[DEMI] 2304 MHz Transverter (Old)

[Zack Widup]

I highly recommend making the mods Steve has on his website using the ERA
devices and MGA86576.  This involves cutting a couple of the lines.  Mine
works very well after performing those mods.

73, Zack W9SZ


On Thu, 14 Aug 2003, Kevin Murphy wrote:

> Hi 
> I have recently done some work on a older 2304 DEM transverter. One of
> the problems I found was instability (Haha) on the LO,RX and TX strips. 
> One of the problems was adjacent striplines to the hairpin filters
> causing suckouts. The LO had about a < 6 dB suckout (notch) caused by
> the adjacent stripline being about 1/2 wavelength. I added a SMD 100 pF
> to ground at the centre of the stripline using a veropin/rivet/wire and
> additional 100 pF's to ground at the Lo-Z ends of the stripline. The
> 100pF at the centre of the stripline caused the LO filter response to
> flatten out and gave about 2 dB loss instead of about 6 dB.