[Elecraft] Alignment and Test, Part II

[HB9DUT]

Hello Jim,

yes i have a O'scope.
I mesured the following Signals:

U4 Pin 4:   1.2Vpp sine form
U3 Pin 3:   0.8Vpp sine form
U3 Pin 6:   1.6Vpp sine form

is this ok?

73 de Peter

k4zm schrieb:

> Peter:
>
> Do you have an O'scope?  It appears that you have no input to Pin 4 if 
> U4 which is the output of the VFO that mixes in the Synthesizer.  With 
> a scope you could trace back to see where the signal stops.  Look at 
> Pin 6 of U3 and Pin 3 of U3. The synthesizer is not in a locked 
> condition so that means that the chip is not getting one of the 
> required signals.  Since the Ref Osc is ok and has the proper range I 
> thing the problem lies in the VFO or Buffer circuit or maybe even the 
> VFO ALC circuit.
>
> 73
> Jim Younce K4ZM
> K2  SN:18
>