Wurlitzer 145 (1962–late 1960s)

Name: Wurlitzer 145
Brand: Wurlitzer

That chimey bark is not a Rhodes. It's the rare, tube-driven Wurlitzer 145, the only one with tremolo and a hum at 60Hz.

Overview

Plenty of people have heard a Wurlitzer cut through a '60s soul track with that sharp, snarling bark. The 145 is part of that lineage, but it went a different way. Most vintage Wurlitzers people know, like the 200, run on solid-state guts. The 145 is full tube, and the sound is warm and slightly unruly. It was introduced in 1962 as the tube-powered sibling to the solid-state 140. It came as part of a complete overhaul of Wurlitzer's portable electric piano line, with a cleaner cabinet and a reworked mechanical action replacing the older designs. It didn't last long, but it picked up a cult following among players who wanted portability and tone with texture.

The 145 isn’t just a tube version of the 140; it’s the only tube-powered Wurlitzer portable with tremolo, a feature that gives it a pulsing, warbly depth you don’t get on later models. That tremolo isn’t subtle—it’s baked into the amplifier’s lean circuit using one of the triodes in the 6K11 triple-triode preamp tube, a rare Compactron type that’s been out of production for decades. That alone makes the 145 a collector’s puzzle: when that tube fails, you’re either hunting for NOS stock or installing a modern replacement amp that swaps in two 12AX7s. But for purists, that 6K11 is part of the magic—a component that, along with the 7868 output tubes, gives the 145 its “classic tube amp warmth” and a “unique character” that owners still rave about.

It's also one of the rarest Wurlitzers. The 140 and 200 were built in bigger numbers, while the 145 was phased out quickly. Production ended several years before the 140B, and by the late '60s Wurlitzer had shifted to the solid-state 200. Seeing a 145 in the wild is a minor event, and finding one in working condition is rarer still. Owners report sticky keys, sluggish action, and amplifiers that hum more than they should. These are common issues, and none of them is a dealbreaker if you're willing to get into the chassis with a soldering iron.

You will be in there. The 145 is electromechanical through and through: 64 keys, each triggering a felt hammer to strike a metal reed, with the vibration picked up by an electrostatic system running at 170 V DC. The design is elegant and fragile. Debris between reed and pickup can cause distortion bursts, and broken reeds from metal fatigue are a known issue. When it's dialed in, the sound is "bell-like clean," with a "warm, rich tone" that turns "edgy and rough" when you dig in. It's not a Rhodes. Wurlitzer's bark is sharper, closer to a sawtooth wave, with a punch that cuts through any mix.

Specifications

Manufacturer	Wurlitzer
Product type	Electric Piano
Production years	Released in the 1960s. The 145 model (non-"A", non-"B") was introduced in 1962.
Synthesis type	Electromechanical
Keyboard	64 keys
Polyphony	Full
Amplifier type	Tube amplifier
Amplifier preamp tube	6K11 triple triode
Amplifier output tubes	Two 7868 tubes
Amplifier rectifier tube	A 6CA4 tube
Speaker size	6x9” oval
Speaker output impedance	4 ohm
Original speaker output connector	RCA plug
Power transformer primary	120VAC/60Hz
Effects	Tremolo

Key Features

Electromechanical Sound Engine

The 145 makes sound the old-school way. A felt hammer strikes a metal reed, just like a piano, the reed vibrates, and an electrostatic pickup system running at 170 V DC converts that motion into an electrical signal. The concept is simple, but it's finicky in practice. Debris between reed and pickup can cause shorts and distortion, and reeds can break from fatigue over time. When it works, the tone is immediate and expressive - sweet and vibraphone-like when played gently, aggressive and barking when hit hard. The 64-key keyboard offers full polyphony and a weighted action that feels "tactile and responsive," though not as deep as a Rhodes. Some players note the key travel is short and the touch lighter, which takes adjustment if you're used to heavier actions.

Tremolo Circuit with 6K11 Tube

The 145 is the only tube-powered Wurlitzer portable with tremolo. The effect is built into the amplifier using one triode of the 6K11 triple-triode preamp tube. The circuit is lean by design: one triode for gain, one for phase inversion, one for tremolo. That reflects Wurlitzer's cost-cutting approach to amp design. The tremolo has a fixed rate but adjustable depth. It isn't subtle and it isn't clean. It's part of the amp's personality, along with the slight hum and noise floor that come from carbon composition resistors and early tube practices. Some tone-seekers love that hum. Others see it as a flaw to be fixed.

Tube Amplifier with Point-to-Point Wiring

The 145's amplifier is utilitarian design. It's built with minimal components and point-to-point wiring, it's "extremely utilitarian," and it's meant to fit snugly in the back of the cabinet. It runs hot, uses high voltages, and crowds the chassis with parts - no star ground, no neat routing. The filament wiring is "loosely and inconsistently twisted," and grounding is spread across at least eight points on the chassis. But it works. The amp uses two 7868 output tubes and a 6CA4 rectifier, and owners describe the warm, full sound as "tube love." The original RCA plug connects the internal 4-ohm 6x9" oval speaker, and the volume pot doubles as the power switch. It comes from an era when best practices were still being figured out, and it shows.

Reed and Action Revisions Across 145, 145A, 145B

The mechanical action of the 145 went through revisions, leading to the 145A and 145B models. The differences are mostly in the action: key feel, regulation, and reed compatibility. The earliest 145 (non-A, non-B) has a unique bass range, and its reeds aren't interchangeable with earlier or later models. Notes from 21 up match the style 120 reeds. The 145A, possibly released in late 1963 or by August 1964, used a new reed gauge not compatible with earlier versions. The 145B, likely from 1965 or 1966, was the final portable tube model, sold until early 1968. On 145A models, the reed screw and washer tend to crack and buzz, a known weak point. Parts aren't always interchangeable, so buyers need to know which variant they're getting.

Historical Context

The Wurlitzer 145, along with the solid-state 140 and tube console 720, was introduced in 1962 as part of a total redesign of Wurlitzer's electronic piano line. The goal was to modernize the cabinet, overhaul the mechanical action, and offer both tube and solid-state options. The portables were originally designed for classroom use, but they were quickly adopted for live performance. The 145 was the tube counterpart to the 140, while the 720 was a wooden console version. The 145A followed possibly in late 1963, and the 145B came later, around 1965-1966. The tube line was short-lived. The 145 was quickly discontinued, with production ending years before the 140B. By the late '60s, Wurlitzer had moved on to the solid-state 200. Conceptually, the 145 competed with the Rhodes piano, though its sharper, more aggressive tone set it apart.

Collectibility & Value

The Wurlitzer 145 is one of the rarest models in the line - "a rare model," "one of the rarest Wurlitzers." That scarcity drives interest, and it also brings complications. The obsolete 6K11 Compactron tube is no longer manufactured, so NOS tubes are a finite resource. Many owners opt for replacement amplifiers that use two 12AX7s instead, a mod that improves reliability and adds an extra triode. Rebuild kits are available for the original amp, costing around $210, and include replacements for failing components like filter capacitors, carbon composition resistors, and power supply resistors. Working on the amp requires caution. High voltages are present, and safe installation demands experience.

Common problems include amplifier hum (often 60Hz), noisy output, sticky keys, sluggish action, and leaking filter capacitors. Water damage, mildew smell, and paint chipping are also reported. A listing from 10 years ago showed a 145 selling for $2,500 plus $300 shipping, but current market value isn't well documented. A working 145 is "tonally valuable," maybe even "ephemeral." Expect to spend time and money on restoration.