Hi Jose, If you trace out the power feed (the bottom direction from the coax connection) it supplies the transistor (most likely a MMIC) and the black 6 legged active device (no idea on it). The silver square looks like a filter device of some sort between what you call the transistor and the 6 legged active device. The silver square has no voltage going to it.
The 30 milliamps does not sound out of range to me, but then I have no experience with the hp system. What makes you think it is the antenna that is the problem ? If the voltages appear to be about right (your statement) my guess would be that the antenna might be working correctly. So I would not be shorting anything out without getting a lot more information first. Is there anyone else in your area that has such a system that you could compare with ? Good luck, 73....Bill....WB6BNQ Jose Manuel wrote: > Hello all, > > I´d like to repair a HP58504A antenna that don´t deliver any output signal. > The current is about 30 mA ( I think too high), and the transistor (unknown > type) and the MMIC (uPC2749TB), seems to be with correct voltage. > > Does anyone have any experience or data about this antenna? > > I took an inside photo: http://www.ea1px.es/HP58504A.jpg Can the > transistor be identified by the color code? > > Thanks in advance, José, EA1PX > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
