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Topics - Mads Barnkob

Pages: [1] 2 3 ... 11
1
I found a old and discarded smoke cannon at a scrap yard! It looked in rough shape, but still had some oil in its container. With a bit experimentation and at last forcefully feeding it oil, it gave off its smoke!

As a bonus, I got most of my workshop lubricated from half-burned oil smoke raining down droplets everywhere!

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2
A teardown of a 19" 1U server UPS, the APC SC450RMI1U UPS, a run down of the current paths in the system.

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Data on the unit: https://www.apc.com/shop/hr/en/products/APC-Smart-UPS-SC-450VA-230V-1U-Rackmount-Tower/P-SC450RMI1U

3
I am trying to clean out my workshop, so this will only be a link to my listings on a danish website for selling used technical stuff: https://ham.brugtgrej.dk/itemlist.php?mode=useritems&userid=2620

International shipping is in the range of 20-40€ for a 5-15kg package. So it's pretty fair for shipping large stuff.

Reply to this topic or send PM for € prices and shipping.


4
Vacuum Tube Tesla Coils (VTTC) / Kaizer VTTC 1
« on: February 23, 2024, 06:59:58 PM »
Technical walk-through and demonstration of spark generation from my first dual resonant Tesla coil. I finished this dual 811A vacuum tube Tesla Coil back in late 2008, which dates this back 15 years by now! At the time I finished this coil, my best camera at the time, could only record in 640x480 with horrible noise in dark surroundings. This video is the walk-through and demonstration video I wanted to make 15 years ago, but got done now :)

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All pictures and construction details can be found at: https://kaizerpowerelectronics.dk/tesla-coils/kaizer-vttc-i/







5
Laboratories, Equipment and Tools / ESAB Bantam TBH 140 Welder Restoration
« on: February 08, 2024, 06:47:35 PM »
I found a discarded welding machine in a scrap yard! It might be an older shielded metal arc welder, also known as SMAW or stick welder. But from what my father told me, these old ESAB machines are impossible to destroy. It got a good new home :)

Features me being very bad at welding!

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All pictures and specifications can be found at: https://kaizerpowerelectronics.dk/teslacoils/esab-bantam-tbh-140-welder-restoration/

Before




After

6
The Dell N870P power supply origins from the redundant PSU for the Dell Poweredge R710 / T610 rack servers. This post and video shows how to make it run standalone.

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The PCBs of this power supply is well documented with its silkscreen and modularly built with PFC front end, DC-DC converter and driver boards as extensions.



The backside of the main PCB reveals some specific areas of interest, for further analysis and hacking. Especially the OVP / Over Voltage Protection would be interesting.

The driver of the DC-DC output stage is a UCC3895. It is placed on its own extension board with 3 potentiometers for adjust output voltage and possible current limits.



Firstly I map out all the ground connected pins. Secondly I power up the power supply to look for standby voltages and housekeeping power supply rails. Thirdly I start out with a 100K resistor from ground to all unknown control pins, then move down to 10K and last 1K resistors to look for external power on signals. Repeat with +3.3, +5 or +12V auxiliary power supplies if nothing is found with the ground reference to input pins.


7
I bought two 750 mm long and 70 mm diameter plasma tubes from Barracuda Glass by Chris Burak. These lovely borosilicate glass tubes are filled with a mix of iodine, argon and krypton, for a bright blue glow. The Tesla coil used, is one of my first Tesla coils ever built. The Kaizer VTTC1: https://kaizerpowerelectronics.dk/tesla-coils/kaizer-vttc-i/

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Not a sponsored video!

8
General Chat / Merry Christmas and Happy New Year 2024
« on: December 21, 2023, 01:38:52 PM »
Merry Christmas and Happy New Year 2024 to all HVF users, subscribers of my channel and everyone in general!

April, 9 years old and Alfred, 5 years old assemble and solder a LED blinking Christmas tree. Kids love to build stuff and electronics should be no exception to them!


9
Electronic Circuits / ABB DCS400 - 900A / 522kW DC Motor Drive Teardown
« on: November 24, 2023, 07:33:46 PM »
Teardown of a ABB DCS401.0900 DC motor drive. It can output an insane 900A at variable voltages, for a maximum output power of 522 kW! A very modular design by ABB, that makes almost no difference on the 2- or 4-quadrant versions of this drive.

