| Brand | Philips | |||||
|---|---|---|---|---|---|---|
| Type | BX690A | |||||
| Picture |
| |||||
| Power | AC (110/125/145/200/220/245V) 60W | |||||
| Bands | LW (715-2000m), MW (185-580m), 6 X SW 37-50m, 31-42.5m, 24-31.8m, 19-25.8m, 15.5-20m 13-17m | |||||
| IF | 452 KHz | |||||
| Cabinet | Wood | |||||
| Dimensions | 63 x 40 x 26 cm | |||||
| Weight | 14.5 kg | |||||
| Controls | Vol/off, tone/bandwidth, bands, tune | |||||
| Internal speaker | Typenr:9704-05 21cm, 7 Ohm | |||||
| Produced | 1949 | |||||
| Price | Fl 425,- | |||||
| Tubes | ECH21 (osc./mixer) EAF42 (IF stage and AVC) EAF42 (AF and det.) 2x EL41 (pushpull output) EM4 (tuning eye) AZ1 (rectifier) | |||||
| Display Lamp | 2 X 8045D-00 | |||||
| Notes | The Philips BX690A has a peculiar output stage, consisting of a push-pull output, but there is no tube working as the phase inverter. Instead, one tube is driven directly from the preamplifier and the other tube has no signal on its control grid; the two cathodes are connected to each other and carry the signal, fed back from the output transformer. Thus the second tube is actually driven from the output of the first tube, comparable to the series-balanced output, but here the driving signal goes all the way through the output transformer (big job with 10 wires).The band indicator is also nice: rotating the band switch elevates the entire dial such that the chosen band is the lowest one visible.The radio offers very good sound quality, and is very selective and sensitive on all its eight bands. Just a BFO and the 11m and 80m bands would turn it into a nice ham receiver! | |||||
| DataSource | Gerard's Radio Corner |
(c) 2000 Mario Huizinga
Last updated: 05-18-2003
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