Hi Ed, yes, the TCXO is 12.8MHz and I have the service manual, but as I don't know if my programming is correct I don't know if it make much sense to check some points but I'll do later.
I also ordered a few new eproms, maybe they are old and sometimes not completely empty after erasing. The crazy thing is, I cant run neither the TX nor the RX unit. 73 Bernd DM5BM --- In [email protected], wa6rqd <[EMAIL PROTECTED]> wrote: > > Bernd Maestling wrote: > > Hm, > > > > the HEX file looks like yours. The 5.2V at L1 don't change > > when I rotate the capacitor, so I think there must be > > something unlocked or wrong. The only thing that is changing > > is the red LED on the front going to light in TX mode and the > > current increases from 0.1A to 0.3A. > > > > With my counter I can measure frequencies between 400 and 500MHz > > at the measuring point in the first stage. It will change when > > I rotate the capacitor. > > > > 73 > > Bernd > > > > Bernd, > > The TX should draw much more than 300 mA when in TX. If the synthesizer > is not locked, the output section will be disabled to prevent > transmitting off channel. Not sure how the voltage is staying at 5.2V if > it is unlocked. Try flipping DIP switch 8 to off and power the T856 off > and on again. Check TP12 (VCO Lock Detect). It should be low if the > synthesizer is in lock. > > Do you have the manuals? > Is your TCXO 12.8MHz? > > Ed Yoho > WA6RQD > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