All pictures and some details at: https://kaizerpowerelectronics.dk/teardown/abb-dcs400-900a-522kw-dc-motor-drive-teardown/

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The interior design consists of 5 different function parts. Heat sink with fan. SCR bridge with busbars. SCR driver board. DC motor excitation coil control and a main controller board with network interface.




The large SCR bridge, of the ABB DCS400, consists of 3 Proton-Electrotex MT3-595-18-A half-bridge modules. Each SCR module is rated for 595A mean on-state current at 1600V. It can handle up to around 20kA surge on-state current at up to 10 ms! This bridge feeds the armature of the DC motor.




10
X-ray / Philips Medio 50 kW CP-H X-ray Control Desk Teardown
« on: November 12, 2023, 07:21:57 AM »
I found a complete Philips Medio 50 CP-H system consisting of 2 meter tall 19″ rack with computer, driver, inverter and high voltage tank. Dual X-ray tube head rated for 150 kV and a control desk. It was only possibly for me to take the control desk with me. No effort was done for the driver, inverter and high voltage tank, as it was from the 1990’s and SCR based inverter design.

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System origin date is 27th June 1992. The X-ray tube seems to be a separate delivery as its not mentioned in the shipping list of the system. The Tube housing assembly with 2 X-ray tubes is marked 150 kV.



The CPU of the Philips Medio 50 CP-H control desk is a Siemens SAB8085A, 8-bit microprocessor, running at 5 MHz, with serial in/out port and up to 64K RAM. All inputs and outputs are handled by three Calmos CA82C55A programmable peripheral interfaces. Communication between CPU and PPI is handled by a Philips SCN2651. It is a Programmable Communications Interface, running a internal serial bus at 19200 baud rate.


11
The Brandenburg Alpha Series II 5 kV Power Supply is from Great Britain and made in 1977. The model 2507r is specified for 500 to 5000 VDC at 5 mA, around 100 VA power rating.

I bought this Brandenburg Alpha Series II 5kV high voltage power supply from a University in France, cleaning out. I was lucky to spot this HV power supply among many pictures put up in a Facebook group called Vintage Electronic Test Equipment: https://www.facebook.com/groups/VintageElectronicTestEquipment.

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The mains input goes through an isolation transformer down to around 40-50 VDC. 2N3055 (at the back) and BDY91 transistors (with heat sinks inside) seems to make up the inverter to drive the high voltage flyback style transformer. The manual states that the drive frequency is around 33 kHz. The output of the flyback transformer goes to a large grey module, which is assumed to contain some kind of rectification and possible voltage multiplier. The manual shows that this is a 10 stage CW multiplier, made from BY182 diodes and 2 nF capacitors.





The output was tested with a Fluke 77 that can measure up to 1 kV.

12
Teardown of a Philips / Fujifilm PCR Eleva S x-ray image scanner / digitizer. Also known as Computerized Radiography (CR), it fulfills the job of scanning a x-ray exposed image plate with a laser beam and extract each pixel illumination with a photo multiplier tube setup. It can scan 78 plate per hour with a general resolution of 3520 x 4280 pixels in 12 bits per pixel gray scale.

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The system is built up on Altera Flex (EPF6016QC208-2N), Altera Cyclone (EP1C12Q240C8N) and Altera Max (EPM7128SQC160-10N) CPLDs. CPLD is a Complex Programmable Logic Devices and is a sort of device that is one step closer to the hardware layer, than a FPGA.



The stepper motor drivers are Sanyo STK672-050 packages. There is 4 identical stepper motors from SHINANO KENSHI, model STP-59D3002, with properties 1.1Ω 1.8°/step is certainly reuseable for other projects. The small diaphragm vacuum pump and DC gear motors can also come in handy for fun stuff.



The harddisk was destroyed with a hammer, while the PC was running. To my big surprise it actually took a while for Windows to realize that the drive was bend 45 degrees. I eventually had to command the machine to reboot in order to get it to trigger on a faulty harddisk.


13
Electronic Circuits / 3x400V Mains Supply Soft Start and Data Monitor
« on: August 26, 2023, 08:37:32 AM »
Construction of a 3 phase 32A 400VAC Soft Start Power Supply with safety features and a data monitor. All parts like enclosure, current transducers, voltage step down, contactors and wiring is reused from my 3 phase 13 A Lübcke variac build, that unfortunately had one of the auto transformers burn up.

