[VHFcontesting] Help - Need info on Motorola 900 Mhz 300w amp

[Radioman]

Jim,
i don't know about the switch's but it sounds like circulator is still 
in there, didn't you remove it?
i did the 150w PA with no issues, and the idle current is less then 1 
amp, sounds like there's too
much bias voltage and the filter is still in there, id try removing the 
filters just like the instructions on
the 150w say to do. the other thing is you could have a bad strip, you 
can isolate each strip if all else
fails

Tony
NN1D




Jim Erickson wrote:
> I have converted one of the Motorola 2 board 300w amps for 903 Mhz per
> the brief instructions on the VHF South web site.
> I am only getting 20 watts out with 4 watts of drive.
>
> Idle current is 2.2 Amps at 26 Volts with the PTT active.  With 4 watts
> of drive on 903 Mhz it draws around 10 Amps with only 20 watts out.  It
> draws up to 17 Amps with more drive but very little additional RF output.
>
> Does anyone know how the dip switches are to be set or what their 
> function is??
>
> Does anyone have any ideas?
>
> Jim K3LFO
> k3lfo at aarrl.net
>
>
> _______________________________________________
> VHFcontesting mailing list
> VHFcontesting at contesting.com
> http://lists.contesting.com/mailman/listinfo/vhfcontesting
>
>