[R-390] Line Filter

[Les Locklear]

What Tisha said...........works well for the SP-600 too!

Les Locklear
Drake R8B
Hammarlund HQ-150
Hammarlund HQ-180A
Hammarlund SP-600 Re-Engineered by John R. Leary
Ten Tec RX-350

---- Original Message ----- 
  From: Tisha Hayes 
  To: r-390 at mailman.qth.net 
  Sent: Friday, June 04, 2010 8:02 PM
  Subject: [R-390] Line Filter


  I use a Corcom 6EHQ1 medical grade line filter. You can find them on eBay
  for about $20 each.

  The insertion loss looks like;

  Line-Ground:
  24 dB 10 KHz
  29 dB 20 KHz
  39 dB 50 KHz
  42 dB 150 KHz
  28 dB 500 KHz
  35 dB 1 MHz
  36 dB 2 MHz
  30 dB 5 MHz
  24 dB 10 MHz
  16 dB 20 MHz
  15 dB 30 MHz

  Line-Line:
  6 dB 10 KHz
  10 dB 20 KHz
  43 dB 50 KHz
  70 dB 150 KHz
  75 dB 500 KHz - 2 MHz
  65 dB 5 MHz
  55 dB 10 MHz
  50 dB 20 MHz
  40 dB 30 MHz

  The data sheet is at   http://www.corcom.com/Series/Medical/HQ/

  Getting an old line filter means that the caps in the filter are also old
  and probably leaky. You will end up with an inferior filter that may have
  the same problems as what you are replacing.

  I had a problem with the radio tripping out the GFCI, after I replaced the
  line filter that problem went away.



  -- 
  Ms. Tisha Hayes/ AA4HA
  ----------------
  Factory certified interoceter repair center.
  "Remember, use only genuine interoceter parts."
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