The blue wire to the very left ( almost out of view on the PCB ) is the output.Â. For example, high-impedance capsule wires are extremely long, creating opportunities for interference, noise, and signal loss. As I experiment with caps down the road, if I find anything remarkable, I will update this page.Â, Note I did not place the feedback cap C3 back onto the board here, but rather moved it to the tube pins.Â, For the feedback cap C3, since the tube was strapped in parallel,  it gave me an opportunity to use the second triode tube pins to directly accommodate the much larger cap size. These are my favorite clips with this mic.Â, TECH NOTE - This is an Egnater Tourmaster. It actually uses the tube as the biasing and a FET as it's amplifier. Replace C7 with a high quality 2.2u 250V cap (film if you can fit - SEE UPDATE 1 at end of article)Â, 2. On the output connector I discovered two caps. If these cages are not in place the mic wont work correctly, or in some cases will not work at all  So you CAN'T test with the headbasket off. Is it really a different tube, or does it simply meet the long cutoff time specs without damage at those rated voltage levels?Â, In any case - for this mic, use whatever 12AX variant you like, or whatever you have on hand.  Sozo's take a really long time to burn in (up to 100hrs), but I gave it about an hour before trying it out.  in this case the back of the circuit board has many small wires and the likelihood of one or more popping off during work is high, particularly if you don't have schematics. In many cases, particularly with vocals, the effects of a small change may not be immediately apparent, however when you get the track into a mix you suddenly notice a larger difference in how the mix is coming together. V69 DIY Mod Do It Yourself Instructions The MXL V69 seems to be a very popular mic among low end enthusiasts.  (hopefully this article will not create a run on 5963's and thus drive up the prices ! However I measured them at 50n. Always take lots of pictures! It's also no fun to need a $.50 part and have to pay $10 shipping for it. The Omni switch works nicely (once I had troubleshot the cold solder joints on the switch I mentioned earlier. Well maybe a little bit in the high end which was more controlled on the K47 capsule. The MXL V69 ME, is a Chinese Manufactured Tube Mic. So I ran a wire to the correct end of R9 (closest to the screws that hold the board in place) and connected the other end of the wire to the cap and also to the wire from Pin1 of the tube to the same end of the cap.Â, There is a red wire that runs between PC boards where C7 connects up. For the feedback cap C3, since the tube was strapped in parallel,  it gave me an opportunity to use the second triode tube pins to directly accommodate the much larger cap size. I decided to try a .047u which is many times smaller than what came stock with the mic. A little hard to see but the pins on the right are reversed in the holes. I could certainly hear a bigger difference with the better pres but overall it was still not remarkable.  http://www.mark-o-matic.com/media/cap-cab.wav, Notice the reduced HF around 8K in the recapped version, but a slight boost at 4-5K. I found it slightly harder to set the levels because the mics were not reacting the same to changes in frequency as the vocalist sang.Â, To me, the mod now sounds a little bit clearer with more dynamic range,  making the original mic sound somewhat less exciting and dull by comparison. Interesting results. The vocalist liked the original mic better and claimed it has more of the old 50's lo-fi kind of  sound.  I have ordered some J309's and will give swapping that out a try.  To this day that is still my overall favorite mic in my locker. Free shipping. The J309, 310 have improved noise specs as well, but again depending on application may or may not be better.  Time is precious and I'd much rather pay a little more and get stuff faster from an easier to use/browse site like Antique Audio, or Parts Connexion, but they don't always have what I need. Ordering from places like Mouser, Digikey, Newark .. they have a lot of selection but it's sometimes overwhelming to the point where I've started saving part numbers and links in a spreadsheet like they were golden.  When looking at the, of the tube directly at the pins, the pins count clockwise.  I can't decide if the recapped mic sounds clearer, or if it's simply more scooped than the original.  If we assume a worse case scenario of 600 ohms output impedance that puts the rolloff frequency at about 10K. Chorus from Any More.Â, Acoustic - Stock - http://www.mark-o-matic.com/media/Acoustic-all-stock.wav, Acoustic - mods http://www.mark-o-matic.com/media/Acoustic-all-mods.wav, At this point Im starting to be pretty darn happy with how the modded mic is sounding.Â, Conclusions ? style: MXL V69M EDT Change. If you are shopping for DIY upgrade platforms, don't buy the V69ME. Once the signal path is clear you can start adding other mods as you chose and actually HEAR a significant difference with what you are altering.Â, Sourcing parts can be a big pain. Stay tuned.Â, I was thinking about how to fit a large film cap into the mic and I realized that I have been considering the sections individually but not the sum of all parts together. I opted to remove the spring from the white piece and extend it a little bit.  I had invested considerable time at this point, there must be an ultimate solution.Â, Follow the Signal - So I do know that after we have tweaked the tube end of things that the resultant signal goes into an output amplifier on the other side of the mic. The V69 back side showing final gain stage. That is C7 on the tube board, and C13 on the FET board. I also just happened to have a few extra of that value from working on an old Ampeg guitar amp.Â, Sozo's take a really long time to burn in (up to 100hrs), but I gave it about an hour before trying it out. MOGAMI® Edition Large Diaphragm Tube Condenser Microphone The V69M EDT is the result of years of research to create a large diaphragm tube condenser microphone that delivers the rich smoothness tube microphones are known for, low noise, and the warm but punchy forward character that captures mix … These are my favorite clips with this mic.Â, http://www.mark-o-matic.com/media/LouCabs-orig.wav, http://www.mark-o-matic.com/media/DrumRoom-C12.wav, ? Solder the red wire that was connected to the center of the old capsule to the same side (front  of mic) center wire from the new capsule. I have two V69 mics at my disposal so I decided to use the Panasonic for the first  mic, and I'll use the Nichion on the second mic.  But in this case there is no transformer, so as long as the silicone stages can handle it, thats just free gain as far as I'm concerned. by MXL. ), Switch access from inside the mic  Note the proper use of heat-shrink tubing on the connected wires as opposed to electrical tape.Â, If you don't have a heat gun for the smaller heat shrink tubing you can gently rub the upper (and cooler) portion of the soldering iron gently against the material.Â, With the new capsule in place I really was expecting to hear a pronounced difference. Input on errors I may have made or suggestions always welcomed. Our usual answer is, "this mic is too broken to fix."  I listened to one once and initially wasn't very impressed, but over time thought that maybe the mic is worth a second look, at least from a modding perspective.  Were they trying to tame the high end Chinese capsule sizzle? Watch; New Listing MXL V63M Condenser Cable Professional Microphone. I have a personal stash of about 30 pristine NOS 5963's, many of them 1950's blackplates, and I only spent an average of $7-$20 each !  Right?Â, I checked and rechecked. Its more important than a tube swap, more important than a capsule swap. I opted for a silver mica at 39pf.Â, For C19 - this is a big cap so will definitely need to be electrolytic. Both will deliver significantly better performance than the V69ME ever will, with significantly less work.  The J309 will operate up to 25V Vds with the spec sheet listing 10V as average operating voltage.  I spent a bit of time troubleshooting when I was done.Â. The MXL V69 seems to be a very popular mic among low end enthusiasts.  I can't really do anything (that I know of, or that would be easy)  about the surface mount resistors on the special blue colored board that completes the FET & transistor circuits.
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