A ground connection may improve reception also, and should be tried if maximum performance is desired. For a good ground, use a COLD water pipe or a ground rod. Use as short and direct a wire as possible between the pipe or rod and the ground terminal (screw terminalfarthest from edge of chassis).

A loudspeaker of the PM dynamic type with 3-4 ohm voice coil impedance should be connected to the set by attaching the two prong speaker plug to the speaker leads and plugging into the speaker socket. If a 6-8 ohm speaker is available, it may be used without materially affecting the performance,

A record player or changer using a crystal type pickup cartridge may be connected to this receiver to provide superior reproduction of recordings. Connect the pickup by plugging the lead into the phono socket. If your player does not have the standard plug, remove existing plug'and attach the phono plug supplied with the kit. Plug the line cord for the turn table motor into the 110V. outlet on the chassis. Turn the phono switch clockwise to switch from radio to record player.

NOTE: The pilot light is connected in the rectifier circuit to permit the use of a standard pilot light bulb. The socket is, therefor, about 300 Volts above chassis. DO NOT TOUCH SOCKET WITH SET TURNED ON.

ALIGNMENT

Connect a signal generator ground lead to the chassis. Connect the signal generator output "(hot") lead through a. 01 MFD condenser to pin # 4 on the 12SH7 socket (IF grid). Turn signal generator on and set dial to 456 Kc. The signal, if modulated, may be observed by noting the loudness at the speaker, or on the scale of an output meter connected across the speaker terminals, or with the aid of a vacuum tube voltmeter across the volume control. With the volume and tone controls turned fully clockwise, turn the brass screws in the out put IF transformer for maximum indication. Use as low an indication as possible by reducing the output from the signal generator as the receiver sensitivity increases.

Without disturbing the signal generator dial, remove the. 01 MFD condenser from pin # 4 on the 12SH7 socket and connect to the grid cap of the 12K8 tube. Adjust the brass screws in the input IF transformer as above. NOTE: Do not adjust the output IF screws with the signal fed into the 12K8 tube. This completes the IF alignment.

Connect the signal generator output lead through a 200-300 MMF condenser to the ANT. terminal. Turn the tuning control until the condenser plates are fully unmeshed. Set the signal generator to 1720 Kc. Adjust the oscillator trimmer till the signal is noted. Reset the signal generator to 1400 Kc. Find the signal by turning the receiver tuning control. Now adjust the antenna trimmer for maximum indication. This completes the alignment. A short antenna should now bring in many stations.

Heathkit BROADCAST RECEIVER MODEL BR - 1

BR 1 RECEIVER PARTS LIST

A ground connection may improve reception also, and should be tried if maximum performance is desired. For a good ground, use a COLD water pipe or a ground rod. Use as short and direct a wire as possible between the pipe or rod and the ground terminal (screw terminalfarthest from edge of chassis). A loudspeaker of the PM dynamic type with 3-4 ohm voice coil impedance should be connected to the set by attaching the two prong speaker plug to the speaker leads and plugging into the speaker socket. If a 6-8 ohm speaker is available, it may be used without materially affecting the performance.

A record player or changer using a crystal type pickup cartridge may be connected to this receiver to provide superior reproduction of recordings. Connect the pickup by plugging the lead into the phono socket. If your player does not have the standard plug, remove existing plus and attach the phone plug supplied with the kit. Plug the line cord for the turn table motor into the 110V. outlet on the chassis. Turn the phono switch clockwise to switch from radio to record player.

NOTE: The pilot light is connected in the rectifier circuit to permit the use of a standard pilot light bulb. The socket is, therefor, about 300 Volts above chassis. DO NOT TOUCH SOCKET WITH SET TURNED ON,

ALIGNMENT Connect a signal generator ground lead to the chassis. Connect the signal generator output ("hot") lead through a. 01 MFD condenser to pin # 4 on the 12SH7 socket (IF grid). Turn signal generator on and set dial to 456 Kc. The signal, if modulated, may be observed by noting the loudness at the speaker, or on the scale of an output meter connected across the speaker terminals, or with the aid of a vacuum tube voltmeter across the volume control. With the volume and tone controls turned fully clockwise, turn the brass screws in the out 110V. OUTLET put IF transformer for maximum indication. Use as low an indication as possible by reducing the output from the signal generator as the receiver sensitivity increases.

Without disturbing the signal generator dial, remove the. 01 MFD condenser from pin # 4 on the 12SH7 socket and connect to the grid cap of the 12K8 tube. Adjust the brass screws in the input IF transformer as above. NOTE: Do not adjust the output IF screws with the signal fed into the 12K8 tube. This completes the IF alignment.

Connect the signal generator output lead through a 200-300 MMF condenser to the ANT. terminal. Turn the tuning control until the condenser plates are fully unmeshed. Set the signal generator to 1720 Kc. Adjust the oscillator trinner till the signal is noted. Reset the signal generator to 1400 Kc. Find the signal by turning the receiver tuning control. Now adjust the antenna trimmer for maximum indication. This completes the alignment. A short antenna should now bring in many stations.

Heathkit BROADCAST RECEIVER MODEL BR - 1

BR 1 RECEIVER PARTS LIST