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JLM99MBv2 Mic Pre Kit

JLM99MBv2 Mic Pre Kit
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Input Transformer (Required)
1. Opamp (Required)
2. Opamp (Required)
Output Transformer (Required)
Power Supply (Required)

$104.50AUD inc GST for Australian Customers
(Approx $66.52USD outside Australia)
Change currency to see all prices including options in your preferred currency.

Product Information
Stock Level30

The JLM99MBv2 PCB for the JLM99V which can take several transformers from manufacturers like OEP, Lundahl & Jensen. The board also has NE5534A DIP8 sockets so it can be fully tested with cheap IC's before installing the 99V. The PCB can be used for building the simplest NE5534A, OPA604A or 99V, 990, 992 ,993, 2520 circuit or all the way up to Jensen Twin Servo design. PCB has provision for 3 pushbuttons switches or relays for 48v, PAD & Phase on one edge. The relays run from a constant current source so more relays can be easily wired in series for extra features without making noise on the audio power rails. Comes with small JLMSWMBPCB is the which takes three toggles and LED's to control the relays if used by 4 wires. New Red version 2 pcb has 10 pin IDC plug doe quickly adding our FETDI as well.

Requires +/-V and 48v to run so our AC/DC power supply is perfect for this. 

JLM99*MB is 5.4" (137mm) x 2.3" (59mm).


Input Transformers the PCB can take directly are

  • JLM1:4(comes with 2 x 3mm bolts and 2 x plastic bushes which hold the transformer 1mm off the PCB)
  • OEP A262A2E, A262A3E, A262A6E, A262A7E
  • Lundahl LL1538, LL1538XL, LL1576, LL1577, LL1578XL.
  • Jensen JT-11K8-APC, JT-110K-HPC, JT-115-EPC, JT-MB-CPCA
  • Remember to mount all transformers with a gap of about 1mm under them so any metal shields do NOT short out any of the PCB Pads.


JLMSW PCB is 1" (25.4mm) x 1.3" (32.7mm) with toggle holes spaced at 0.5" (12.7mm).



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