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I recently did a DIY u87 type build to the Aurycle a460. I swapped out almost all of the components with parts I purchased from mouser and a used an Advanced Audio AK67. After finishing the build and plugging it in, I got no sound at all from the capsule. I removed the wire from the backplate and screwed it into a different hole on the capsule. After powering it back on, I started to get sound...but here's the thing...I have to max out my gain on my preamp in order to hear an audible voice through it. If I tap hard on the grill I don't hear any "thumping" noise at all 90% of the time. But if I keep tapping, the mic will clip and pop then all sound drops out and comes back. Also, if I slightly brush my finger along the red wire connected to the capsule, I can hear it loud and clear. Also, the 10dB pad seems to be doing nothing at all in respect to volume. I am pretty lost as this is my first build and I am not very savvy yet with all of the terms used with microphone building. I do have a trim pot in R6 at the moment as I was going to bias the fet but wasn't able to make it that far yet. Below is a copy of original BOM and attached is the BOM I used instead; also the schematics. If anyone can please help point me in the right direction as to what to do it would be EXTREMELY appreciated! Thanks.

R1 Resistor 1/4W 6.8K
R2 Resistor 1/4W 560
R3 Resistor 1/4W 1M
R4 Resistor 1KM
R5 Resistor 1KM
R6 Resistor 1/4W 2K-3.9k
R7 Resistor 1/4W 1.8K
R8 Resistor 1/4W 20K
R9 Resistor 1/4W 180K
R10 Resistor 1/4W 7.5K
R11 Resistor 1/4W 2.2K
R12 Resistor 1/4W 2.2K
R13 Resistor 1/4W 47 R14 Resistor 1/4W 47
R15 Resistor 1/4W 150K
R16 Resistor 1/4W 150K
R17 Resistor 1/4W 330K
R18 Resistor 1/4W 4.7K
C1 Capacitor CBB 0.01μ
C2 Capacitor NPO 1000P
C3 Capacitor NPO 220P
C4 Capacitor CA42 22μF/16V
C5 Capacitor 0.47μ
C6 Capacitor CBB 0.047μ
C7 Capacitor CBB 6800P
C8 Capacitor CA42 4.7μF/35V
C9
C10 Capacitor 330P
C11 Capacitor 330P C12 Capacitor CA42 6.8μF/40V
C13 Capacitor CA42 2.2μF/50V
C14 Capacitor CA42 2.2μF/50V
CF Capacitor CC1-150p
D1 FET 2SK170
D2 Transistor 1015
L1 Inductor 47μH
L2 Inductor 47μH

<blockquote data-quote="Roachbeatz" data-source="post: 956642" data-attributes="member: 83582">I recently did a DIY u87 type build to the Aurycle a460. I swapped out almost all of the components with parts I  purchased from mouser and a used an Advanced Audio AK67. After finishing the build and plugging it in, I got no sound at all from the capsule. I removed the wire from the backplate and screwed it into a different hole on the capsule. After powering it back on, I started to get sound...but here&#039;s the thing...I have to max out my gain on my preamp in order to hear an audible voice through it. If I tap hard on the grill I don&#039;t hear any &quot;thumping&quot; noise at all 90% of the time. But if I keep tapping, the mic will clip and pop then all sound drops out and comes back. Also, if I slightly brush my finger along the red wire connected to the capsule, I can hear it loud and clear. Also, the 10dB pad seems to be doing nothing at all in respect to volume. I am pretty lost as this is my first build and I am not very savvy yet with all of the terms used with microphone building. I do have a trim pot in R6 at the moment as I was going to bias the fet but wasn&#039;t able to make it that far yet. Below is a copy of original BOM and attached is the BOM I used instead; also the schematics. If anyone can please help point me in the right direction as to what to do it would be EXTREMELY appreciated! Thanks. R1 Resistor 1/4W 6.8K R2 Resistor 1/4W 560 R3 Resistor 1/4W 1M R4 Resistor 1KM R5 Resistor 1KM R6 Resistor 1/4W 2K-3.9k R7 Resistor 1/4W 1.8K R8 Resistor 1/4W 20K R9 Resistor 1/4W 180K R10 Resistor 1/4W 7.5K R11 Resistor 1/4W 2.2K R12 Resistor 1/4W 2.2K R13 Resistor 1/4W 47&nbsp; &nbsp;&nbsp; R14 Resistor 1/4W 47 R15 Resistor 1/4W 150K R16 Resistor 1/4W 150K R17 Resistor 1/4W 330K R18 Resistor 1/4W 4.7K C1 Capacitor CBB 0.01μC2 Capacitor NPO 1000PC3 Capacitor NPO 220PC4 Capacitor CA42 22μF/16VC5 Capacitor 0.47μC6 Capacitor CBB 0.047μC7 Capacitor CBB 6800PC8 Capacitor CA42 4.7μF/35VC9C10 Capacitor 330PC11 Capacitor 330P&nbsp; &nbsp; C12 Capacitor CA42 6.8μF/40VC13 Capacitor CA42 2.2μF/50VC14 Capacitor CA42 2.2μF/50VCF Capacitor CC1-150pD1 FET 2SK170D2 Transistor 1015L1 Inductor 47μHL2 Inductor 47μH</blockquote>

