From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Installation instructions and circuit diagram for a Model #965 car radio receiver.
| Identifier | ExFiles\Box 63\3\ scan0104 | |
| Date | 4th November 1934 | |
| Remove the bracket from the receiver by loosening the nuts on the ends—do not remove the nuts. Mount the bracket, inserting one bolt through bracket and dash, putting on a lockwasher and a nut. Tighten the nut sufficiently to hold bracket in position,—then adjust the bracket to a level position. Now drill through the lower bracket hole, insert the other bolt and tighten both nuts securely. Lift the receiver up into its place between the sides of the bracket, letting the side bolts slip down and forward into the slots of the bracket. See that the lockwashers are on the inside face of the bracket next to the receiver and the plain washers on the outside of the bracket, next to the nuts. Clamp the receiver in place by tightening both nuts securely. It is important that both these nuts and the two nuts holding the bracket to the dash be screwed tightly to insure good electrical contact. Now mount the remote control head permanently in the position selected on the steering column. The clamp is made adjustable to accommodate different sizes of columns. Insert the free end of the right hand cable into the upper chuck on the left side of the receiver. Push it in lightly with one hand while turning the right hand knob back and forth a little until the tongue of the drive cable engages the slot in the condenser shaft, then while holding the cable in place, tighten the set screw in the chuck just enough to prevent turning or withdrawal of the cable housing. Proceed in the same manner to connect the other drive cable, inserting the key or key knob into the key hole at the left on the control head, and turning back and forth as before. On turning all the way to the left, the switch will snap to the “off” position. Do not drive the set screws of the chucks into the cable housings too tightly or the cables will bind. Now tie the control cables and pilot light lead together and to the steering column and dash, using friction tape. Do this at as many points along their length as is necessary to prevent swinging and vibration of the cables but always bearing in mind the fact that smooth operation of the controls depends on the manner in which the cables are run. No sharp bends or kinks must be allowed. The battery lead extends from the rear of the receiver at the lower left corner and terminates in a clip. Fasten this clip on to the ammeter battery post. If uncertain as to which post is the battery post, connect the clip to either post and switch on the set by turning the key knob a little to the right. The switch will then snap “on” and the dial will light up immediately. Now notice the reading on the car ammeter as the set is turned “on” and “off”. If, when the set is “on”, the ammeter shows discharge turn off the set and move the clip to the other post. The controls should turn freely and without binding. If the action is jerky or too stiff, it is an indication that the cables were not properly installed and should be gone over according to the instructions. The antenna is now to be connected as follows: Check the car antenna for a possible ground. If ungrounded, connect it to the antenna lead of the receiver—the inner wire extending through and beyond the shield. Be careful to make a good splice and solder if possible, as poorly made splices make uncertain contact and with the motion of the car will be jarred, thus producing noises and erratic reception. Connect also, the shield of the car antenna to the shield of the receiver antenna lead, being careful first to tape the antenna splice thoroughly to avoid shorting. Solder the joint in the shields if possible. Motor Noise Suppression The installation of the receiver may now be considered complete, provided all the above instructions were faithfully carried out. A preliminary test can now be made after which the suppression of motor noise may be undertaken as follows: ---SCHEMATIC DIAGRAM TEXT--- MODEL #965 AMMETER CLIP 6 V.{VIENNA} FUSE PILOT SW. HEATERS 'A' HOT FIELD 6 OHMS Tube Types: 78, 6A7, 78, 75, 41, 84 Frequencies: 172.5 K.C., 172.5 K.C. Other Labels: VIBRATOR, R.F.C. Component Values: .1 MEG, .05 μf, 500, .1 μf, 50,000, 250 μμf, .1 MEG, 50000, .0002, 3500, .02 μf, 10,000, .5 μf, 10 μf, 200, 6 μf, .5 μf, 600, .5 MEG, .25 MEG, .05 μf.{Mr Friese} | ||