Hello.
I got a commercial RF-generator for ENI.
It has 4 power modules with two ENI21 transistors per module.
The ENI21 for sure is a Motorola device and due to the fact that each module
should bring up more than 300W with two of these ENI21 at a voltage of aprox.
50V up to max 30MHz I would say it should be the MRF448.
Am I correct ? Otherwise correct me !
Now my problem:
Looking into the shematic I see the MRFs in zero bias mode.
The base of each transistor is connected to ground and the modules just get the
50V. Nothing more.
I would like to cut the connection of the base to ground and spend some voltage
there to get a current flowing through the MRFs.
I found also an application in the Motorola application book, but maybe someone
has a nice design on his PC including shematic and maybe layout to make some
prints ?!?
I just have the 50V with looooooots of amperes in the generator to build the
bias voltage..... ;-)
Maybe I can also place a very small second trafo inside, which should be the
better solution maybe....
Jochen
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