Pioneer F-100

Commentary

Digital synthesizer tuner with technology condensed into slim body.

In order to improve the RF intermodulation characteristics, the front end is equipped with a varicap equivalent to 3 series, and the twin varicap provides a dynamic range equivalent to that of a varicon.

The MPX decoder separates the composite signal obtained from the FM detection circuit into L/R audio signals. It uses a unique direct-through MPX.
This system outputs only the necessary signal without passing the signal through the active system, so that a clear stereo signal can be obtained without being affected by noise caused by non-linearity of the transistor.

In order to increase the merit of the quartz lock system that locks the reference frequency and the local oscillation frequency made by the quartz oscillator and reliably captures the station, we have adopted the pulse swallow system that eliminates the problem of noise caused by the reference frequency remaining in the signal line when the reference frequency is increased from 12.5 kHz to 25 kHz and moved out of the audible band.
This stabilizes the operation and improves the signal-to-noise ratio.

The AM section is equipped with a new large loop antenna, and high sensitivity is achieved by using an FET buffer for the tuning coil of the antenna.
A 2-element ceramic filter is used in the IF section to eliminate proximity interference.

Equipped with an FM + AM random 8-station preset switch and an FM/AM 8-station preset switch.

It is equipped with an AUTO search that automatically selects the channel with the UP/DOWN switch and a MANUAL search that allows you to select the desired frequency by yourself.

Equipped with a convenient REC level check for air check.

Model Rating

Type	FM/AM Digital Synthesizer Tuner
FM Tuner Section
S/N ratio 50 dB sensitivity	Mono : 1.8 V, new IHF 16.2 dBf Stereo : 19.8 μ V, new IHF 37.2 dBf
Practical sensitivity	Mono : 0.95 μ V, new IHF 10.8 dBf
SN ratio (at 85 dBf input)	mono:86dB stereo:80dB
Harmonic distortion factor	Mono : 0.05% (100 Hz), 0.05% (1 kHz), 0.1% (10 kHz) Stereo : 0.08% (100 Hz), 0.08% (1 kHz), 0.2% (10 kHz)
Capture ratio	1.0dB
Effective selectivity	56dB(400kHz)
Stereo separation	50dB(1kHz) 35 dB (50 Hz to 10 kHz)
Frequency characteristic	30 Hz ~ 15 kHz + 0.5 -1.0 dB
Image interference ratio	60dB
Subcarrier suppression ratio	55dB
Muting action level	8.7 μ V (30 dBf)
Antenna input impedance	300 Ω Balanced Type 75 Ω Unbalanced Type
<AM Tuner Section>
Practical sensitivity	150 μ V/m (loop antenna)
Selectivity	40dB
Signal-to-noise ratio	50dB
<General>
Output Level / Impedance	FM (100% modulation) : 650mV/1.7k Ω REC CAL output (equivalent to 50% modulation of FM) : 325 mv AM (30% modulation) : 150mV/1.7k Ω
Power supply voltage	100 VAC, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Control Law)	8W
External dimensions	Width 420x Height 60x Depth 221 mm
Weight	2.5kg