Re: [Discuss-gnuradio] RFX400 address@hidden

[Glenn Richardson]

Hi Mathias,

Yes, I have.  However to get it to really work at ~150MHz, I had to 
change the VCO with an ADF4360-8.  After the tricky job of removing the 
original VCO, you also have to modify the db_flexrf files such that it 
configures the VCO dividers correctly.  We did finally get it 
transmitting in the 145MHz ham band.

If there is additional interest in this band, I would love get a patch 
summited with these code changes, particularly if we assigned this set 
of mods / board configuration with it's own ID such that both the 
standard flex400 and this modified flex200? would both work.

I don't have a list of the final mods handy, but I think there where 
various other filters at least that needed to be changed out. 

Glenn


Mathias Coinchon wrote:
> Hi,
>
> I am about to modify a RFX400 daughterboard to operate around 200MHz 
> by changing inductors as explained in the wiki.
>
> Has anyone tried this successfully before for frequencies below 300MHz ?
> I am doubtful about the final TX amplifier of the board (RF3315 from 
> RFMD) that specify a minimum frequency of 300MHz. Can it be pushed 
> down to 200MHz ?
> If not, does someone know a replacement amplifier circuit ?
>
> Thank you.
>
> Mc
> PS: Any news on the WBX0510 daughtboard (50MHz-1GHz) release plan ?
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