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#10
January 13th 07, 04:54 PM
posted to rec.radio.amateur.homebrew
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Ideal Ham Receiver (cont.)
Pete KE9OA wrote:
The only mechanical filters that I have seen problems with are the Japanese units that you find in the JRC receivers. There is some sort of foam that deteriorates over the years. I haven't seen a problem with Collins filters. I have an old Collins filter made for the R390 series receivers. It is a cylindrical filter with two pins at each end for connections. I can hear something rattling around inside this filter as I tilt it from side to side. Has something deteriorated inside this filter or is this normal? A later rectangular Collins filter does NOT make this noise. |
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