====== Noise Blanker Model 249 ======
{{249.jpg?150}}

===== Description =====
Plug-in PC assembly for Models [[540]] and [[544]].  Effectively blanks most impulse noise.  Blanker is inserted into receiving I-F channel.  Disable with switch on ALC control.  For [[540]] transceivers with serial numbers not starting with "T" and below 01349, order Model 249/MK.

===== Specifications =====
  ***Input Frequency:** 9 MHz.
  ***Signal Gain:** 0 dB.
  ***Semiconductors:** 1 IC, 6 transistors, 2 diodes.
  ***Powered by transceiver**
  ***Size:** HWL 3/4" x 2-5/8" x 4"
  ***Weight:** 1.5 oz.