Re: LF: FET driver driven direct from a Si5351a questions

[DAVE PICK <daveyxm@virginmedia.com>]

Chris

The squiggles don't look too bad, are you sure it's not just pick-up on the oscilloscope probe?
It makes a big difference where you put the earth clip in a high-current circuit.

Dave G3YXM

> On 12 October 2018 at 13:42 Chris Wilson <dead.fets@gmail.com> wrote:
> 
> 
> 
> 
> Hello David,
> 
> Thanks  for  the reply. I will try this I take it you just tie Input A
> and  Input  B together and feed it a x2 signal with X2 tone spacing if
> using  WSPR?  I  am  pretty  sure  there's  either  harmonics or another
> frequency  riding on CLK1 when in this new Iv mode so I am moving away
> from  that as you suggest.  I now have a refreshed set up whereby I am
> able  to use the TS-590 for sensible TX operation of JT-9 with either the
> Red  Pitaya  or  the  590  as  the  receiver.  So  when the LF antenna is
> operational at your end I should be able to work you :)
> 
> Thursday, October 11, 2018, 9:36:03 PM, you wrote:
> 
> > Hi Chris.
> > Not sure I have a solution for the circuit you have.  
> 
> > However, it may be worth not using the 180 degree outputs from the
> > Silab oscillator.  Have you thought about the advantages of a FET driver
> > that has a common input but 2 antiphase outputs ??
> > The TC4428 is an example. They take great care with rise times and
> > propagation delays....perhaps the Si device does not give 'perfect' waveforms.
> 
> 
> > Worth a try ??
> 
> 
> > regards
> 
> 
> > David
> 
> 
> 
> 
> -- 
> Best regards,
>  Chris                            mailto:dead.fets@gmail.com
> 
>