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HomeHi-Fi EquipmentAmplifiers CS Port Monaural Power Amplifier 212PA Power Amplifier
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CS Port Monaural Power Amplifier 212PA Power Amplifier

£75,000.00

A large-sized triode vacuum tube “212E”
Price includes a pair of amplifiers

212E is a large triode with a plate loss of 275W developed by Western Electric in the 1910’s as a transmission tube and modulating tube, and is a sphere suitable for audio applications operating with negative bias unlike the later developed transmission tube. The 4212E was produced in the 1960s and 1970s under the license of STC by Western licenses. Since STC4212E is becoming a rare variety, we have two types with one equipped with 212E of Jinzhou Huawei Optoelectronic Tube. * STC4212E is second hand.

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Drive low-efficiency speakers with margin. Output 40W
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Categories: Amplifiers, Hi-Fi Equipment Tags: CS Port, Power Amplifier
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Description

CS Port Monaural Power Amplifier 212PA Power Amplifier

Large 3-electrode tube 212E mounted

This is a large triode with a plate loss of 275W in a transmitting tube and a modulating tube. A class-A single tube amplifier has a small output and is difficult to drive low-efficiency speakers, but this unit is a full-fledged amplifier that operates at a plate voltage of 1,400V and drives at a 40W output. It also suppresses the output to gain a damping factor of 5 or more and reliably drives the low frequencies as well.

* Western licensed STC4212E from the 1960s to the 70s and equipped with Nishikyushu photoelectron tube 212E

Two-step configuration with an ultra-high confidence tube C3g

Equipped with ultra-reliable pentode C3g developed by Deutsche Telekom for telephone repeaters. Since the grid line is thin and the distance between electrodes is large, voltage amplification with high linearity is possible. This unit is composed of only two amplifier tubes with 212E, which suppresses harmonic and mixed modulation distortion while providing no feedback.

High fidelity input transformer

In the two-stage amplification, the insufficient gain is produced by the input transformer. A high-linearity transformer using a high-permeability super-malloy core that passes through micro-signals without adding any extra material.
* Because the input impedance is as low as 1.5kΩ, drive with a device with an output impedance of 300 Ω or less.

Noise suppression at the contact point

Many contact points in the amplifier are the source of noise due to the rectifying action at the micro level. (The rectifying action of the metal oxide film is especially large.) The internal signal path is designed without using a connector to prevent noise generation, and the direct current flow section uses a gold-plated connector.

Specifications

TYPE 212PA
METHOD Input transformer Built-in class A Vacuum tube power amplifier
CONSTITUTION Input trans – C3g 3 tube – FET driver – 212E tube – Output trans
OUTPUT 40w (Load impedance 4Ω · 8Ω)
FREQUENCY 20-40kHz -3dB/20W
TOTAL HARMONIC DISTORTION THD 1% typ/40W 1kHz 0.2% typ/10W 1kHz
NFB Non
S/N RATIO 90dB / 10W 8Ω
INPUT SENSITIVITY 1V / 40W
GAIN 25dB / 8Ω terminal
INPUT / IMPEDANCE RCA 1line 1.5kΩ
VOLUME By front volume
DUMPING FACTOR DF Over 5
SPEAKER OUTPUT 4Ω / 8Ω terminal
POWER SUPPLY AC100/120/200/240V 50,60Hz
POWER CONSUMPTION 400w
SIZE 188W×385H×563D Knob,SP terminal not included
WEIGHT 24.5kg
FINISH Silver alumite and precious rosewood veneer
ACCESSORIES Rhodium plated AC power cable
WARRANTY PERIOD 5 years (excluding consumables) registration is required

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£75,000.00
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Our delivery charges are based on weight and are charged at royal mail rates. Once you have added an item into your basket the shipping charge should appear based on the weight of your order, initially the charge is shown from a UK resident but after you enter your personal details the shipping for your country will appear. We deliver to any country in the world, anywhere with a valid address, typical delivery times are between 3 and 7 days.

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On heavy and bulky items the charges can be quite high so please enquire via e-mail or telephone us for an exact cost to avoid mis-understandings.

Delivery times are based on current workloads, we try to dispatch in stock orders within 3 days of receipt, if your order is urgent please add a note in the order comments box. Occasionally we may run out of stock of an item or if it is built to order (power supply’s, mains leads etc) it could take slightly longer to dispatch.

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All items on the site (except those made to order) can be returned under the consumer contracts regulations within 30 days. Please contact us prior to returning so we can discuss your requirements. If the item has been specially ordered (not specially made) we reserve the right to charge a nominal re-stocking fee. We expect any goods returned to be in new condition complete with original packaging otherwise we reserve the right to refuse a refund. Items classed as “tailor made” cannot be returned under the regulations although Brook Audio may accept the return under certain circumstances.

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We get asked 100’s of times every week for tracking numbers, these are usually a waste of time as they only tell you that the goods are progressing through the carriers system. Usually for items sent overseas the country you live in will determine how quickly your goods arrive, as an example the Spanish postal service is very very slow, the Russian customs clearance can take weeks as well as Brazil.

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CS Port Monaural Power Amplifier 212PA Power Amplifier

£75,000.00
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