I am looking to do my first mic modding project, I would like to work on the sp1 I got the files posted by zapnspark which are great, I am curious what other...
... work ... so ... I can't speak about the usefulness of some of the other China mic mods that are floating around on the internet. For specific information...
Dear Mark, Without luck round here... I received your email, thanks, but my response (as before) was rejected. I received a detailed error message from your...
xhavepatiencex, The most basic mod is removing: R8-(1 gigohm) [SAVE for another project] & C13-(1 nF ceramic). Start there, no soldering skills required...
... Take ... Stay ... his ... The problem is that JFETs have a very wide range in parameters, even when they are of the same type and from the same batch. Here...
Hi everyone, Seen today at: http://www.mcamics.com/ Specs: Impedance: 200W ... 200 Watt ? No furthere specs there. I'd believe that MCA was a model from MXL,...
... What a concept! A microphone and a space heater ;-) They meant 200 ohms output impedance. ... There appears to be some sort of relationship between the MCA...
Jim, Could the circuit be modified for lower voltage operation and the scope substituted with a pc sound card running a scope application to visualise the...
... Mike, Very good suggestion. Using a PC soundcard and making an external stunt box for audio testing has been on my to-do list forever. I have played with...
No need to change the circuit voltages - just build a homebrew "10x probe" like the real scopes use. That's all of two resistors in series, say 100K between...
The reason for the resistor in parallel is for the PTT to work, if you put the resistor in series with the PTT will not work. ... [Non-text portions of this...
O. K. Here is the link for a free Winscope http://www.mitedu.freeserve.co.uk/Downloads/scope.zip Now, is a homemade probe necessary to measure an MCA SP-1? If...
NTE159s can be purchased as match pairs. Matched within 10%. These are the choice of the mp3forkidz.com guy Dave Latchaw. Might be why he uses them. ~Micro...
If you have a Scope and signal generator, use the test fixture and procedure shown in: BiasingFETScopeMethod.pdf Signal gen. and scope to select microphone...
NTE159's are listed as $1.75 each. The alternative is to get BC559C (or BC560C) at about 7 cents each. Then use a cheap meter that has an hfe measurement...
This is really interesting. I've been monkeying with DIY headphones, and would really like to be able to test them objectively. How much would it cost me to...
... Depends on your approach, casting your own ears using dental paste or moulding wax is one option but is riskey due to the implication of potential damage...
Hi all: I'm brand new here and am intrigued by the "partial mod" to the SP1 involving the removal of one cap and one resistor. (The rest of the mods are...
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