[amsat-bb] Re: Coax type- NDT 10D - FB

[Yoshihiro Imaishi <imaishi@xxxxxxxxxxxx>]

Hello This is Yoshi.

At 2001/07/10 19:05:30 Robert Williams wrote:
> Was wondering if any can advise this coax type
> markings are NDT 10D - FB 

  Maybe It is Japanese 50-ohm low-loss transmission coax cable. I do
not know the maker "NDT" (Nippon Densen Tsuushin ???), but the 10D-FB
cable is very popular in Japan for Ham UHF and 903MHz-CB cabling.

  Here is the data of FUJIKURA 10D-FB cable.

  Freq(MHz) Loss(dB/10m) 
      30       0.17
      50       0.22
     145       0.39
     430       0.72
     900       1.1
    1300       1.4
    2300       1.95

  Here is the general rule of Japanese coax name.

  example; 10 D - F B
           ^^ ^   ^ ^
          (1) (2) (3) (4)

  (1) Diameter of shield-copper of cable in mm. 1.5/2.5/3/5/7/8/10/12...
  (2) Transmission impeadance. C - 75ohm, D - 50ohm.
  (3) Type of isolator. 2 - filled Polyethylene.
                        F - Polyethlen Form.
  (4) Type of sheld.    V - Single copper-net
                        W - Double copper-net
                        B - Alminum-foil and single copper-net.


Yoshihiro Imaishi JF6BCC/KH2GR
GL:PM53JV, ex KC6IY(T88IY),V63BP
mailto:jf6bcc@jarl.com
<http://plaza16.mbn.or.jp/~palau/index-hame.html>
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