Here is one of the first USB tuners that was available from Hauppauge Computer Works. Totally analog tuner of course, this model required 2 cables – a USB interface & a sound cable for the audio output of the tuner.
A/V connections.
For those who are interested. Here is the label with the model details.
Connection to an external antenna.
Bottom of the PCB.
Top of the PCB showing the USB interface IC (top left), cache memory (top right) & the main tuner assembly.
This is a small audio mixer, marketed for camcorder audio dubbing.
I/O Panel on the rear of the unit. Contains a small preamp, but will not drive speakers directly. Power is a 9v battery or plugpack.
Front of the PCB removed from the case. Mic preamp bottom right corner. Each channel has it’s own Preamp IC between the faders.
Rear of the PCB.
This is an old cordless landline phone, with dead handset batteries.
Here’s the handset with the back removed. Shown is the radio TX/RX board, underneath is the keyboard PCB with the speaker & mic. All the FM radio tuning coils are visible & a LT450GW electromechanical filter.
Radio PCB removed from the housing showing the main CPU controlling the unit, a Motorola MC13109FB.
The keypad PCB, with also holds the microphone & speaker.
Bottom of the keypad board, which holds a LSC526534DW 8-Bit µC & a AT93C46R serial EEPROM for phone number storage.
Here’s the base unit with it’s top cover removed. Black square object on far right of image is the microphone for intercom use, power supply section is top left, phone interface bottom left, FM radio is centre. Battery snap for power backup is bottom right.
PSU section of the board on the left here, 9v AC input socket at the bottom, with bridge rectifier diodes & main filter capacitor above. Two green transformers on the right are for audio impedance matching. Another LT450GW filter is visible at the top, part of the base unit FM transceiver.
Another 8-bit µC, this time a LSC526535P, paired with another AT93C46 EEPROM. Blue blob is 3.58MHz crystal resonator for the MCU clock. The SEC IC is a KS58015 4-bit binary to DTMF dialer IC. This is controlled by the µC.
Underside of the base unit Main PCB, showing the matching MC13109FB IC for the radio functions.
