$199.99 Buy It Now or Best Offer
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Location: Greenwich, Connecticut
Ships to: US,
Item: 256714760716
All returns accepted:ReturnsNotAccepted
Hallicrafters:Hallicrafters
Type:Multiband Tube Receiver
Number of Channels:1
Color:Brown
S-72:S-72
Band:AM,HF
Audio Outputs:Headphone Jack
This listing is for a Hallicrafters S-72 AM/short wave receiver that covers 550 kHz – 30 MHz in four bands. It dates back to around 1950 and can be powered by standard 120 VAC (US). It can also be powered by a 90 volt battery for portable use. The tubes have been tested and the receiver has been fully calibrated. The top cover (shown) is included. These seem to get lost for some reason. The AM broadcast band uses the built-in loop antenna located on the hinged cover. The shortwave bands use the telescoping whip antenna or an external wire antenna can be connected to the short green wire inside the case. Reception is quite good on all bands with just the telescoping whip antenna. Note that one section is quite stiff so care should be used when pulling the antenna out to its full length. The reception is not noticeably different with the antenna fully extended so it can be left shortened slightly. This model includes an Automatic Noise Limiter (ANL) switch above the headphone jack. This can be used to help reduce static crashes. The headphone jack can be used to connect a high impedance (100 Ohm) communications headset with a standard 1/4″ plug. Some electronic components (capacitors and resistors) were replaced as they no longer met their designed specifications. The original selenium rectifier was replaced with a 1N4004 silicone diode and the line dropping resistor was changed to provide the proper voltages for the filament and plate circuits. A polarized line cord and fuse holder were added for safety. The fuse is 1/4 Amp. An included «dummy plug» (see pictures) is used if the receiver is to be operated from a battery. The manual says that the AC power plug needs to be inserted into the slots on the chassis to switch over to battery power, but since the new cord is polarized and won’t fit, the dummy plug is used instead. This has been tested and works. Also, the power cord includes an inline switch that can either be left on or used instead of the receiver’s power switch to save wear and tear. The video shows the receiver operating on all four bands. Since this was done in the daytime, there wasn’t much activity on the lowest shortwave band (band 2). This band has much more activity at night. Oddly, the video thumbnail is upside-down but the video (should) play correctly. Let me know if it doesn’t. A user manual can be downloaded here: https://bama.edebris.com/download/hallicra/s72/s72-Operating_and_Service.pdf Some interesting information about the S-72 receiver can be found here: https://people.ohio.edu/postr/bapix/S72.htm Have questions? Let me know…
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