Help Identifying SMD SOT89 device

K2 SOT89 2SK2742 Toshiba.

RL

Heu Legg, I don't see any text in the body of your post. Will you try again. Mikek

Data sheet for 2SK2742 says: Chopper Regulator, DC?DC Converter and Motor Drive Applications

OK, I changed computers and now I see your post.

The dimensions of the device in my circuit are 4.3mm x 2.44mm x 1.4mm. That is smaller than the 2SK2742 dimensions, also the tab on top is wider on the k2092 device than on the 2SK2742. Others have said it is a 2SK2092, I can't find any such part.

Still need more help. Mikek

I'm not sure it will have what it needs at 108MHz. Mikek

Appears to be an obsolete Mitsubishi MOSFET RD01MUS1

"APPLICATION For output stage of high power amplifiers in VHF/UHF Band mobile radio sets"

Unfortunately the datasheet fails to indicate how they mark the d*** thing:

However this excellent product manual for the iCOM IC703 shows the code and package for the RD01MUS1 match (page 2).

Product page (no datasheet link because it's obsolete..):

They seem to be 'available' but from sketchy sources so who knows what you would actually get.

--sp

Thanks Spehro, that's seem like the best lead I have received. I'll search for a source and/or a sub. I found them on Ebay, I ordered 5 for $6.20 including the $2.50 shipping. Mikek

K2 SOT89 2SK2742 Toshiba.

RL

It is probably a MMIC "Gain Block Amplifier."

For example:

That will do 200 mW into 50 ohms.

NXP has some MMICs with concise marking. I don't see any with that particular marking.

You have not read the entire thread, have you?

Probably not. The package marking does not correlate.

No other traffic for this thread on my news server. Not even a reply, identical made on the 23rd.

RL

That's strange, I can only see your posts on my laptop, but not on my tower. Same with John S's first post.

"Probably not"... what? Correlate with what?

It looks like a transmission line going in and then out. A zoom out would be nice.

I'm not saying it is the ECG008B-G. That was just an *example* of a MMIC that can be used for exactly the purpose given, and comes in a SOT89. If it was more than an example I would not have mentioned the following NXP MMICs.

Well, Simon, the part has a marking. If you look at the data sheet of the part you suggest, you will see that the package marking is completely different from the OP's post.

You should probably read the entire thread and particularly Spehro's post.

I have the parts Spehro suggested on order. It does seem strange that I cannot find a code book that crosses to the right part. I search pages deep in code books and never found what I hoped for. But, I like that Icom showed the part the way they did.

Mikek

Obviously. Since t0, obviously.

SMT code books are very sparsely populated matrices. Sometimes I go looking for a part because it's obviously inexpensive and does the job, and more times than not it takes some sleuthing.

--sp