Vintage 1960's Guyatone GA-530A Guitar Amplifier

Japanese-made tube amps from the 60’s represent, in general, one of the great values left in the vintage market. Frequently, you can pick up little combos like this Guyatone (or the Univox U-45B) for under $300. Real vintage tube tone for under $300 (and frequently even lower)? What’s not to love?

This Guyatone, along with coming cheaply and sounding great, is a looker. In white Tolex (or Tolex-like material), this is a stunning looking amp that was a popular model (though not for export) in the Mid-60’s Japanese “Group Sounds” movement. A great amp for chiming Beatles-inspired sounds or tremolo-drenched surf-styled instrumentals, the GA-530A is one to keep your eyes peeled for. It’s a classy looking amp, and one that probably looked just fine gracing the stage of the 60’s Japanese TV show Kachinuki Eleki Gassen (“Electric Guitar Tournament”—a highly-rated audience-participation guitar show…something of a Ventures-inspired proto-American Idol for guitar players—guitars were HUGE in the 60’s in Japan).

Vintage 1960's Guyatone GA-530A Guitar Amplifier

What’s under the hood? It’s a pretty simple and well-made amp. Three 12AU7’s (for preamp, tremolo and phase inverter duties), two EL84’s for output and a solid state rectifier and not much else. The speaker is labeled “Guyatone”, though I’m not sure if it was made by Guyatone or rebranded (there are no codes on it). Whatever its source, this is a sweet-sounding ALNICO speaker in the 20-watt range.

Vintage 1960's Guyatone GA-530A Guitar Amplifier

The sound of the amp is very cool and unique. Where most of the Univoxs I’ve heard are little blues and garage-rock machines, this amp is all about chime and cleans. Part of this, of course, comes from the low-gain 12AU7’s. A 12AX7 has, for instance, an amplification factor of 100. The 12AU7’s have an amplification factor of 17. The amp is voiced for cleans and isn’t (as you might guess from the tube line up) the loudest dual EL84 amp you’ll ever hear. Without mods, you can heat things up a bit with a 12AT7 in the preamp, but anything much higher than that makes it start oscillating and wailing a bit. Without some mods, it’s not going to be a high (or even mid) gain amp.

Vintage 1960's Guyatone GA-530A Guitar Amplifier

However, played clean (which it stays until about 7 on the volume knob), this thing really shines and sparkles. Byrds and Beatle type tunes sound incredible and it takes to a 12-string really well. Chords are articulate and well-voiced and the amp rings like a bell. Pushed into overdrive (from 7-10 on the volume), and the amp retains its trebly voice, but pushes the EL84’s into a Vox-like chime and grind (albeit at a lower overall volume than, say, an AC15).

And, while this combo may lack reverb for true surf tones, it’s got the awesome gritty sparkle to base your surf tone on, along with an absolutely KILLER tremolo. With tremendous range of depth and speed, it’s a very musical tremolo effect. One of the best I’ve heard in ANY amp. Add a ‘verb pedal, and you’re catching a wave!

Vintage 1960's Guyatone GA-530A Guitar Amplifier

Issues? Well, you are going to have a few when you buy a mid 60’s amp for under two hundred bucks. First of all, unless you know how to do relatively simple work like cap jobs and basic trouble-shooting for bad resistors and so on, the trip to the tech could cost more than the amp is worth. So, it’s probably not a great deal unless you know some basic repair and maintenance.

AND, there is a design flaw on this amp. The tubes are not mounted separately on the chassis, as they should be, but, instead, they’re mounted on the printed circuit board. This is problematic for a few reasons—the main ones being that it’s not nearly as study or durable as the proper mounting on the chassis and that it’s much easier for microphonic issues to arise (whether from the tube or the circuit board and then amplified through the tube).

Vintage 1960's Guyatone GA-530A Guitar Amplifier

Also, it’s not nearly as easy to modify a printed circuit board amp as it is on a hand-stuffed circuit board or a point-to-point amp. And you might want to modify this model for a little more gain on the preamp, via a nice 12AX7, pushing the rest of the signal down the chain. Or add a bypass cap to fatten up the sound. Both of these are still easy mods—just not quite as easy as if it were a point-to-point amp with a lot of space to be noodling around in the chassis.

