Hey Zach,
I was checking out some rummage sales with my wife and happened upon this National guitar amplifier. I suspect the family who was holding the sale didn’t know what they had as I picked it up for $50. It was an estate sale of various items, but this definitely stood out to me since I’m a recreational guitarist. Everything on the amp works, except that a few of the knobs make a scratching sound when turned back and forth. Can you affirm my suspicions that I found a deal?
Thanks,
Ned in Green Bay, Wisconsin
Hi Ned,
While I’m fairly confident you would get your $50 back (and then some) if you decided to sell this amp, let’s take a look at it first. National amps came from the same National brand of Dobro resonators, but the amp you have is hardly designed to be used for bluegrass. It’s a fitting brand name, however, since National’s resonator guitars represent some of the first forms of amplification.
National ventured into guitar amplification—sans electronics—when guitarist George Beauchamp approached John and Rudy Dopyera (the founders of National) with an idea on how to increase the volume of guitars that were getting lost in the large orchestras of the late 1920s. He suggested putting an aluminum resonator in the guitar body to help “resonate” the sound, which is where the name came from.
Modern amplifiers powered by electricity began to appear in the 1930s, thereby almost rendering the resonator obsolete for its intended purpose only a few years after it was introduced. However, resonators found a niche with bluegrass players and continue to be popular today.
National followed suit and introduced an electric amplifier in the 1930s called the National Dobro. Ownership of National then changed many times in the 1930s and early 1940s before Victor Smith, Al Frost, and Louis Dopyera partnered and changed the name of the company to Valco in 1943. Valco produced National amps, but they also built amplifiers and instruments for other distributors/suppliers under different names including Supro, Oahu, Gretsch, and Airline. It’s not uncommon to find the exact same amplifier produced under several different trademarks.
Your newly acquired Newport 50 is from National’s line of amplifiers introduced in the early 1960s, around the same time they released their unique Res-O-Glas electric guitars (one of which is also called a Newport). These amps were very attractive and instantly recognizable with their random-colored stitching and black covering combination, and light brown/gray grille. They were offered in many power levels with varying features and price points, so there was a National amp for just about everyone.
The Newport 50 falls in the middle of National’s lineup. Somewhat similar to the Fender Super in terms of power, speaker size, and features, the Newport 50 provided the intermediate guitarist with everything they should need in an amp. Specifications include 17 watts of power, dual 10" Jensen speakers, an 8-tube chassis with four 12AX7s and one 6973 for the preamp, two 6973s for the power amp, and a 5Y3 for the rectifier.
A visit to an amp tech for a re-tube and tune-up will have this classic back to like-new operation.
Other features include reverb and tremolo, and six knobs on the front panel consisting of individual volume and tone controls for each channel and controls to dial in reverb and tremolo intensity. There are four inputs (two per channel) located on the rear panel, along with a tremolo speed-control knob and inputs for the 2-button footswitch for the tremolo and reverb.
These amps were produced until about 1967 or 1968 when the entire line was replaced by a new and more powerful series. These new amps only lasted a year or two before Valco went out of business, and the National name ended up with Strum ’N Drum—an importer in Chicago without any manufacturing facilities. They offered one amp called the GA 950P, a solid-state model that effectively ended production of National amplifiers for good.
Being among the most recognizable and arguably the most popular National amplifiers, your amp represents one of the most valuable in terms of collectability. Currently, a National Newport 50 is worth between $800 and $1,000 in excellent condition. Since your amp likely sat for many years, it probably needs to be cleaned and tuned up. Potentiometer scratching is very common—especially in amps that have sat at length—and this can be remedied with some contact cleaner. If that doesn’t work, the pots can simply be replaced. For a few hundred bucks, you could get this amp re-tubed and cleaned so it operates like new.
Based on current value, I’d estimate you stand to make at least a $500 profit on your $50 investment if you get it tuned up. This is indeed a treasure for you, although the people that held the rummage sale might disagree!
