Re: 2N2222A vs 2N3904 sourcing
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I have ordered many small parts off ebay from China.? One has to be very careful as there seem to be many substandard parts.? You may get a good batch from one source and a bad batch from another.
I have some RF power transistors of the 10 to 20 watt range.? They do now work at 10 MHz and above at all.? They do seem to work ok at DC and audio frequencies.? So will use them in audio output circuits.
de ku4pt
On Fri, Sep 14, 2018 at 11:13 AM Warren Allgyer < allgyer@...> wrote: Sorry Iz, I mis-typed. It is the ERA-3SM+ that is available for less than 1USD on eBay. It is from a Chinese supplier so it will require due diligence in testing.?
? I have them on order for test.
I have a MMIC amp from SV1AFN with similar specs that I just tested. Very clean, 23 dB of gain. A two tone test showed it does IMD of -50 dBc at -5 dBm out. It did -24 dBc at +5 dBm out. I will run similar tests on the 70 cent chinese ERA-3SM upon arrival.
WA8TOD
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