Well Dave, You sound like you have a moderate amount of knowledge and I assume that you tried to locate a schematic. Draw the circuit from the pc board traces. Look at the holes where the transistor was and draw a circuit as you follow the traces. Will your "guessed" transistor fit this circuit? Good Luck, Tom
I hope this is the right group for the question I have to post. If not,
me know, and I will skeedaddle.
> I am trying to repair a 20-year-old Uniden handheld CB transceiver, which
*think* has the finals blown. My neighbor picks up no signal when I
> transmit to him from about 50 feet away, but my shortwave radio picks up
transmission from only a few feet away. I can't find my wattmeter as most
> of my electronic stuff is still packed and in storage (we recently had to
> abandon house for two months.) I do have my oscilloscope and DMM, plus a
> few other odds and ends that never got packed. I *think* I have located
transistor that acts as the final amplifier and have removed it from the
> circuit. It is a TO220 style, and the only markings on it are "2029C/1".
> Am I safe in assuming that this is basically a 2SC2029, or some other
> compatible? My only clues to the identity of this puppy are its physical
> location on the board (near the antenna connection) and the fact that it
surrounded by several small (3/16" x 5/16") coils. I do*not* want to just
> stick another transistor in there in its place and try to transmit, but I
not sure of where to start with my analysis (it's been a long time since
> I've done anything quite like this.) Oh, one more thing, this CB has a
> seven-inch long alluminum heatsink running the length of the PC board, and
> this transistor and one IC (at the other end) are the only things on it
other words, there are no other power transistors in the circuit).
> Should I proceed with a 2SC2029 or an equivelant? What do others think?
value your opinions, and any help would be appreciated.