Reverend Jetstream 390 Solidbody Electric Guitar - Midnight Black
Reverend Contender 290 Solidbody Electric Guitar - Midnight Black
Submarine Pickups boss Pete Roe at his workstation.
Still, we think we know what pickups should sound and look like. Lucky for us, there have always been plenty of pickup builders who aren’t so convinced. These are the makers who devised the ceramic-magnet pickup, gold-foils, and active, high-gain pickups. In 2025, nearly 100 years after the first pickup bestowed upon a humble lap-steel guitar the power to blast our ears with soundwaves, there’s no shortage of free-thinking, independent wire-winders coming up with new ways to translate vibrating steel strings into thrilling music.
Joe Naylor, Chris Mills, and Pete Roe are three of them. As the creative mind behind Reverend Guitars, Naylor developed the Railhammer pickup, which combines both rail and pole-piece design. Mills, in Pennsylvania, builds his own ZUZU guitars with wildly shaped, custom-designed pickups. And in the U.K., Roe developed his own line of hexaphonic pickups to achieve the ultimate in string separation and note definition. All three of them told us how they created their novel noisemakers.
Joe Naylor - Railhammer Pickups
Joe Naylor, pictured here, started designing Railhammers out of personal necessity: He needed a pickup that could handle both pristine cleans and crushing distortion back to back.
Like virtually all guitar players, Joe Naylor was on a personal tone quest. Based in Troy, Michigan, Naylor helped launch Reverend Guitars in 1996, and in the late ’90s, he was writing and playing music that involved both clean and distorted movements in one song. He liked his neck pickup for the clean parts, but it was too muddy for high-gain playing. He didn’t want to switch pickups, which would change the sound altogether.
He set out to design a neck pickup that could represent both ends of the spectrum with even fidelity. That led him to a unique design concept: a thin, steel rail under the three thicker, low-end strings, and three traditional pole pieces for the higher strings, both working with a bar magnet underneath. At just about a millimeter thick, rails, Naylor explains, only interact with a narrow section of the thicker strings, eliminating excess low-end information. Pole pieces, at about six millimeters in diameter, pick up a much wider and less focused window of the higher strings, which works to keep them fat and full. “If you go back and look at some of the early rail pickups—Bill Lawrence’s and things like that—the low end is very tight,” says Naylor. “It’s almost like your tone is being EQ’d perfectly, but it’s being done by the pickup itself.”
That idea formed the basis for Railhammer Pickups, which began official operations in 2012. Naylor built the first prototype in his basement, and it sounded great from the start, so he expanded the format to a bridge pickup. That worked out, too. “I decided, ‘Maybe I’m onto something here,’” says Naylor. Despite the additional engineering, Railhammers have remained passive pickups, with fairly conventional magnets—including alnico 5s and ceramics—wires, and structures. Naylor says this combines the clarity of active pickups with the “thick, organic tone” of passive pickups.
“It’s almost like your tone is being EQ’d perfectly, but it’s being done by the pickup itself.” —Joe Naylor
The biggest difficulty Naylor faced was in the physical construction of the pickups. He designed and ordered custom molds for the pickup’s bobbins, which cost a good chunk of money. But once those were in hand, the Railhammers didn’t need much fiddling. Despite their size differences, the rail and pole pieces produce level volume outputs for balanced response across all six strings.
Naylor’s formula has built a significant following among heavy-music players. Smashing Pumpkins’ Billy Corgan is a Railhammer player with several signature models; ditto Reeves Gabrels, the Cure guitarist and David Bowie collaborator. Bob Balch from Fu Manchu and Kyle Shutt from the Sword have signatures, too, and other players include Code Orange’s Reba Meyers, Gogol Bordello’s Boris Pelekh, and Voivod’s Dan “Chewy” Mongrain.
