How To Build a Great Audiophile Phono Preamp

Close up photo of the audiophile preamp circuit board

I began to haunt flea markets and old book and record stores looking for vinyl treasures. I still had a decent turntable, and had recently upgraded the cartridge, but my phono preamp was at least 10 years old and not the best to begin with. It sounded ok, but the next logical upgrade was a more serious audiophile phono preamp.

A Simple AM radio Battery Simulator

photo of Power supply with Battery and Power Meter

Restoring the Freshman Masterpiece AM radio was a lot of fun, but using batteries wasn’t. They’re convenient for testing, but expensive for regular use. The “B” battery alone uses ten 9-volt batteries, and that’s over $20 per set. There are battery simulators available for old tube radios, but they’re not cheap either, and where’s the fun in just buying a plug-in power supply? Wouldn’t it be cooler to use solar power and a 12-volt rechargeable battery?

Restoring the Freshman Masterpiece TRF Radio

photo of The Freshman "Masterpiece"

I mentioned finding two old 20’s-era broadcast receivers in an earlier post. Some months had passed, and restoring the Freshman Masterpiece “5F5” seemed like a fun project and a quick win. The radio was designed to run on two batteries: an “A” or 6-volt battery for the tube filaments and a “B” or 90-volt battery for the plate voltage.

Restoring a Classic 1937 Hallicrafters SX-16 Shortwave Receiver – A Start

photo of Hallicrafters SX-16 original condition

It’s been nearly two years since a pair of classic old shortwave receivers followed me home from California, and they have been staring at me each time I enter the shop ever since. Neither are functional, and both are daunting restoration projects. I wanted to revive some of my old vacuum tube chops and collect some vintage test equipment before diving into these beauties.

JBL 4408 Studio Monitors — Repairing the Woofer Foam Surrounds

photo of The studio in action

In a former life, I worked in professional audio sales and service for a local music store. This was about a million years ago, and the store, Musicmakers Austin, is long gone. I was just recently out of college and the modest pay didn’t matter too much because I was living every musician’s dream: working as a musician — or at least in close proximity to working musicians.