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I wanted to reuse as many old components and parts, from my storage, as possible. Despite that the PMA Data Monitor KS4010 is quite old and slow, I figured it would still be good enough with its 6 analogue inputs and 125 ms sample rate. The only downside to that instrument, is the rather big size. Mostly due to the fact that it is hosting a 3½ floppy disk drive for saving measurements.

For the voltage measurements I used 400 VAC to 20 VAC step down transformers acquired on ebay and through a single diode and a resistor voltage divider getting it to a level that the data monitor can work with.

Back in 2015, I found the green and affordable AC RMS current transducers. They output a 0-5 VDC signal, which is within the range of the data monitor inputs.



Energizing the unit will light up the red lamp, indicating that it is not ready or is in soft start mode. For safety reasons, there is not a status light that can be trusted, other that all states indicate a powered and dangerous state. Using lamps to indicate powered and “dangerous” state, can lead to accidents, if the lamp is not lighting up when it should. Pressing the start button activates contactor Q3, that self-holds and turn on Q1. This also starts the count down timer that switches on Q2, which bridges out the soft start resistors.






14
Teardown of Cisco Cable TV EGC GAN node and drop amplifier. Electronic Gain Control (EGC) technology and GaN (Gallium Nitride) monolithic microwave integrated circuits (MMICs}.

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RF output level adjustable over a wide range: 94 to 119 dBµV
Wide optical input: -7 to +2 dBm, 1200-1600 nm wavelength.
Configurable for 1 GHz or 862 MHz operation
Configured by Electronic Gain Control (EGC) technology
Full segmentable in forward path and reverse path
Automatic redundancy switching for forward path

From the backbone network connected fiber TX module, the signal goes through a pSEMI PE4256 SPDT switch. Before the pre-amplifier, a Peregrine Semiconductor (pSemi) PE4304 75Ω RF digital attenuator, 6-bit, 32.5dB, DC-2GHz. The pre-amplifier is a Skyworks ACA2402, 750-1000 MHz 22 dB gain push-pull line amplifier. The output amplifier is a RFMD RFCM2680, 45-1003 MHz, power double amplifier. 450 mA at 24VDC, for a 22.5 dB gain. From here the copper cable network to the end-user, is connected.


15
Old electronics and expensive RF parts often contain a large amount of gold and other precious materials. I have seen a lot of gold recovery videos on youtube. I assume that you have seen the same. Some are handling everything correct, but truth is, with the dangerous and hazardous nature of the dust and chemicals, very few get it right. It is going to either hurt yourself or the environment, when you are not handling it according to all possible codes and restrictions.

When you realize just how much equipment, chemicals, protective gear and time that has to be invested in such a refinery. And we are not yet at the handling of the resulting waste.

Here I present you with a easy alternative to the above. Exporting the scrap to a precious metal recovery company and get money straight into your bank account. No risks for your own health or the environment. Safety around dangerous chemicals or machinery is not a joke!

Daily updated purchasing prices: https://www.precious-metal-services.com/information/current-purchase-prices/electronic-scrap/

Export papers: https://www.precious-metal-services.com/purchase/cover-letter/

Spreadsheet for calculating your collection: https://drive.google.com/file/d/193pGUvsgH2q5Rwv1pWtqSNAFnwG5oH60/view?usp=sharing

I am not affiliated with ESG and received nothing for this video, but ESG is more than welcome to contact me and send me a gold bar for it ;)

Part 1, sorting, weight and shipping. I expected to get around 410€.
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Part 2, looking at the detailed processing and payout. I got around 470€.
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16
General Chat / Privacy Policy
« on: July 23, 2023, 10:28:20 PM »
Who we are
Your privacy is very important to us. At Kaizer Power Electronics we have a few fundamental principles that we follow:

We don’t ask you for personal information unless we truly need it. (We can’t stand services that ask you for things like your gender or income level for no apparent reason.)

We don’t share your personal information with anyone except to comply with the law, develop our products, or protect our rights.

We don’t store personal information on our servers unless required for the on-going operation of our site.

Kaizer Power Electronics (“Kaizer Power Electronics”) operates several websites including kaizerpowerelectronics.dk, highvoltageforum.net and disorder.dk. It is Kaizer Power Electronics’s policy to respect your privacy regarding any information we may collect while operating our websites.

Company information about Kaizer Power Electronics can be found at the About page.

