fixture also has a spare bulb socket to safely store whichever bulb is currently being unused. This item is in the category “Business & Industrial\Test, Measurement & Inspection\Test Meters & Detectors\Other Test Meters & Detectors”. The seller is “saugusmark” and is located in this country: US. This item can be shipped to United States, New Zealand, Fiji, Papua New Guinea, Wallis and Futuna, Gambia, Malaysia, Taiwan, Poland, Oman, Suriname, United Arab Emirates, Kenya, Argentina, Guinea-Bissau, Armenia, Uzbekistan, Bhutan, Senegal, Togo, Ireland, Qatar, Burundi, Netherlands, Slovakia, Slovenia, Equatorial Guinea, Thailand, Aruba, Sweden, Iceland, Macedonia, Belgium, Israel, Liechtenstein, Kuwait, Benin, Algeria, Antigua and Barbuda, Swaziland, Italy, Tanzania, Pakistan, Burkina Faso, Panama, Singapore, Kyrgyzstan, Switzerland, Djibouti, Chile, China, Mali, Botswana, Republic of Croatia, Cambodia, Indonesia, Portugal, Tajikistan, Vietnam, Malta, Cayman Islands, Paraguay, Saint Helena, Cyprus, Seychelles, Rwanda, Bangladesh, Australia, Austria, Sri Lanka, Gabon Republic, Zimbabwe, Bulgaria, Czech Republic, Norway, Côte d’Ivoire (Ivory Coast), Kiribati, Turkmenistan, Grenada, Greece, Haiti, Greenland, Yemen, Afghanistan, Montenegro, Mongolia, Nepal, Bahamas, Bahrain, United Kingdom, Bosnia and Herzegovina, Hungary, Angola, Western Samoa, France, Mozambique, Namibia, Peru, Denmark, Guatemala, Solomon Islands, Vatican City State, Sierra Leone, Nauru, Anguilla, El Salvador, Dominican Republic, Cameroon, Guyana, Azerbaijan Republic, Macau, Georgia, Tonga, San Marino, Eritrea, Saint Kitts-Nevis, Morocco, Saint Vincent and the Grenadines, Mauritania, Belize, Philippines, Democratic Republic of the Congo, Republic of the Congo, Colombia, Spain, Estonia, Bermuda, Montserrat, Zambia, South Korea, Vanuatu, Ecuador, Albania, Ethiopia, Monaco, Niger, Laos, Ghana, Cape Verde Islands, Moldova, Madagascar, Saint Pierre and Miquelon, Lebanon, Liberia, Bolivia, Maldives, Gibraltar, Hong Kong, Central African Republic, Lesotho, Nigeria, Mauritius, Saint Lucia, Jordan, Guinea, Canada, Turks and Caicos Islands, Chad, Andorra, Romania, Costa Rica, India, Mexico, Serbia, Kazakhstan, Saudi Arabia, Japan, Lithuania, Trinidad and Tobago, Malawi, Nicaragua, Finland, Tunisia, Uganda, Luxembourg, Brazil, Turkey, Germany, Egypt, Latvia, Jamaica, South Africa, Brunei Darussalam, Honduras.
  • MPN: Dual Range Version
  • Brand: Dim Bulb
  • Type: Dim Bulb Tester
  • Country/Region of Manufacture: United States

Improved Dim Bulb Tester Current Limiting Test Fixture with Bulb Preheat Feature

Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37

  • March 25, 2021 at 7:18 am
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Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37
Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37
Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37
Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37
Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37
Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37
Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37
Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37
Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37
Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37
Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37
Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37

Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37
We have for sale a vintage untested tube tester. This came from an avid ham radio operator estate. This is out of his shop. We try to be absolutely honest in everything we sell and represent. I can tell you that this has not been tested. I did plug it in and the red pilot light does come on. Thats as much as I can tell you. Here is the facts that I can give you on this unit. The probe wires that come with this are in rough condition. The outer casing of the wire is cracked and one end is missing. That will need to be repaired or replaced. The cord to plug it in appears to be in very good vintage condition. As stated, when I do plug it in, the red pilot light comes on like it should. All of the knobs appear to be there. It looks to be clean and whoever used it looks like they did take care of it. Some of the nameplates do you show wear. As far as the case, I did notice the latches are missing a couple of screws, but still function properly. The handle is nice and secure and the lid closes just like it should. With the lid shut, this case measures approximately 14 x 13 x 6. On the bottom, the rubber feet are still intact just like they should be. It does have four holes drilled in the bottom of the case. Not sure what those were for. I went ahead and took out the small screws that hold the unit into the wood case to see what was rattling. Two things I found. A machine screw nut and a strip of wood that must be used for support somehow. It measures 8-7/8 x 1/2 x 3/8. I will include both those pieces. I went ahead and reinstalled all the screws and put it back together and lo and behold it still has a rattle to it. Not sure, I just want to make sure youre aware of it. I believe this unit is way too nice to just part out. This would make a really nice restoration project for somebody. Maybe it works just as it is and you can use that way. This does come from a non-smoking estate. Please look at all 12 pictures closely for details, thanks for looking! STORE POLICIES: We strive to accurately list everything and we acquire our items from fine estate sales. We are not experts on all items we have listed. We are constantly on “the hunt” for exciting things to pass on to you. We take pride in every piece. Items are inventoried and stored in a clean and smoke-free environment. In every title, you will find a number in parentheses. This is for our inventory control only. We always try to select items from estate sales that are also clean and smoke-free. Customer service is top priority for us and we want our customers happy! We cannot correct a problem if we do not know about it. With some items we may be double boxing just to do everything we can to get the product to you unbroken. Search the help feature on how you change your address. The item “Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37″ is in sale since Wednesday, January 27, 2021. This item is in the category “Business & Industrial\Test, Measurement & Inspection\Testers & Calibrators\Tube Testers”. The seller is “vintagevisuals1982″ and is located in Lincoln, Nebraska. This item can be shipped to United States, Canada, United Kingdom, Germany, Japan, France, Australia, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South Korea, Indonesia, Taiwan, South africa, Belgium, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.
  • Model: EV-10
  • Modified Item: No
  • Country/Region of Manufacture: United States
  • Custom Bundle: No
  • MPN: EV-10
  • Brand: Precision

Precision EV-10 Vacuum Tube Multi Range Tester Vintage Wood Case EV10 Untested37

PR-8V Sonic Tester / Audio Gauge, Range in Steel 0.025 9.999 inches

  • December 2, 2019 at 11:48 am
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PR-8V Sonic Tester / Audio Gauge, Range in Steel 0.025 9.999 inches

PR-8V Sonic Tester / Audio Gauge, Range in Steel 0.025 9.999 inches
The Checkline PR-8V Sonic Tester / Audio Gauge, Range in Steel: 0.63 to 254 millimeters / 0.025 – 9.999 inches is designed specifically for the needs of engine builders and race shops. The time-based B-Scan feature of the PR-8V displays a cross section of the opposite surface, allowing engine builders the ability to see the contour of the back surface in cylinders while scanning. Use the Multi-Mode (Echo-Echo mode) feature to measure chassis tubing with or without paint and coatings. Built-in automatic gain control. Selectable low, medium, and high gain settings offer the inspector the additional punch power for materials that are hard to penetrate. The variety of calibration options is just one more example of the PR-8V’s versatility. Store up to 64 custom setups. Factory setups available for common applications. The internal Data Logger of the PR-8V has been customized for both the engine builder and the chassis inspector. Selectable cylinder mapping or general alpha numeric file storage will satisfy your reporting needs. Built-in transducer types offer increased linearity between transducers. The Fast Scan feature provides a better representation during the scanning process, by making 32 measurements per second. Remove the transducer from the test material to display the thinnest measurement found. Use the visual and audible alarm to set Hi and Lo limits to signal the inspector when the measurements are out of tolerance. The PR-8V also comes complete with our Windows PC software for transferring data to and from a PC, and viewing B-Scans, Cylinder Maps, and general measurements. Thickness Gauge for engine builders and race shops. Measures cylinder wall thickness, deck height, chassis tubing & more. Selectable transducer types with built-in dual path error correction for improved linearity. Fast-Scan Mode: Takes 32 readings per second and displays the minimum reading found when the transducer is removed. 001 inches (0.01mm). /ms – 1250 to 9999 meters/sec. Pulse-Echo (flaws, pits) – Echo-Echo (thru-paint). Dual Element (1 to 10 MHz). 16 megabit non-volatile ram. 12,000 pages with 1 reading and waveform per page. Three 1.5V alkaline or 1.2V NiCad AA cells. Typically operates for 150 hours on alkaline and 100 hours on NiCad. If idle 5 min. VGA grayscale display 62 x 45.7mm. Membrane switch with twelve tactile keys. Extruded aluminum body with nickel-plated aluminum end caps (gasket sealed). 14° to 140°F (-10° to 60°C). 63.5 W x 165 H x 31.5 D mm. CE Approved, Factory calibration traceable to national standards. The item “PR-8V Sonic Tester / Audio Gauge, Range in Steel 0.025 9.999 inches” is in sale since Wednesday, May 22, 2013. This item is in the category “Business & Industrial\Test, Measurement & Inspection\Test Meters & Detectors\Sound Level Meters”. The seller is “abq-ndt” and is located in Tomball, Texas. This item can be shipped to United States, Canada, United Kingdom, China, Mexico, Germany, Japan, Brazil, France, Australia, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South Korea, Indonesia, South africa, Thailand, Belgium, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Panama, Jamaica, Bolivia, Ecuador, Cayman islands, Oman, Peru, Paraguay, Viet nam, Uruguay.
  • MPN: PR-8V
  • Manufacturer: Checkline
  • Country of Manufacture: United States
  • Brand: Checkline