Chris Mills - ZUZU Pickups
When Chris Mills started building his own electric guitars, he decided to build his own components for them, too. He suspected that in the course of the market’s natural thinning of the product herd, plenty of exciting options had been left unrealized. He started working with non-traditional components and winding in non-traditional ways, which turned him on to the idea that things could be done differently. “I learned early on that there are all kinds of sonic worlds out there to be discovered,” says Mills.
Eventually, he zeroed in on the particular sound of a 5-way-switch Stratocaster in positions two and four: Something glassy and clear, but fatter and more dimensional. In Mills’ practice, “dimensional” refers to the varying and sometimes simultaneous sound qualities attained from, say, a finger pad versus a fingernail. “I didn’t want just one thing,” says Mills. “I wanted multiple things happening at once.”
Mills wanted something that split the difference between a humbucker’s fullness and the Strat’s plucky verve, all in clean contexts. But he didn’t want an active pickup; he wanted a passive, drop-in solution to maximize appeal. To achieve the end tone, Mills wired his bobbins in parallel to create “interposed signal processing,” a key piece of his patented design. “I found that when I [signal processed] both of them, I got too much of one particular quality, and I wanted that dimensionality that comes with two qualities simultaneously, so that was essential,” explains Mills.
Mills loved the sound of alnico 5 blade magnets, so he worked with a 3D modeling engineer to design plastic bobbins that could accommodate both the blades and the number of turns of wire he desired. This got granular—a millimeter taller, a millimeter wider—until they came out exactly right. Then came the struggle of fitting them into a humbucker cover. Some key advice from experts helped Mills save on space to make the squeeze happen.
Mills’ ZUZUbuckers don’t have the traditional pole pieces and screws of most humbuckers, so he uses the screw holes on the cover as “portholes” looking in on a luxe abalone design. And his patented “curved-coil” pickups feature a unique winding method to mix up the tonal profile while maintaining presence across all frequencies.
“I learned early on that there are all kinds of sonic worlds out there to be discovered.” —Chris Mills
Mills has also patented a single-coil pickup with a curved coil, which he developed to get a different tonal quality by changing the relative location of the poles to one another and to the bridge. Within that design is another patented design feature: reducing the number of turns at the bass end of the coil. “Pretty much every pickup maker suggests that you lower the bass end [of the pickup] to compensate for the fact that it's louder than the treble end,” says Mills. “That'll work, but doing so alters the quality and clarity of the bass end. My innovation enables you to keep the bass end up high toward the strings.”
Even Mills’ drop-in pickups tend to look fairly distinct, but his more custom designs, like his curved-coil pickup, are downright baroque. Because his designs don’t rely on typical pickup construction, there aren’t the usual visual cues, like screws popping out of a humbucker cover, or pole pieces on a single-coil pickup. (Mills does preserve a whiff of these ideals with “portholes” on his pickup covers that reveal that pickup below.) Currently, he’s excited by the abalone-shell finish inserts he’s loading on top of his ZUZUbuckers, which peek through the aforementioned portholes.
“It all comes down to the challenge that we face in this industry of having something that’s original and distinctive, and also knowing that with every choice you make, you risk alienating those who prefer a more traditional and familiar look,” says Mills.
Pete Roe - Submarine Pickups
Roe’s stick-on Submarine pickups give individual strings their own miniature pickup, each with discrete, siloed signals that can be manipulated on their own. Ever wanted to have a fuzz only on the treble strings, or an echo applied just to the low-register strings? Submarine can achieve that.
Pete Roe says that at the start, his limited amount of knowledge about guitar pickups was a kind of superpower. If he had known how hard it would be to get to where he is now, he likely wouldn’t have started. He also would’ve worked in a totally different way. But hindsight is 20/20.
Roe was working in singer-songwriter territory and looking to add some bass to his sound. He didn’t want to go down the looping path, so he stuck with octave pedals, but even these weren’t satisfactory for him. He started winding his own basic pickups, using drills, spools of wire, and magnets he’d bought off the internet. Like most other builders, he wanted to make passive pickups—he played lots of acoustic guitar, and his experiences trying to find last-minute replacement batteries for most acoustic pickups left him scarred.
