Dr. Scott M. Baker

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Category: Electronics Projects

DIY Variable AC Power Supply

November 29, 2015
by admin in Electronics Projects

I build a 0-30V adjustable AC power supply for the bench using a Variac, 28 VAC transformer, a digital panel meter, and a handful of other support components.

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Pilotuner T601 FM Tube Tuner Restoration

November 29, 2015
by admin in Electronics Projects

I restore a Pilotuner T601 FM tuner. This is an interesting piece of history, as it’s one of the earliest FM tuners. It doesn’t even have an amplifier and is designed to be attached to an existing radio or receiver.

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Hantek T3100 scope probes unboxing and review

November 29, 2015
by admin in Electronics Projects

I evaluate some Hantek T3100 oscilloscope probes. These are x100 probes, that I bought for using on high-voltage projects, such as tube radios.

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Ebay VCO module evaluation

November 29, 2015
by admin in Electronics Projects

I ordered some cheap VCO modules from eBay. Only $20, using an MC1648 VCO oscillator chip, and they work from 70Mhz to 200Mhz.

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LM2576 constant voltage / constant current switching power supply

October 19, 2015
by admin in Electronics Projects

I design an adjustable voltage / adjustable current limit power supply using an LM2576 buck converter. For the current limit function, I use an op-amp to measure the current from a sense resistor, a second op-amp to compare that to a pot, and then feed that signal back into the feedback pin.

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DIY RF Signal Generator

October 13, 2015
by admin in Electronics Projects

I build an RF signal generator from an article in Nuts and Volts. I learned many things about RF circuits during this project, and the blog post details some of the lessons.

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Learning to use the GALI-55 MMIC

September 8, 2015
by admin in Electronics Projects

I didn’t know what the heck I was doing when I tried to use a GALI-55 MMIC in my RF signal generator. A few basic mistakes led to hours of diagnosing the problem.

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My new KG-650 RF Signal Generator

June 4, 2015
by admin in Electronics Projects

I bought an old tube RF generator on eBay. It works surprising well considering the age of the technology. I use my Rigol scope to view some of the waveforms and play with the RF generator a bit.

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Categories

Newer Posts in Electronics Projects

Older Posts in Electronics Projects

Recent Posts in All Categories

  • Restoring a vintage Intel Prompt 80 8080 microcomputer trainer / development system
  • Setting up an iRMX86 operating system on a multibus 86/30 vintage computer
  • Restoring a Teleram Portabubble/81 vintage bubble memory computer
  • Vintage Industrial Multibus Computer Becomes a Nixie Tube Clock
  • Designing a TMS5220 Speech Synthesizer Multimodule
  • Multibus and the MDS-80 Series II with Homebuilt IO Controller using Raspberry Pi.
  • Ciro Mazzoni Baby Loop Ham Radio Antenna, an in-depth review
  • Can an AI program your Vintage Computer for you?
  • Adding bubble memory to an iPDS-100 Personal Development System / Cloning the iPDS-120 Multimodule Adapter
  • Master Blaster: An 8008 Supercomputer.
  • Building a DIY Jupiter Ace Computer and Expansion Modules for it
  • Vintage Speech Synthesizers
  • 80186 16-bit CPU runs MS-DOS on the Heathkit H8 Computer
  • Olivetti M20 Upgrades, Tips, Tricks, and New Boards
  • The Mini-08 8008 Single Board Computer

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