Specifications
- Max. number of channels
- 6 (band 4)
- Channel spacing
- 25 kHz
- Max. spread between extreme channels
- 1000 kHz
- Output power
- 0.5 W (or 1.5 W)
- Max. frequency deviation
- ±5 kHz
- Transmitter audio response
- 300–3000 Hz
- Max. transmitter distortion
- 10 %
- Max. spurious emissions: harmonics
- 25 µW
- Max. spurious emissions: other
- 2.5 µW
- Sensitivity (SINAD)
- 1 µV
- Min. selectivity, 2 signals
- 70 dB
- Min. intermodulation ratio, 3 signals
- 70 dB
- Min. image rejection
- 70 dB
- Receiver audio response
- 300–3000 Hz
- Max. receiver distortion
- 10 %
- AF output power
- 0.2 W
- Max. current, receiving
- 0.012 A
- Max. current, transmitting
- 0.36 A
- Operating temperature
- −25…+55 °C
- Power supply
- 12.6 V DC (−15 %…+10 %)
Sources: [1]
Description
The R 8250 is a portable radiotelephone made by IEMI in Bucharest, listed in the Agenda radioelectronistului (1st edition, 1983) [1].
It appears only in the 1st edition of the Agenda, printed „R-8250”, among the portable radiotelephones of IEMI, with up to 6 channels in band 4 (145–175 MHz) and 0.5 W (or 1.5 W); its values are in the specifications [1]. Its frequency stability is printed as ≤ 5·10 to a power whose exponent cannot be read in the scan, so it is left out [1]. The 2nd edition (1989) no longer lists it [2].
The accessories listed for it are a handset (R-8475), an antenna (R-8442) and a 4 Ah battery case with charger (R-8504), on request, and a battery case (R-8507, 4 Ah, or R-8508, 8 Ah) with a charger (R-8506) [1].
Gallery
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Schematics
No schematics available yet.
Documents
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References
- [1]N. Drăgulănescu – „Agenda radioelectronistului”, 1st edition, Editura Tehnică, 1983, section 4.9 „Principalele caracteristici ale unor radiotelefoane produse în RSR” (producător: I.E.M.I. – București), pp. 566–569
- [2]N. Drăgulănescu – „Agenda radioelectronistului”, 2nd edition, Editura Tehnică, 1989, chapter 48 „Principalele caracteristici ale radiotelefoanelor produse în R.S.R.” (producător: I.E.M.I. – București), pp. 698–700