Website Visitors
Like most website operators, Kaizer Power Electronics collects non-personally-identifying information of the sort that web browsers and servers typically make available, such as the browser type, language preference, referring site, and the date and time of each visitor request. Kaizer Power Electronics’s purpose in collecting non-personally identifying information is to better understand how Kaizer Power Electronics’s visitors use its website. From time to time, Kaizer Power Electronics may release non-personally-identifying information in the aggregate, e.g., by publishing a report on trends in the usage of its website.

Kaizer Power Electronics also collects potentially personally-identifying information like Internet Protocol (IP) addresses for logged in users and for users leaving comments on our blogs. Kaizer Power Electronics only discloses logged in user and commenter IP addresses under the same circumstances that it uses and discloses personally-identifying information as described below, except that blog commenter IP addresses are visible and disclosed to the administrators of the blog where the comment was left.

Gathering of Personally-Identifying Information
Certain visitors to Kaizer Power Electronics’s websites choose to interact with Kaizer Power Electronics in ways that require Kaizer Power Electronics to gather personally-identifying information. The amount and type of information that Kaizer Power Electronics gathers depends on the nature of the interaction. For example, we ask visitors who comment on our blog to provide a username and email address. Those who wish to receive Kaizer Power Electronics updates via email, we collect their emails. In each case, Kaizer Power Electronics collects such information only insofar as is necessary or appropriate to fulfill the purpose of the visitor’s interaction with Kaizer Power Electronics. Kaizer Power Electronics does not disclose personally-identifying information other than as described below. And visitors can always refuse to supply personally-identifying information, with the caveat that it may prevent them from engaging in certain website-related activities.

Aggregated Statistics
Kaizer Power Electronics may collect statistics about the behavior of visitors to its websites. For instance, Kaizer Power Electronics may monitor the most popular pages on the kaizerpowerelectronics.dk site or use spam screened by the Akismet service to help identify spam. Kaizer Power Electronics may display this information publicly or provide it to others. However, Kaizer Power Electronics does not disclose personally-identifying information other than as described below.

Protection of Certain Personally-Identifying Information
Kaizer Power Electronics discloses potentially personally-identifying and personally-identifying information only to those of its employees, contractors and affiliated organizations that (i) need to know that information in order to process it on Kaizer Power Electronics’s behalf or to provide services available at Kaizer Power Electronics’s websites, and (ii) that have agreed not to disclose it to others. Some of those employees, contractors and affiliated organizations may be located outside of your home country; by using Kaizer Power Electronics’s websites, you consent to the transfer of such information to them. Kaizer Power Electronics will not rent or sell potentially personally-identifying and personally-identifying information to anyone. Other than to its employees, contractors and affiliated organizations, as described above, Kaizer Power Electronics discloses potentially personally-identifying and personally-identifying information only in response to a subpoena, court order or other governmental request, or when Kaizer Power Electronics believes in good faith that disclosure is reasonably necessary to protect the property or rights of Kaizer Power Electronics, third parties or the public at large. If you are a registered user of an Kaizer Power Electronics website and have supplied your email address, Kaizer Power Electronics may occasionally send you an email to tell you about new features, solicit your feedback, or just keep you up to date with what’s going on with Kaizer Power Electronics and our products. We primarily use our various product blogs to communicate this type of information, so we expect to keep this type of email to a minimum. If you send us a request (for example via a support email or via one of our feedback mechanisms), we reserve the right to publish it in order to help us clarify or respond to your request or to help us support other users. Kaizer Power Electronics takes all measures reasonably necessary to protect against the unauthorized access, use, alteration or destruction of potentially personally-identifying and personally-identifying information.

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17
Electronic Circuits / 10 kW Sirio 10000P Solar Inverter Teardown
« on: June 04, 2023, 01:20:51 PM »
Teardown of a Sirio 10000P solar inverter designed in Italy and made in Taiwan. A extremely heavy and well built power house. Full of TO-264 sized IGBTs and a giant single PCB layout for the inverters.

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The inverter is still available from the manufacturer, Aros solar technology. I found it to be very heavy and hard to handle, with its 37 kg in a enclosure that measures 444 x 151 x 584 mm.



