1:04
Using LM386 with the differential circuit of op amp 741d.
8 views • 11 hours ago
0:44
NJM2073D stereo amp
22 views • 1 day ago
1:18
triple LM386 :stereo amp
170 views • 2 days ago
0:56
TDA7268 stereo amp : 1 chip for stereo
21 views • 3 days ago
1:00
LMC555で変調テスト
224 views • 5 days ago
2:03
3 tubes wireless-mic(no,90). D.I.Y : using p.c.b
73 views • 7 days ago
1:35
cw training unit on FM radio .
74 views • 2 weeks ago
1:19
melody IC SM6201-2L sound D.I.Y
152 views • 3 weeks ago
1:19
TDA7267 stereo amp with D.I.Y supply
36 views • 4 weeks ago
0:54
TDA7267 stereo amplifier D.I.Y
59 views • 1 month ago
0:39
first testing about sm6201 melody IC
158 views • 1 month ago
1:33
JF1OZL style .Emitter-follower-power-amplifier type2. RK-284v2 with AC supply.
97 views • 1 month ago
1:34
JF1OZL style .Emitter-follower-power-amplifier type2. RK-284v2
63 views • 1 month ago
0:34
TDA7052 single amp ; frequency characteristic flat to 400kHz
62 views • 1 month ago
3:57
melody ic um3512 , checking my p.c.b on may 10th
173 views • 1 month ago
3:17
JF1OZL style .Emitter-follower-power-amplifier. test2. This model is RK-284.
70 views • 1 month ago
1:13
D,I,Y. three tube wireless mic( one board wireless mic ) :testing at apr/30/2024
70 views • 1 month ago
0:55
D,I,Y. three tube wireless mic( one board wireless mic ) :testing.
97 views • 1 month ago
2:24
JF1OZL style .Emitter-follower-power-amplifier.
105 views • 1 month ago
1:42
Emitter-follower-power-amplifier. JF1OZL style.
57 views • 2 months ago
1:53
sepp amp d.i.y : Imitating chriskit p-35. A1359/C3422
62 views • 2 months ago
1:26
twin 6EW6 radio ( RK-283 ) :d.i.y 2024/april/13
416 views • 2 months ago
1:26
melody IC :SVM7993 sound
144 views • 2 months ago
2:41
melody IC : HK322-6 sound
354 views • 2 months ago
3:06
sepp amp d.i.y : Imitating chriskit p-35:max out put 125mW (9V supply) d.i.y
263 views • 2 months ago
0:46
kp-12a checking audio freq response (no sound)
121 views • 2 months ago
0:35
Searching for the optimal resistance value for osc strength. 22.00MHz
143 views • 2 months ago
1:48
cascaded OP AMP + booster (2sa1394+2sc3422)
108 views • 3 months ago
1:00
12AU7 + cascaded OP AMP + booster (2sa950+2sc2120)
184 views • 3 months ago
1:46
FM stereo demodulation TDA7040 drives TDA7050
91 views • 3 months ago
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