Someone sent me some transistors to test, this is the updated
results with a few more transistors added to the list. As a
reminder of past tests, this tests a "half LZ1AQ" low impedance
loop amp with the loop input terminated with a 2.5 uH T50-2
inductor that simulates the 39 inch diameter small loop--tested at
218 kHz for noise output. A low current Norton single transistor
amp tests the transistor for gain and noise figure at 10 MHz.
Should you have a favorite transistor you think is low LF noise
and/or low noise figure that's not on the list, send me one or two
(preferably two) and I'll test them and update this list. Contact
me privately for mailing address, ratzlaffsteve@...
Steve AA7U
|
LF Noise Output |
10 MHz gain, NF |
| 2SC5551 |
-92 dBm |
+10.55 dB, 0.93 dB NF |
| BFU590 |
-93 dBm |
+10.48 dB, 1.02 dB NF |
| BFP196 |
-93/-92 dBm |
+10.51 dB, 1.07 dB NF |
| BFG135 NXP |
-92 dBm |
+10.42 dB, 1.07 dB NF |
| ZTX327 |
-89 dBm |
+10.58 dB, 1.16 dB NF |
| fake China 2SC5551 |
-89 dBm |
+10.50 dB, 1.19 dB NF |
| 2SC3357 |
-89 dBm |
+10.45 dB, 1.20 dB NF |
| Chinese BFR96 |
-89 dBm |
+10.50 dB, 1.21 dB NF |
| BFR106 |
-90 dBm |
+10.51 dB, 1.23 dB NF |
| BFG591 |
-91 dBm |
+10.39 dB, 1.28 dB NF |
| PZT2222A |
-87 dBm |
+10.57 dB, 1.29 dB NF |
| MOT PN2222A "650" |
-87 dBm |
+10.56 dB, 1.32 dB NF |
| API MRF581 |
-88 dBm |
+10.49 dB, 1.34 dB NF |
| MOT PN2222A "329" |
-87 dBm |
+10.59 dB, 1.35 dB NF |
| MOT MRF517 |
-90 dBm |
+10.42 dB, 1.36 dB NF |
| BFQ18A |
-92 dBm |
+10.34 dB, 1.40 dB NF |
| CEN 2N5109 |
-88 dBm |
+10.49 dB, 1.43 dB NF |
| MOT 2N4401 "652" |
-87 dBm |
+10.54 dB, 1.45 dB NF |
| MOT MRF961 BFR96 |
-88 dBm |
+10.48 dB, 1.46 dB NF |
| MOT MRF571 |
-88 dBm |
+10.45 dB, 1.48 dB NF |
| RCA 2N3866 |
-88 dBm |
+10.45 dB, 1.48 dB NF |
| BFQ19 |
-87 dBm |
+10.50 dB, 1.51 dB NF |
| MOT MRF544 |
-92/-93 dBm |
+10.30 dB, 1.54 dB NF |
| CEN 2N3866 |
-88 dBm |
+10.45 dB, 1.57 dB NF |
| NEC 021 |
-87/-88 dBm |
+10.43 dB, 1.62 dB NF |
| MOT PN2222A "820" |
-85 dBm |
+10.56 dB, 1.73 dB NF |
| 2SC5706 |
-86 dBm |
+10.13 dB, 1.85 dB NF |
| MOT 2N5943 |
-86/-87 dBm |
+10.44 dB, 1.91 dB NF |
| PN2222A "327 S-92" |
-82 dBm |
+10.53 dB, 2.33 dB NF |
| 2N2222A "331" plastic |
-82 dBm |
+10.48 dB, 2.46 dB NF |
| ZTX325 |
-84 dBm |
+10.40 dB, 2.47 dB NF |
| KSP2222A "B24" |
-80 dBm |
+10.44 dB, 2.65 dB NF |
| PN2222A "H47" |
-80 dBm |
+10.44 dB, 2.72 dB NF |
| BFR90 |
-83 dBm |
+10.48 dB, 2.74 dB NF |
| PN2222A "D22" |
-81 dBm |
+10.43 dB, 2.75 dB NF |
| BF199 |
-86 dBm |
+10.46 dB, 2.82 dB NF |
| Fairchild PN2222A |
-81 dBm |
+10.48 dB, 2.93 dB NF |
| MPSH10 |
-88 dBm |
+10.44 dB, 3.05 dB NF |
| NSC PN2222A "806" |
-80 dBm |
+10.50 dB, 3.12 dB NF |
| metal 2N2222A "D9" |
-80 dBm |
+10.43 dB, 3.13 dB NF |
| metal 2N2222A "P6" |
-80 dBm |
+10.48 dB, 3.47 dB NF |
| 2N5179 |
-81/-82 dBm |
+10.35 dB, 4.16 dB NF |
| metal JAN2222 |
-79 dBm |
+10.45 dB, 4.21 dB NF |
| PN2222A "W 72" |
-72 dBm |
+10.43 dB, 4.27 dB NF |
| NSC PN3563 |
-80 dBm |
+10.35 dB, 4.80 dB NF |