Roe started building a multiphonic pickup: a unit with multiple discrete “pickups” within one housing. In traditional pickups, the vibration from the strings is converted into a voltage in the 6-string-wide coils of wire within the pickup. In multiphonic pickups, there are individual coils beneath each string. That means they’re quite tiny—Roe likens each coil to the size of a Tylenol pill. “Because you’re making stuff small, it actually works better because it’s not picking up signals from adjacent strings,” says Roe. “If you’ve got it set up correctly, there’s very, very little crosstalk.”
With his Submarine Pickups, Roe began by creating the flagship Submarine: a quick-stick pickup designed to isolate and enhance the signals of two strings. The SubPro and SubSix expanded the concept to true hexaphonic capability. Each string has a designated coil, which on the SubPro combine into four separate switchable outputs; the SubSix counts six outputs. The pickups use two mini output jacks, with triple-band male connectors to carry three signals each. Explains Roe: “If you had a two-channel output setup, you could have E, A, and D strings going to one side, and G, B, and E to the other. Or you could have E and A going to one, the middle two strings muted, and the B and E going to a different channel.” Each output has a 3-position switch, which toggles between one of two channels, or mute.
“I’m just saying there’s some unexplored territory at the beginning of the signal chain. If you start looking inside your guitar, then it opens up a world of opportunities.” —Pete Roe
This all might seem a little overly complicated, but Roe sees it as a simplification. He says when most people think about their sound, they see its origin in the guitar as fixed, only manipulatable later in the chain via pedals, amp settings, or speaker decisions. “I’m not saying that’s wrong,” says Roe. “I’m just saying there’s some unexplored territory at the beginning of the signal chain. If you start looking inside your guitar, then it opens up a world of opportunities which may or may not be useful to you. Our customers tend to be the ones who are curious and looking for something new that they can’t achieve in a different way.
“If each string has its own channel, you can start to get some really surprising effects by using those six channels as a group,” continues Roe. “You could pan the strings across the stereo field, which as an effect is really powerful. You suddenly have this really wide, panoramic guitar sound. But then when you start applying familiar effects to the strings in isolation, you can end up with some really surprising textural sounds that you just can’t achieve in any other way. You can get some very different sounds if you’re applying these distortions to strings in isolation. You can get that kind of lead guitar sound that sort of cuts through everything, this really pure, monophonic sound. That sounds very different because what you don’t get is this thing called intermodulation distortion, which is the muddiness, essentially, that you get from playing chords that are more complex than roots and fifths with a load of distortion.” And despite the powerful hardware, the pickups don’t require any soldering or labor. Using a “nanosuction” technology similar to what geckos possess, the pickups simply adhere to the guitar’s body. Submarine’s manuals provide clear instruction on how to rig up the pickups.
“An analogy I like to use is: Say you’re remixing a track,” explains Roe. “If you get the stems, you can actually do a much better job, because you can dig inside and see how the thing is put together. Essentially, Submarine is doing that to guitars. It’s allowing guitarists and producers to look inside the instrument and rebuild it from its constituent parts in new and exciting ways.”
Slayer guitarists Kerry King and Jeff Hanneman formed the original searing 6-string front line of the most brutal band in the land. Together, they created an aggressive mood of malcontent with high-velocity thrash riffs and screeching solos that’ll slice your speaker cones. The only way to create a band more brutal than Slayer would be to animate them, and that’s exactly what Metalocalypse (and Home Movies) creator Brendon Small did.
From his first listen, Small has been a lifetime devotee and thrash-metal expert, so we invited him to help us break down what makes Slayer so great. Together, we dissect King and Hanneman’s guitar styles and list their angriest, most brutal songs, as well as those that create a mood of general horribleness.
