Luke, Fairly sure that the TRany (I know the TR3 did) use the VFO and IF to create the 80 and 20 meter bands (aka 9Mhz - 5Mhz = 80 meters, 9Mhz + 4 Mhz = 20 meters). The other bands are gotten by adding a crystal oscillator to the mix. Use another RX to see if you hear the band crystal "note" when you have it on other bands.
So look at the schematic and find the tube or transistor that is the xtal band osc. Drake's manual is pretty good on generally what is doing what and the theory of operation. Put a loop of insulated wire around the osc active device and into the antenna input of your receiver you are using to check the osc. You should hear a "note" on the frequency listed on the xtal give or take a little bit. It really sounds like you band osc is not osc, or the mixer is not mixing. But check the osc first. 73, Ron WD8SBB --- On Mon, 12/7/09, Luther Nallie <[email protected]> wrote: > From: Luther Nallie <[email protected]> > Subject: [Drakelist] TR4Cw band problem: > To: [email protected] > Date: Monday, December 7, 2009, 3:35 PM > > > > > > I just acquired a TR4C/w and everything works great > except the only bands that work are 80m and 20m. I > don't get anything on the other bands and was wondering > if somebody could give me a starting point to try to find my > problem. I know how to use a VOM and soldering iron > and have worked on guitar amplifiers, etc. but not real > sharp about radio gear. I can read a schematic. > Thanks for any advice. > > > > Luke > > Get gifts for them and cashback for > you. Try > Bing now. > > -----Inline Attachment Follows----- > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist > _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