The solar panel to DC link inverter uses 3 legs of 2 Fairchild FGL40N120 IGBTs in parallel and a Fairchild RHRG75120 ultra fast diode . This is from the 3 solar panel array strings. The output inverter uses 3 legs of 4 Fairchild FGL40N120 IGBTs in parallel. This is for a 3 phase output of 400 VAC 50 Hz. Thirdly the DC link consists of 2x6 Nippon Chemi-con 450V 680 uF electrolytic capacitors in parallel, for a total of 4080 uF at 900V.





18
This Sedecal SHF-330, with HF meaning High Frequency, was originally a 37.5 kW x-ray high voltage generator. It later received an upgrade, to a Sedecal SHF-530, which is a 50 kW 500mA x-ray high voltage generator.

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This x-ray generator comes in 3 different versions. This one is the line powered version, drawing all power directly from mains, 20-50 kW. Capacitor assisted drawing most power from a capacitor bank, and power directly from mains, when charged up, is 2.2 kW. Battery supplied unit that needs a recharge, but can operate completely free of mains supply for a given amount of pictures taken.

The system construction is very similar between small and large, and old and new systems. This is typical for medical systems, as making a proven and tested system, that gets validated for medical use, can be very time consuming and thus expensive.




The HT Controller A-3000-10 uses primarily ADC and 74HCxx logic ICs and a single 40-pin DIP microcontroller running at 10 MHz.



The Semikron SKKD 40F10 double diode modules, are great for any kind fo rectifier bridge, with their 1000V and 40A rating. The Mitsubishi PM300DSA120 IGBT power modules are a CM300 brick with built-in protection and driver circuit. This unfortunately also limits it to a 20 kHz drive frequency, which is unsuitable for Tesla coil inverters.



19
A guide on how to make the, Artesyn 7001138 IBM 24R2730, server power supply run outside of its server enclosure.

This video also goes through how I generally reverse-engineer power supply interfaces of server power supplies.

To reverse-engineer a power supply interface by trial-and-error, finding the GND pads and connecting them to other pads through a 1K or 10K resistor is a safe way to probe for possible start up conditions.

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A simple bridge between pin 13 and 15 is required.


20
A guide on how to make the, ACBEL FSA021 IBM 39Y7228, server power supply run outside of its server enclosure.

This video also goes through how I generally reverse-engineer power supply interfaces of server power supplies.

To reverse-engineer a power supply interface by trial-and-error, finding the GND pads and connecting them to other pads through a 1K or 10K resistor is a safe way to probe for possible start up conditions.

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A simple bridge between pin 1 and 2 is required.



VR200 - Unknown function
VR201 - Voltage out adjustment
VR202 - Limiter, needs power cycle if tripped

