PARTRIDGE TG5479
Hiwatt 100
The TG5479 has nearly an identical wiring pattern as the TG6556. In constast to the TG6556, this version was delievered was an additionally 100 Volt secondary tap, which was a very common output tap in the sixties and seventies for PA amplifications. With this tap it was possible to feed several loudspeakers with lower losses.

In the course of the years, the winding patterns changed as in the TG6556 too. The 100 Volt tap was removed, which had a great effect in sound.

Even having the same lamination grade, the same size and nearly an identical primary impndance as the 100 Watt Plexi Marshall®, both transformers are having a completely different tone respond.

Above I would like to give you some results of measurements of this transformer. Please keep in mind, that these measurements are time-intensively.
I don´t mind using these results on other sites, but I think it would be more than fair to ask before copy and paiste, thank you very much.

PARTRIDGE TG5479
Raa
1750 Ohms
Inductance@50Hz

self-inductance@4,5H
10 Volts@100H
230 Volts@170H
Leakage Inductance @1,6kHz
P1+P2/S 1,9mH
P1/P2 1,1mH
Frequency-Respond
DC-resistance (primary)
(orange-black) 24,0 Ohms
(black-red) 25,3 Ohms
DC-resistance (secondary)
4 Ohms@0,29 Ohm
8 Ohms@0,38 Ohm
16 Ohms@0,50 Ohm
100 Volts@2,48 Ohm
self capacity of primary, CT and one side of secondary connected to core
ca. 330 pF
Frequency-Respond
As th TG6556, this output-transformers has an unusually wide frequency respond too. The -3dB point are at 3.6Hz and at 112 kHz. Another point for that are the above shown square-wave and phase-shift pictures. A very slight ringing at a 10kHz square-wave signal and minimum phase shifts at 20Hz and 20kHz.
Square Waves/Phase Shift Pictures
(resitive primary load 2*900 Ohm)
enlarge
100Hz/8Ohm (3,6 mW)
1kHz/8Ohm (3,6 mW)
10kHz/8Ohm (3,6 mW)
Phase Shift 20Hz/8Ohm (3,6 mW)
Settings
Phase Shift 20kHz/8Ohm (3,6 mW)
All square-waves and phase-shift pictures were taken at an output voltage of 170 mV (3,6mW).
The lower beam is the original signal, the upper is showing the output signal, taken from the 8 Ohms tap.