ISB Adaptor RA-98
Racal Engineering / Instruments / Electronics Ltd., Bracknell
- Pays
- Royaume Uni
- Fabricant / Marque
- Racal Engineering / Instruments / Electronics Ltd., Bracknell
- Année
- 1960 ??
- Catégorie
- Divers / autres - détails dans les remarques
- Radiomuseum.org ID
- 106381
- No. de tubes
- 16
- Lampes / Tubes
- 6AS6 12AU7 6AU6 EB91 12AX7 6BA6 6BA6 6BA6 12AT7 6AU6 EB91 6AU6 6AS6 12AT7 6AS6 EF91 EF91
- Principe général
- FI/IF 100/18 kHz
- Gammes d'ondes
- - sans
- Tension / type courant
- Alimentation Courant Alternatif (CA) / 100-125 / 200-250 Volt
- Haut-parleur
- - - Pas de sortie basse fréquence
- Matière
- Boitier métallique
- De Radiomuseum.org
- Modèle: ISB Adaptor RA-98 - Racal Engineering /
- Forme
- Rack
- Dimensions (LHP)
- 483 x 133 x 355 mm / 19 x 5.2 x 14 inch
- Remarques
- Independent Side Band Adaptor matching the RA-17 family receivers, allows reception of USB, LSB and ISB signals.
This adaptor is equipped with a motor driven AFC system locking on pilot carrier for ISB / ECSS reception. The AFC must kept switched off for SSB signals without any carrier.
The 100 kHz 3rd IF of the RA-17 is mixed with an LC (only in variant RA-98D crystal controlled) 118 kHz oscillator signal for a new IF of 18 kHz. By mixing with another 18 kHz oscillator signal, the audio information of both sidebands is extracted.
Variants: RA-98A / B similar with different connectors, RA-98C with extended low frequency audio response to 150 Hz for receiving commercial broadcast transmissions (ISB feeders), RA-98D with internal crystal controlled 118 kHz oscillator for reception of SSB signals without carrier, RA-98E with an additional transistorized coupling circuit for use with transistorized receivers (as RA-1217).
- Poids net
- 17.3 kg / 38 lb 1.7 oz (38.106 lb)
- Littérature
- Racal Handbook, Rinus Jansen
- Auteur
- Modèle crée par Martin Bösch. Voir les propositions de modification pour les contributeurs supplémentaires.
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Variants of the RA-98 SSB Adaptor:
RA-98A: British type coaxial connectors, no internal crystal controlled 188 kHz oscillator,
need external 118 kHz source for hich stability ECSS operation.
RA-98B: US typ coaxial connectors and Monitor jack socket, no internal crystal controlled 188 kHz oscillator
RA-98C: broadcast version of R-98B
RA-98D: with internyl crystal controlled 118 kHc oscillator with crystal oven
switched by AGC - control knob.
RA-98E: with transistorized coupling circuit for use with transistorized receivers as RA-217 and RA-1217
RA-98F: RA-98A modified for use with RA-317.
RA-98A: British type coaxial connectors, no internal crystal controlled 188 kHz oscillator,
need external 118 kHz source for hich stability ECSS operation.
RA-98B: US typ coaxial connectors and Monitor jack socket, no internal crystal controlled 188 kHz oscillator
RA-98C: broadcast version of R-98B
RA-98D: with internyl crystal controlled 118 kHc oscillator with crystal oven
switched by AGC - control knob.
RA-98E: with transistorized coupling circuit for use with transistorized receivers as RA-217 and RA-1217
RA-98F: RA-98A modified for use with RA-317.
Martin Bösch, 02.Oct.06