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Universal Stereo Tube Output Stage (need to add two 2.2uF coupling caps)

Universal Stereo Tube Output Stage

Price: $149.00

Universal Stereo Tube Output Stage (UTS)

Design and performance

Complete module including the specially designed over spec power transformer for 115 to 240 V operation. Hybrid anode follower with circle of two CCS using ECC88/6922/6DJ8/6H1/6CG7 (not included); S/N ratio > 100 DBA, 2V RMS into a 10K THD is around 0.1%, 20 Hz to 20 KHz <-0.5db, output minimum 10V RMS on clip into 10K load <1% THD, output impedance is 75-100 ohm; Also includes Obbligatto coupling capacitor.

Application

one board can do stereo RCA output tube stage for a DAC, two boards can do balance output tubes stage DAC. One board could make a nice simple line stage, two boards could be configured as a balanced line stage, or an RC RIAA between two boards would make a nice phono stage with about 40 DB of gain, or two boards with a 10K LCR and a 10K termination resistor would be an easy way to build an LCR phono stage.

Tube used

ECC88/6DJ8/6922/6H1/6CG7 only. Do NOT fit 6H30 or 6H6

Dimensions

140 mm x 80 mm x 45 mm

Installation instruction:

Here is the manual in all of its glorious 39 pages! It gives detailed instructions for using the UTS as a voltage or current output DAC, single ended or balanced line stage with 6 or 12 DB gain, and instructions to implement as a moving magnet single ended stereo RIAA EQ preamplifier. In addition to the instructions provided it is also possible to use the UTS as a single or balanced tape head stage, classic high gain two channel transformer coupled microphone preamplifier, and input and summing amplifier such as a classic tube mixer.

NOTE :This is for the purchase of the module without the power transformer, without 2.2uF coupling caps and without the tube.

Showcases:

Click link to view:

Universal Tube Output Stage Installation Manual

The Vinyl Song Universal Tube Output Stage EZ Phono Installation Manual

Instructions for Projekt UTS linestage

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LSK389-A JFET for Ultimate Volume Control System (pair)

LSK389-A JFET for Ultimate Volume Control System (pair)

Price: $30.00 (Pair)

These JFET are specially selected for our Ultimate Volume Control System. Grade A LSK389, loss range is only 2.6 to 6.5mA.

 

Function in Ultimate Volume Control System

Install them in the positions as provided on the Audio PCB to create a standalone Remote volume/selector system linestage with 50 ohm output impedance.

Install the system in a suitable box and ‘drive away’.

 

Click link below to view:

Drill Template

Installation Manual

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Audio Board for Ultimate Volume Control (Op-amp free!)

Audio Board for Ultimate Volume Control

Price: $175.00

This Preamplifier Control System uses an electronic potentiometer as used in all current Audio Research Preamplifiers, unlike other common volume control chips this device does not contain a build in op-amp. The Preamplifier Control System consists of two PCBs: Audio PCB: 1. 2 channels 2. 5-way input switching, and 3. Volume control, can be configured as mono balanced or stereo single ended Features: 127 step volume control from -52dB to 0dB attenuation with 12 LED level indicators 5 Inputs with LED indicators Remote control via universal remote control (RC5 code) Options for shunt operation (-46dB to -3dB or -52dB to -6dB or -66db to -15db) 5 way Silver alloy relay input switching LED’s driven on/off, not “multiplexed” to remove digital noise Audio PCB includes option for fitting two LSK389B Zero FeedBack J-Fet buffer (direct coupled – no coupling capacitors) to make a stand alone buffered passive preamplifier with <50Ohm Output Impedance must be used together with a controller and ps.

Showcases:

Wedding Bells at DIYHFS

When is Ultimate Ever EZ?

Click link below to view:

Drill Template

Installation Manual

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Controller Board for Ultimate Volume Control System (op-amp free!)

Controller Board for Ultimate Volume Control System

Price: $95.00

Control PCB: 1. ALPS rotary encoders 2. LED indication of input & volume, and 3. Power-supplies and microprocessor control Features: Control PCB delivered as one PCB but allows “break-off” of the rotary encoder & LED parts (connection via 20-Pin IDC cables (supplied) Control PCB can control up to 3 Audio PCB’s (6 channels single ended or 3 channels balanced); with optional transformer can control up to 8 Audio PCB’s (16 channels single ended or 8 channels balanced) Control PCB connects to Audio PCB via 20-Pin IDC cables (supplied) Power Supply using schottky diodes and low noise regulators Torroidal mains transformer with 115/230V Primary capable of supporting 3 Audio PCB’s with buffer fitted included Mains transformer with 115/230V Primary capable of supporting 3 Audio PCB’s with buffer fitted included Gold plated, 70 micron Copper PCB’s

Showcases:

Click link below to view:

Drill Template

Installation Manual

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TentLabs Tube Heater Supply (2.5V to 13V / Max 1.5A)

TentLabs Tube Heater Supply

Price: $49.00

Purpose

TentLabs heater supply is designed to supply the heaters of indirectly heated tubes. Its’ main use is feeding phono and linestage tubes, to keep the hum levels down. The module can also be applied to feed other circuits, like the CDpro CD driver.

Application

More tubes can be connected in parallel, assumed their respective heaters are at equal potential. If heater potentials are different, separate modules (and transformer windings for each module) are required. The heater reference needs to be connected close to the tube The total output current is limited to 1.5Adc, mainly due to heat dissipation. The units are factory adjusted at your order. After installation, the supply needs no adjustment.

Specifications

Electrical
• Output adjustable between 2.5V and 13V, specify when ordering
• Output current maximum 1.5A
• Input voltage should not exceed 1 V above specification (see application info – to be written)
• Minimum input voltage 4 Vac
• Output noise < tbd uVrms (10Hz – 20kHz)
• Output hum < tbd uVpeak at 100Hz / 120Hz
• Output impedance < tbd mOhm
• Fast switch-off function available on request (required if used to supply 9V section of philips CDpro CD drive)
• The heatsink is not electrically isolated from the circuit and should be isolated from the chassis
• The output is not short circuit proof

Mechanical
• Total size 40*60*40mm (W*L*H, heatsink included, standoffs excluded).
• Weight each 60 gram (excluding packaging)
• Hole pitch 31* 51mm, hole diameter 3.5mm
• Needs 8mm stand-offs to mount on chassis, supplied with modules.

Pricing & warrantee

5 years of warrantee by Tentlabs (the Netherlands), assumed they are built in according application information.

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