OP1 and CW filter gain difference?
Posted by
Marteinn Sverrisson on
Apr 08, 2005; 4:49pm
URL: http://elecraft.85.s1.nabble.com/OP1-and-CW-filter-gain-difference-tp376780.html
Hi All
I was measuring the gain difference of the OP1 x-tal filter and the
CW filter on my K2.
It seems that the OP1 filter has +10dB more gain than the CW filter
I have the 2.5kHz OP1 filter mod and the stock CW filter on 2.4kHz.
Measurements are done on 7 MHz band on LSB.
I did the measurements with AGC off, using noise gen and audio
spectrum analyzer.
Is this normal?
Should I look for some bad X-tals or varicaps in the CW filter?
73 de TF3MA
PS. same results if I unmodule the KSB2, the gain is still low.
--
Marteinn Sverrisson TF3MA
Langitangi 2 Internet: tf3ma [at] raunvis [dot] hi [dot] is
270 Mosfellsbær
http://www.raunvis.hi.is/~tf3ma Iceland
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