Heathkit Item For Collectors or Experimenters

The HD-1422 and HD-1424 as a package.

Sold as is – untested.

$49.99 or best offer + shipping – Flat rate $25.00

From the time when kits came in a brown cabinet with white silkscreening. The word Heathkit on the front was in red. This scheme was in line with much of the ham gear of that day such as the HW-9 QRP radio.

#1) – Heathkit HD-1422 – Antenna Noise Bridge

If you work with antennas, an antenna noise
bridge can be a very handy tool.

• Finding Antenna Resonant Frequency.
• Finding Non-resonant Characteristics.
• Making Tuned Circuit Measurements.
• Making Component Measurements.
• Finding Transmission Line Resonant Frequency.
• Tuning Transmission Line Length 1/4 or 1/2 wave.
• Antenna Tuner Adjustments.

HHD-1422-A Antenna Noise Bridge

Heathkit HD-1422 Antenna Noise Bridge (manual)

#2) – The Heath HD-1424 – Active Antenna

The HD-1424 contains two cascaded FET source followers to increase the low impedance signal from the attached 24-inch collapsible whip antenna. The input of the first source follower is tuned with a simple LC circuit. Inductors are switched in to cover 300 KHz to 30 MHz in five bands. Besides the TUNING and BAND knobs on the front panel there is also a GAIN control that adjusts the signal level between the second source follower and an output amplifier that drives the 50O output to the receiver’s antenna input. An OFF ON slide switch applies power and switches the active antenna into the circuit. When off, the attached vertical whip and external antenna connector are directly connected to the output to the receiver. An LED power indicator is also on the front panel. Heath’s design is well laid out and the circuit remains stable independently of the gain and frequency settings.

HD-1424 Active Antenna

Heathkit HD-1424 Active Antenna (manual)

Both the HD-1422 and HD-1424 as a package.

What you see is what you get.

Sold as is – untested.

$49.99 or best offer + shipping – Flat rate $25.00