Simple solid state circuit for K67?
« on: February 25, 2019, 11:46:57 AM »
I have a few cheap chinese but not-too-awful-sounding K67 on my desk, but I have yet to work with any circuit with de-emphasis.

Are there any simple solid state circuits out there that would fit the K67, preferably electronically balanced (But not a must), maybe even some readily available PCBs?

Thanks

GB



Re: Simple solid state circuit for K67?
« Reply #1 on: February 25, 2019, 12:51:40 PM »
Built this circuit recently, and it fited sm57 type of body. Sounds great, and you don't really need a pcb.

http://www.audioimprov.com/AudioImprov/Mics/Entries/2017/5/7_Schoctava%2C_a_simple_mic_circuit.html

rogs

Re: Simple solid state circuit for K67? New
« Reply #2 on: February 25, 2019, 04:00:26 PM »
I tried out that unbalanced circuit from Henry linked to above, but had some very strange noise problems with using one 'side' of the phantom power just for capsule bias?

In the end - and for only a couple of pounds extra cost, component wise - I stuck with my own simple balanced  'Schoeps' type circuit....copy attached ( just link out R4 and R5 - and don't fit C7 - for lowest noise 'flat' response) .
I personally think the few extra components needed to balance the output are worth the money - and the external  capsule  bias voltage multiplier can be a nice cheap way of providing some extra 'noise free' gain!

(No PCB, but some extra construction notes here:  http://www.jp137.com/lts/LDCX2.notes.pdf  )

« Last Edit: February 27, 2019, 05:36:14 AM by rogs »


 

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