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Hi, I've tried IF frequencies of 19 MHz , 26 MHz, 12 MHz ... Basically any frequency I could think of .. None of them work the? BITX-40 on LSB, The frequency of 19 MHz results in basically a dead radio, No RX At all , Same goes for 26 MHz, It's a strange one, This SDR kits VFO works fine, It looks good on the scope and goes upto 160 MHz easily.. But it just won't work on the BITX-40 ..

Marc? 'Gw0wvl'

On Wed, 8 Feb 2017 at 14:14, Ashhar Farhan

<farhanbox@...> wrote:

If you set the VFO frequency to 26 MHz, the sideband is automatically inverted. You will not need to move the BFO from LSB to USB for 14 MHz.

- f

On Wed, Feb 8, 2017 at 7:13 PM, Marc Jones via Groups.Io <gw0wvl@...> wrote:

Hi Joel, I've tried all sorts of different frequencies in the IF fir the SDR VFO, If I take? the frequency just below 12 MHz all that happens is that? Transmit /Receive frequency is off by a few KHz .. Etc... So the display on the SDR kits VFO might show 7.100 but I'm actually on 7.098 .. But still on USB . and visa versa ..but all the time it USB..

Marc Gw0wvl

On Tue, 7 Feb 2017 at 14:12, Raj vu2zap

<vu2zap@...> wrote:

Oops it was 11.998500

At 07/02/2017, you wrote:

What worked for me is 1.99985

At 07/02/2017, you wrote:

Mark,

You need to set the IF to 11998000 because you subtract the BFO frequency from the IF.

Joel

KB6QVI

On Feb 7, 2017, at 5:46 AM, Marc Jones via Groups.Io < gw0wvl@...> wrote:

I've recently built a SDR kits VFO (3.5 to 160 MHz) .. It's working fine, But when I connect it to my BITX-40 the LSB is flipped to USB .. I've put the IF as 12.0 MHz and the VFO range is 4.8 -5 MHz .. To cover 7.0 -7.200 ... Any ideas why it flips the Sideband ?

Regards Mark