PR-8V Sonic Tester / Audio Gauge, Range in Steel 0.025 9.999 inches

PR-82 Sonic Tester, Range in Steel 0.63 to 199.99 mm / 0.040 to 1.50 in

  • July 21, 2019 at 8:52 am
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PR-82 Sonic Tester, Range in Steel 0.63 to 199.99 mm / 0.040 to 1.50 in

PR-82 Sonic Tester, Range in Steel 0.63 to 199.99 mm / 0.040 to 1.50 in
The Checkline PR-82 Sonic Tester, Range in Steel: 0.63 to 199.99 mm / 0.040 to 1.50 in is the first affordable Sonic Tester, utilizing state-of-the-art digital technology to produce fast and accurate readings. It requires no special training to operate. Unlike calipers, the PR-82 will measure where there is access to only one side. This makes it valuable when measuring roll cage thickness, cylinder walls (before and after boring) and heads during porting. The PR-82 measures in two modes. The first mode takes a measurement at the point you place the probe. The second is the Scan mode, which is helpful when measuring cylinder walls and roll cages. Place the probe at the bottom of the cylinder and drag it to the top, the gauge will display the thinnest reading measured. The Checkline PR-82 Sonic Tester, Range in Steel: 0.63 to 199.99 mm / 0.040 to 1.50 in is a lightweight, rugged tool that is resistant to water and oil. Other features include a backlit LCD and a bar graph to indicate signal stability. Four readings per second for single point measurements or 16 per second in SCAN mode. Fast-Scan Mode: Takes 32 readings per second and displays the minimum reading found when the transducer is removed. Measures cylinder wall thickness, deck height, chassis tubing & more. Cylinder’s & Pitting, Head Ports & Pipe, Roll Cages, Body Panels, Chasis, Variety of Applications. Measures from 0.040 to 1.50 inches (0.63 to 199.99 millimeters) in casted materials. 001 inches (0.01mm). /ms – 1250 to 9999 meters/sec. Dual Element (1 to 10 MHz). Two 1.5V alkaline or 1.2V NiCad AA cells. Typically operates for 200 hours on alkaline and 130 hours on NiCad. If idle 5 min. Multi-function 4.5 digit liquid crystal display with 0.500 inch numerals, backlit for use in poor light conditions. Sealed membrane that is resistant to both water and petroleum products. Extruded aluminum body with nickel-plated aluminum end caps (gasket sealed). 20 to 120F (-20 to 50C). 2.5 W x 4.5 H x 1.24 D inches. CE Approved, Factory calibration traceable to national standards. The item “PR-82 Sonic Tester, Range in Steel 0.63 to 199.99 mm / 0.040 to 1.50 in” is in sale since Wednesday, May 22, 2013. This item is in the category “Business & Industrial\Test, Measurement & Inspection\Test Meters & Detectors\Sound Level Meters”. The seller is “abq-ndt” and is located in Tomball, Texas. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Colombia, Panama, Jamaica, Bahamas, Viet nam, Uruguay, Brazil, Bolivia, Ecuador, Cayman islands, Oman, Peru, Paraguay.
  • MPN: PR-82
  • Manufacturer: Checkline
  • Country of Manufacture: United States
  • Brand: Checkline

PR-82 Sonic Tester, Range in Steel 0.63 to 199.99 mm / 0.040 to 1.50 in