Due to its design the Universal Tube Output Stage can be used in a number of additional Roles.

Each module can be configured as Single Ended or Balanced Circuit with the following levels of Gain and input Impedances (assuming source with output impedances that are small compared to the input impedance):

Gain	Input Impedance
~ 30dB ~ 47 kOhm	~ 47 kOhm
~ 12 dB	~ 200 kOhm
~ 6 dB	~ 400 kOhm

In addition other gain levels can be set by using the “30dB Gain” configuration and inserting a resistor in series with the signal. Some of them, in steps of 6db are listed below

Gain	Series Resistor
30dB 1 kOhm	1 kOhm
~ 24 dB	33 kOhm
~ 18 dB	91 kOhm
~ 12 dB	220 kOhm
~ 6 dB	40 kOhm

Due to the extremely wide number of possibilities in configuring these Modules we are showing only a small number of the most common options.

This type of Application requires the following jumper settings:

The input connections should follow the Scheme shown underneath:

This type of Application requires the following jumper settings:

The input connections should follow the Scheme shown underneath

This type of Application requires the following jumper settings:

The input connections should follow the Scheme shown underneath:

This type of Application requires the following jumper settings:

The input connections should follow the Scheme shown underneath:

One possible application is to use two Universal Tube Output Stages together with a minimal number of external components to form the RIAA Equalisation network as Phonostage.

One Module will be used for each channel, so Tubes used should be identical in manufacturing and preferably matched.

This application will produce a Moving magnet and High Output Moving compatible Phonostage with 47kOhm input impedance, 36 – 38db Gain (depends on the exact tube type and manufacturer used).

When using narrow tolerance or selected parts (tolerance 0.5% or better for capacitors and 0.1% for resistors) for the RIAA as equalisation the RIAA EQ will be better than +/-0.1dB from 100Hz to 20KHz with an 0.5dB rolloff at 20Hz and a -3db point below 10Hz.

If 1% tolerance resistors and 5% tolerance capacitors are used the RIAA EQ will be better than +/- 0.2dB with no more than 0.6db rolloff at 20Hz. For example: +/-0.2db RIAA requires 2.5% Tolerance capacitors. With 5% Tolerance around +/-0.3db are guaranteed. With 10% Tolerance capacitors around +/-0.5db. With 1% tolerance Capacitors it is better than +/-0.15db

This type of Application requires the following jumper settings:

The input connections and other connections should follow the Scheme shown underneath.

The Resistors and Capacitors form the RIAA Equalisation. In principle other applications (such as tape head amplifier) could use the same principle diagram but with the Equalisation Network values adjusted to suit.

Attached an alternative way to do a 12dB Gain linestage with the UTS, using the attenuator in shunt mode.