Yes Jerry, The SDR kits VFO appears to be working as it should, It corresponds with my external counter , No problem at all , It's also not the BITX-40 , If I unplug the ?SDR kits VFO and plug in the Digital Raduino VFO that came with the BITX-40 it's immediately back on LSB... Unplug the Raduino and plug the SDR kits VFO back in and it's back to USB ... It's very strange ..
Regards?
On Wed, 8 Feb 2017 at 20:04, Jerry Gaffke via Groups.Io
<jgaffke@...> wrote:
In your last post, you say: ? "The actual VFO output is doing as it should according to the scope and frequency counter"
By that, do you mean that you measured the frequency, and verified it is at 5mhz? ?If so, then the only way I see for it to be on USB is if the BFO got moved, perhaps by adding capacitance at C103. ?If that's the case, then either restore the BFO to where it was out of the box (move it back up in freq by about 3khz), or move your VFO to 19mhz (no offset, 19mhz as measured with the scope at the VFO output).
Jerry
On Wed, Feb 8, 2017 at 11:43 am, Jerry Gaffke wrote:
Did you use your scope to check the frequency coming out of the VFO? ?I'm betting it is up at 19mhz, not 5mhz.
?
Marc Jones