[TenTec] rick's recalcitrant 515

[Steve Hunt]

Rick,

That was the only option I could come up with that met the observed 
symptoms!

However, I dismissed it because I didn't think enough of the 5MHz-5.5MHz 
PTO signal would make it through the MC1496 PTO/XTAL balanced mixer to 
provide a viable local oscillator. On 20m - when they use the PTO signal 
directly for the Local Oscillator - they switch it directly to the LO 
buffer, completely bypassing the MC1496.

It'll be interesting to hear if the rig does tune "the wrong way" - that 
would be further evidence that the LO is wrong. A quick check if you 
hear CW signals at the 'phone end of 80m and vice-versa might confirm it.

73,
Steve G3TXQ


On 06/09/2016 06:33, rick at dj0ip.de wrote:
> THIS MAKES SENSE!  It is the only plausible thing that can be going on
> because from the logic standpoint, everything is switching as it should.
> That will be an easy fix, once I can make time, clean the workbench to make
> room, etc.
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt, Germany)
>
>
>