Marteinn, The CW filter has a greater signal loss than the OP1 filter mainly because of it's varicap variable bandwidth design. My K2 has about a 6dB loss relative to the OP1. Your CW filter loss of 10dB may be a bit high. I would check the varicap lead orientation.
73 Stewart G3RXQ On Fri, 8 Apr 2005 15:49:53 +0000, Marteinn Sverrisson wrote: > 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. _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
