Jens Mosbergvik

Jens is a guitar-string slinger, Fender amp-oholic, and the proud and humble founder of fenderguru.com, where he goes into detail about vintage Fender amps. His day job as Director of Business Analysis at a large Nordic telecommunications company is way more boring than writing for Premier Guitar about the things he loves. He has a master’s degree in electronics and telecommunication systems from Norwegian University of Science and Technology, and plays with the bands Zofa and the Underbones. Connect with him at fenderguru.com.

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Jens Mosbergvik

My Surprising Journey with Vintage Fender Amps

Our columnist shares what he’s learned over a lifetime of amp ownership, mods, and more.

Fender Amp Primer: Deluxe Reverb and Princeton Reverb

To those classic American amp beginners, here’s the scoop on how two of the most popular models compare.

The Fender Bandmaster Through the Years

The Best Fender Amps That Never Existed

What if you could have the best of both—or multiple—worlds? Our columnist investigates.

How to "Trebleshoot" a Vintage Fender Amp

So You Want to Be a Vintage Fender Amp Handyman?

Here are a few tips to get you started on your way to becoming an old-school Fender amp tech.

Common Problems with Vintage Fender Amps (And How to Fix Them)

Vintage Fenders are some of the best-sounding amplifiers around, but from time to time, they need a bit of love to give up the goods. Here are the top issues you’ll encounter with your black- and silver-panel Fender amps, and how to fix them.

What Makes Vintage Fender Amps the Kings of Clean?

Our columnist breaks down why Leo’s original designs are still the benchmark for pristine guitar sounds.

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Jens Mosbergvik

Our columnist shares what he’s learned over a lifetime of amp ownership, mods, and more.

To those classic American amp beginners, here’s the scoop on how two of the most popular models compare.

What if you could have the best of both—or multiple—worlds? Our columnist investigates.

Here are a few tips to get you started on your way to becoming an old-school Fender amp tech.

Vintage Fenders are some of the best-sounding amplifiers around, but from time to time, they need a bit of love to give up the goods. Here are the top issues you’ll encounter with your black- and silver-panel Fender amps, and how to fix them.

Our columnist breaks down why Leo’s original designs are still the benchmark for pristine guitar sounds.