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Heathkit Model HD-1418 Active Audio Filter
*** Sold Pending Funds ***
Heathkit Model HD-1418 Active Audio Filter.
This Active Audio Filter is great for use with
older receivers and transceivers on SSB and
CW. With five pole high-pass and low-pass
filters plus a two pole notch /peak filters you
can pull weak signals out of the noise and
cancel out heterodynes and QRM. Control
filters through 300-2500 Hz.
Cosmetically good and operational in my
shack, the unit has very flexible power
requirements. It runs off of 7-13.5 VAC or
9 to 18 VDC (power supply is not included.)
Very easy to setup and use. Simply connected
it between your rig's speaker output and your
speaker. Includes a 1/4" front panel
headphone jack. (This is an analog device
using Op Amps and it is not DSP-based.
Therefore, it lacks noise-blanker and auto
Model HD-1418 Active audio filter
Original Illustration Booklet
$60 plus shipping.
Does not include power supply wall wart.
Paypal or personal checks only. (Personal
checks need to clear before unit will be
Sorry, CONUS shipping only. No International
This was marked by the originator on 2012-12-10 (UTC) as being sold.