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I would replace them with a 12v warm white bayonet bulb. They’re commonly used as an automotive replacement. In doing so I would also remove the 100 ohm resistor as shown in the schematic and experiment with a much higher resistor to achieve your desired brightness. To be on the safe side I...
Gotta love those old analogue multimeters! They usually contain a selector inside that looks like something to be used in a high power antenna switch. Generally, that’s the first thing that goes bad in most modern day digital multimeters.
This is my final cleaned rendition. Unless the pages were wired together or had associated circuit boards, they were separated and orientated vertically for monitor viewing. Page 30 was missing.
I’ve been playing with my NOS Midland tester. It’s the one on right. As an example, I also included the photo of a Micronta meter. You will find a number of similar models with slight differences. Notice the batteries are still in the wrappers. While removing the back, a red tag fell out that...
I always scan in color at 600 DPI. Depending on the particular scanner or software driver, gray scale could possibly be something less than 256. Scanning in full color assures me that will never be an issue. To save on file size, the document is later converted to gray scale using a paint...
My ideal radio for truckers in particular, would have the capabilities of working on either Ch19 or some other UHF frequencies, along with some new antenna designs that will cover both. IMO It’s too tough to convince most buyers to purchase separate radios, but a single system will introduce...
This particular 3 digit LED was salvaged from an old Kidde Nighthawk carbon monoxide alarm. Most of these carbon monoxide alarms start to signal “error” after about 3 or 4 years and need to be replaced, but IMO the LED readout is worth saving for various projects. I modified the following...
The Hygain 3077 is the first version of the Hygain 7 series (crystal matrix board). Although they're similar, there's 3 of them. The 3107 is the latest 02A PLL version.
RV2 on page 2 of the pg21 - pg43 pdf is the modulation adjustment.
Be sure to make a note of all the screw locations and the...
Spot on! Be very careful if you decide to test for heat with your finger on that back transistor. I had a customer burn her finger while she was removing that Pace. We never sold those, but only had taken a few of them in for parts on a trade deal. I remember trying to modify one using the push...
I recently screen captured this CB radio from the movie “Death Race.” The Hallicrafters Littlefone CB-3A was a popular 8 channel radio made back in 1962. I recall repairing and wiring a D104 desk mic to one of these for a friend.
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