Hey everyone!

I was hoping someone has encountered one of these radios and can explain so
mething to me.

I am working on a transmit problem on a HR2510. The first step that is req
uired is to check the idle current on the MRF477. At present I am getting
O MA DC on the test points (removing the thin conductive board that slips b
etween them).

The sites I have been visiting says I should be getting 50 ma and to adj th
e pot till I get the 50 ma current.

Looking at the manual the MRF447 is suppose to have 13 volts on the collect
or.. which is there and zero volts on the emitter and base.

I am not understanding how I can get 50ma when I have zero volts on the Bas
e of the transistor? I do get a little bit of current when I push in the t
ransmit button but the instructions are pretty explicit that I should be in
the receive mode, AM and at 30MHZ.

I have already replaced the MRF447 as well as the driver to the MRF447.

Could someone explain the theory behind the circuit and how I am suppose to
get the 50ma on the test points?

Any help would be GREATLY APPRECIATED.


THANKS SO MUCH IN ADVANCE.

If you need to look at the schematic it is available

http://www.cbtricks.com/radios/uniden/hr_2510/

the procedure for aligning the radios transmit section is there as well.


Thanks so much

Gerald Rego
AK4YM