Still, you want perfect for under two hundred clams? These are great-sounding, great looking little tone machines. And while the build quality may not equal Fender or Marshall (or even Univox), they are still pretty easy to fix and modify, and you can’t beat a little 12” combo with two EL84’s jangling and grinding for this kind of price. The Guyatone GA-530A is worth checking out—if you can find one!

Vintage 1960’s Guyatone GA-530A Guitar Amplifier from MyRareGuitars.com

Among the best deals out there are the Japanese-made Univox tube amps of the mid to late 60’s. There are some rare birds out there that are worth keeping an eye open for, but the one you see most often, among the low-priced, great sounding Univox tube amps, is the U-45B Model.

1960's Univox Guitar Amplifier

This is a small, incredibly light, and super simple and easy to work on amp that has a great garage and blues tone all its own. What’s not to love? And, while it does employ some oddball tubes, they are readily available and not at all expensive like some of the less common tubes from 1960’s amplifiers.

So, what’s going on with the U-45B? It actually has a lot to recommend it beyond some of the other cheaper vintage amps. The cabinet is solid, and the baffle is made of plywood, unlike, say the cheesy pressboard in an otherwise great amp like the Danelectro-made Silvertone 1482. So, you’ve got, in the U-45B, a fine Jensen 12” speaker that fits tightly and without rattle against some nice solid wood. A nice surprise in a cheapy. Also, the tolex (or whatever tolex-like material is used) on the later, front-controlled version of the U-45B is pretty durable, unlike some of the nice colored paper you might get on some Valco and Dano products.

The tube line up of the amp is the rather unusual 12AX7, 6BM8, 6BM8, 6X4. It’s rated at 10 watts. The 6X4 is an easy to find rectifier. What’s odd about this amp is that the 12AX7 isn’t used as a preamp tube but, rather, as the tremolo tube. The less common 6BM8s are used as both preamp and output tubes.

1960's Univox Guitar Amplifier

The control panel (on the top in early 60’s versions, on the front in later models—otherwise, they are the same amp) is about as simple as it gets. VOLUME. TONE and SPEED (for the tremolo, which has a nice deep set depth).

How does it sound? Well, pretty great. You can get some very fine clean tones when the volume is under half way, from a jazzy laid-back tone, to a twangy rockabilly sound. It’s great for recording. A quiet, smooth sounding amp on its clean settings, but where it really comes alive is when it’s pushed into overdrive. At 10 watts, with a 15 watt Jensen 12”, it really excels for recording rock guitar or for a quiet(er) jam with full-throttle tone. It’s around 15 lbs, yet it’s built solidly and it sounds great. It’s an amp you want, and you can find them, with stunning regularity, for under $250…frequently for a good deal less.

1960's Univox Guitar Amplifier

The tremolo is rich, with a nice range of speeds. The only possible downside to the amp? It has a rather dark voice which offers plenty of sparkle while using a Tele, but it can muddy up a bit with a darker voiced guitar like, say, a Supro Dual Tone. An easy, non-mod fix for this? Any boost pedal gives it plenty of sparkle. (My home-made OC71 Germanium boost gives it a rich, harmonic sparkly push…awesome). But if you want to totally retain the tone of the amp and the voice of the guitar, use a simple EQ pedal, and you can dial in a little more treble, while keeping the basic character of the amp.

This is a great amp. It was also (with the exact same components from the same factory) marketed/labeled as a Lafayette, a Cavalier—and also marketed by the Hilgen brand under the model name Meteor. Most Hilgens I’ve seen (hardly a scientific sampling, but, still…) were made in New Jersey, but, for a time, the company apparently imported SOME of their amps, and the one I’ve seen the most of, among the imported Hilgens, is their Meteor branded amp that is the same, guts-wise, as the Univox U-45B.

So why haven’t these caught on in the vintage market? Who cares, but why not take advantage of it while they’re still cheap?

Next month—more on some of the even more rare Univox’s, like the U305 with the 15” speaker, or some of the more rare 2X10” amps with 6973 output tubes and more! Meanwhile, search away.

Rob’s Crazy eBay Finds: 1960’s Univox Amps from MyRareGuitars.com