Pages: [1] 2 3 ... 11

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[Voltage Multipliers]
Alberto
March 23, 2024, 04:34:31 PM
post Re: capacitor and diodes. Voltage values for a CW
[Voltage Multipliers]
MRMILSTAR
March 23, 2024, 03:04:25 PM
post Re: capacitor and diodes. Voltage values for a CW
[Voltage Multipliers]
Alberto
March 23, 2024, 01:38:34 PM
post Re: capacitor and diodes. Voltage values for a CW
[Voltage Multipliers]
MRMILSTAR
March 23, 2024, 04:20:03 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
davekni
March 23, 2024, 12:54:30 AM
post Re: Smoke Screen Machine Protect 950 XP - Teardown of a Smoke Cannon!
[Electronic Circuits]
davekni
March 23, 2024, 12:05:57 AM
post capacitor and diodes. Voltage values for a CW
[Voltage Multipliers]
Alberto
March 22, 2024, 11:45:03 PM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
OmGigaTron
March 22, 2024, 11:30:09 PM
post Smoke Screen Machine Protect 950 XP - Teardown of a Smoke Cannon!
[Electronic Circuits]
Mads Barnkob
March 22, 2024, 10:20:35 PM
post Re: Where's all this voltage coming from?
[Spark Gap Tesla Coils (SGTC)]
Benbmw
March 22, 2024, 09:21:13 PM
post Re: What actually kills MOSFETs?
[Beginners]
AstRii
March 22, 2024, 03:37:11 PM
post What actually kills MOSFETs?
[Beginners]
FPS
March 22, 2024, 05:09:20 AM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
March 22, 2024, 03:57:54 AM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
March 22, 2024, 02:59:25 AM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
March 21, 2024, 06:31:42 PM
post Re: 2x Panasonic Inverter Microwaves - what to salvage, dangers?
[General Chat]
rikkitikkitavi
March 21, 2024, 03:08:01 PM
post Re: [WTS] IGBT, Ferrite, Capacitors, Tools, PSU, Industrial components and parts
[Sell / Buy / Trade]
Mads Barnkob
March 21, 2024, 01:37:32 PM
post Re: Difference between these transformers
[Transformer (Ferrite Core)]
Alberto
March 21, 2024, 11:42:07 AM
post Re: Phase Lead Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
March 21, 2024, 04:09:14 AM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
March 21, 2024, 02:15:31 AM
post My Homemade Structural Analysis X-Ray Machine
[X-ray]
Luca c.
March 21, 2024, 01:35:40 AM
post Re: Phase Lead Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Saattvik24
March 20, 2024, 10:40:00 PM
post Re: Difference between these transformers
[Transformer (Ferrite Core)]
Mads Barnkob
March 20, 2024, 08:03:41 PM
post Re: 2x Panasonic Inverter Microwaves - what to salvage, dangers?
[General Chat]
Mads Barnkob
March 20, 2024, 07:51:57 PM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
March 20, 2024, 10:39:47 AM
post Re: Phase Lead Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
March 20, 2024, 04:09:59 AM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
March 20, 2024, 01:13:23 AM
post Re: Phase Lead Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Keybored
March 20, 2024, 12:45:16 AM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
March 20, 2024, 12:30:30 AM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
March 19, 2024, 11:12:24 PM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Late
March 19, 2024, 09:47:49 PM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Late
March 19, 2024, 09:44:19 PM
post Phase Lead Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Saattvik24
March 19, 2024, 06:52:09 PM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
March 19, 2024, 05:02:44 PM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
Mads Barnkob
March 19, 2024, 05:01:41 PM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
March 19, 2024, 04:31:02 PM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
March 19, 2024, 03:59:54 PM
post Re: Benjamin's DRSSTC 2 in progress
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
March 19, 2024, 06:41:39 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
davekni
March 19, 2024, 04:05:49 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
OmGigaTron
March 18, 2024, 09:08:35 PM
post Re: Can I Trust This Super Cheap Site?
[General Chat]
2020-Man
March 18, 2024, 09:07:35 PM
post Re: Can I Trust This Super Cheap Site?
[General Chat]
Twospoons
March 18, 2024, 08:57:06 PM
post Re: Can I Trust This Super Cheap Site?
[General Chat]
MRMILSTAR
March 18, 2024, 03:51:33 PM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Late
March 18, 2024, 02:59:46 PM
post Re: 160mm DRSSTC II project | Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Late
March 18, 2024, 02:33:25 PM
post Can I Trust This Super Cheap Site?
[General Chat]
2020-Man
March 18, 2024, 11:02:12 AM
post Re: Where's all this voltage coming from?
[Spark Gap Tesla Coils (SGTC)]
Twospoons
March 18, 2024, 02:36:11 AM
post Re: Best forum for vacuum tube amplifiers?
[General Chat]
Mads Barnkob
March 17, 2024, 07:42:55 PM
post Re: 2x Panasonic Inverter Microwaves - what to salvage, dangers?
[General Chat]
Michelle_
March 17, 2024, 04:15:14 PM
post Re: 2x Panasonic Inverter Microwaves - what to salvage, dangers?
[General Chat]
Michelle_
March 17, 2024, 05:05:04 AM
post Re: Where's all this voltage coming from?
[Spark Gap Tesla Coils (SGTC)]
davekni
March 17, 2024, 04:50:51 AM
post Re: 2x Panasonic Inverter Microwaves - what to salvage, dangers?
[General Chat]
Twospoons
March 17, 2024, 04:45:17 AM
post 2x Panasonic Inverter Microwaves - what to salvage, dangers?
[General Chat]
Michelle_
March 17, 2024, 04:17:51 AM
post Where's all this voltage coming from?
[Spark Gap Tesla Coils (SGTC)]
Terry
March 17, 2024, 01:29:32 AM
post Re: DRSSTC Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
March 17, 2024, 12:33:06 AM
post Re: DRSSTC Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Keybored
March 16, 2024, 08:46:20 PM
post Re: Bleeder resistor for MMC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Hydron
March 16, 2024, 08:39:24 PM
post Re: DRSSTC Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Hydron
March 16, 2024, 08:21:44 PM
post Best forum for vacuum tube amplifiers?
[General Chat]
yourboi
March 16, 2024, 08:20:13 PM

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