[QUOTE="Roachbeatz, post: 956642, member: 83582"] I recently did a DIY u87 type build to the Aurycle a460. I swapped out almost all of the components with parts I purchased from mouser and a used an Advanced Audio AK67. After finishing the build and plugging it in, I got no sound at all from the capsule. I removed the wire from the backplate and screwed it into a different hole on the capsule. After powering it back on, I started to get sound...but here's the thing...I have to max out my gain on my preamp in order to hear an audible voice through it. If I tap hard on the grill I don't hear any "thumping" noise at all 90% of the time. But if I keep tapping, the mic will clip and pop then all sound drops out and comes back. Also, if I slightly brush my finger along the red wire connected to the capsule, I can hear it loud and clear. Also, the 10dB pad seems to be doing nothing at all in respect to volume. I am pretty lost as this is my first build and I am not very savvy yet with all of the terms used with microphone building. I do have a trim pot in R6 at the moment as I was going to bias the fet but wasn't able to make it that far yet. Below is a copy of original BOM and attached is the BOM I used instead; also the schematics. If anyone can please help point me in the right direction as to what to do it would be EXTREMELY appreciated! Thanks. R1 Resistor 1/4W 6.8K R2 Resistor 1/4W 560 R3 Resistor 1/4W 1M R4 Resistor 1KM R5 Resistor 1KM R6 Resistor 1/4W 2K-3.9k R7 Resistor 1/4W 1.8K R8 Resistor 1/4W 20K R9 Resistor 1/4W 180K R10 Resistor 1/4W 7.5K R11 Resistor 1/4W 2.2K R12 Resistor 1/4W 2.2K R13 Resistor 1/4W 47 R14 Resistor 1/4W 47 R15 Resistor 1/4W 150K R16 Resistor 1/4W 150K R17 Resistor 1/4W 330K R18 Resistor 1/4W 4.7K C1 Capacitor CBB 0.01μ C2 Capacitor NPO 1000P C3 Capacitor NPO 220P C4 Capacitor CA42 22μF/16V C5 Capacitor 0.47μ C6 Capacitor CBB 0.047μ C7 Capacitor CBB 6800P C8 Capacitor CA42 4.7μF/35V C9 C10 Capacitor 330P C11 Capacitor 330P C12 Capacitor CA42 6.8μF/40V C13 Capacitor CA42 2.2μF/50V C14 Capacitor CA42 2.2μF/50V CF Capacitor CC1-150p D1 FET 2SK170 D2 Transistor 1015 L1 Inductor 47μH L2 Inductor 47μH [/QUOTE]

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