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Author Topic: International Radio Crystal Filters  (Read 262 times)
KE5HOB
Member

Posts: 34




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« on: January 13, 2008, 07:42:39 PM »

Hello all,

I bought a TS-430s from a ham friend of mine a while back, and it came with some International Radio crystal filters installed. Now I have looked on the manufacturer's website and either I am just plain dumb or I am looking in the wrong place, but I cannot find out what these filters are. Here are the numbers, if I copied the right numbers down.

911
1024
1041
1106
1113

If anyone can tell me either what these crystals are or where to find out what they are, that would be much appreciated. Thanks in advance!

73,
John, KE5HOB
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KA5N
Member

Posts: 4380




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« Reply #1 on: January 14, 2008, 02:46:56 AM »

The numbers don't match the current catalog or the old FoxTango green sheets.  What is your concern?  With five filters you have SSB and CW covered not to mention that they would cost over $500 to replace. You can just switch through the filters and get a good idea of what you have by the way a signal sounds.
Allen
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WA3SKN
Member

Posts: 5434




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« Reply #2 on: January 14, 2008, 04:55:28 AM »

Replacing crystal filters improved selectivity!
So use the rig and enjoy the improvement over a "stock" rig.
73s

-Mike.
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KE5HOB
Member

Posts: 34




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« Reply #3 on: January 14, 2008, 05:15:11 AM »

I was just curious what they were. If you couldn't find them, it's possible those aren't the right numbers, hihi. But I guess I shouldn't worry and should just enjoy the good quality huh? Thanks guys!

73
KE5HOB.John
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KB9CRY
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Posts: 4284


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« Reply #4 on: January 14, 2008, 05:17:49 AM »

Oh, well, maybe they have a website?

Maybe look to the right side of your forum here on eHam since they are a sponsor.
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G8UBJ
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Posts: 478


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« Reply #5 on: January 14, 2008, 07:37:11 AM »

If you want to test them download a spectrum analyser and  connect your rigs Audio output into your soundcard. Then you can test the filters performance

http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=11060

73 Rex G8UBJ
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KB9CRY
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Posts: 4284


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« Reply #6 on: January 14, 2008, 08:15:01 AM »

INRAD makes filters superior to the stock ones.  Your radio's value is increased with them installed.  They work like a champ.
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W7ETA
Member

Posts: 2528




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« Reply #7 on: January 14, 2008, 08:46:09 AM »

If they aren't soldered in, remove one, and see what is effected.

The owner's manual usually shows where the filters are installed.

73
Bob
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WA9SVD
Member

Posts: 2201




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« Reply #8 on: January 15, 2008, 01:42:00 PM »

Maybe contact InRad and ASK?

    They are pretty savvy people, and if you give them the numbers, and the brand/model of the radio, I bet they can tell you the specs of the filters.
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