Glad I had both you and the list in my reply - seems zerobeat is now sending my messages to Spam Purgatory for some reason. I shouldn't be surprised: my whole week has been like that.
I am with you, though, that there's probably an issue with the connections. The filter seems to be behaving properly aside from the tremendous insertion loss. The receiver itself has seen a bunch of modifications, so there well could be something that got disturbed. I'll be working to get it working as best it can - including trying to exorcise the tremendous amount of hiss in the audio. The weather is entirely too nice right now for me to be in the house when I get home, so this will probably wait until the weekend - when the temps are supposed to drop and it's supposed to rain some more. I am still trying to remember why I saw a 150 resistor on the back panel of my first R-4C, under the filter cover... 73, Steve, W1ES/4 -----Original Message----- >From: Garey Barrell <[email protected]> >Sent: Feb 2, 2012 11:54 AM >To: [email protected] >Cc: Drakelist <[email protected]> >Subject: Re: [Drakelist] R-4C 2.4 filter bad? > >Steve - > >Well, I'm 0 for 2. The 2.4 kHz filter has a pin and a stud at each end, while >the SSB/CW filters >have two pins at each end. Sorry. You can probably hold the filter in place >on one of the sockets >to check it, but ... > >I still suspect the coax from the filter or the switch.... > >73, Garey - K4OAH >Glen Allen, VA > >Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line >and TR-4/C Service Supplement CDs ><www.k4oah.com> > > >Bob Loving wrote: >> Steve, I think Garey meant that the 2nd IF filters in the R-4C, like the >> filters in the TR-7, are >> all designed for 50-Ohm terminations. That makes them quite easy to test >> outside of the receiver >> or transceiver (or test the antenna to filter input or the filter output to >> speaker paths). The >> 8-kHz wide roofing filter and any of the Sherwood or Inrad substitute >> roofing filters are designed >> for the 1-kilohm terminations mentioned by Garey. Any substitute 2nd IF >> filters are 50-Ohm designs. >> >> Bob K9JU >> >> _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
