RE: [drakelist] Tr-4 problem again

[Laird Tom N]

I have worked on two TR-4's that had one of the two SSB filters bad. They had somehow drifted off center frequency. I replaced them with INRAD filters (I believe) which worked fine, but if I recall, they were slightly wider in bandwidth.   Your Milage May Varry.   Tom WC9M Moline, IL. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Karl Corder Sent: Monday, December 19, 2005 10:15 PM To: drakelist Subject: [drakelist] Tr-4 problem again I have tried  adjusting the balanced modulator and the carrier (c130)and neither one will allow the sideband switch in the X position to give me any drive at all beyond the .1 miliamps. With the sideband switch in the NON X position I can get drive and adjust the resting drive current to the .15 as they recommend. I cannot get equal noise pitch using the C130. As long as the sideband switch is in the NON X position and the other switch is in the X-CW position I can get drive but as soon as I put the ssb switch in the X position there isn't any drive from the rf gain control.   Does this mean that one or both of the ssb filters have croaked? I can hear (make out signals in the lower sideband but they are poor and hard to tune in the audio isn't good at all, it is bassy and the usb mode is Hissy( can't change it to bassy or bassy to hissy).   Appreciate any recommendations? Karl Corder wa20vj