@mrgrooves666
here is the capsule...
here is the capsule...
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Thanks Admiral-dk for your explanations about capacitors + audio transformers...I would be very careful with C4 - electrolytes are in some situations a VERY Bad Idea when you connet them to an Audio Transformer
Reason - Some Audio Transformers react to a DC Current and form a Filter.
Example ; tc-electronic used a Very high quality Transformer in their old 19" Parametric EQ (Land-Line Version), that had a Bandwith 5-200KHz. when feed with a 10µF Filmcapacitor in series with a 600 Ohm Driver + loaded with 600 Ohms on the secondary and a Filmcapacitor between it and the next stage. It only took a few mA. of DC current through any of the two coils and you had a 1KHz. Bandpass filter with 80dB/Octave ...!
So a Tantalum Capacitor usually has between 0.1-1% of the Leakage Current of a good quality Electrolyte Capacitor => Far better suited as C4 ...!!!!
And before I get loads of flak - a Film Capacitor would be the absolute best as C4 - but I don't see enough space inside your microphone for that ....
One thing that can totally ruin the idea of using a Tantalum in a similar circuit - is if it hasn't got at least 33% of it's rated DC voltage across it - as this WILL make it distort the Audio (or any other AC voltage) ....
Per
MKS2 ? or another ref ?Wima makes some small 50 volt polypro film caps that work well in the audio path. I've used them up to 4.7 Mfd. I would stay away from 'lytics and tants. Try these first if they fit the case. Mouser or Digikey has them.
Good luck.
ok... and ? what do you think of its sound ?Warm Audio uses assembly houses in the PRC. The transformer in their KM-84 repro has been made by Cinemag and shipped to Beijing for a few years now. That transformer with 6mil lams is responsible for the major part of its sound. It’s in the Iron!
WOW - Griffon asks a whole lotta dough for mics built around Primo EM273 electrets!ok... and ? what do you think of its sound ?
I must say that I'm not a professional nor I'm working in a big studio : I do mobile recordings of classical + baroque + tradional -brittany - music in my region and I can't afford expensive gear
Before the WA-84 I used a sE8 cardio pair wich is not bad at all ! and a sE8 omni that I replaced lately by a Griffon GMS-120 pair (does anyone of you know this brand ? it's a young guy designing his own stuff alone and his mics can be found all aound studios in the world)
Besides I build my own pre (tube / AOP / bjt) and I'm beginning building my firts own mics with Soliloqueen's flat 47
Best Regards
Would be interesting to compare them with the Line Audio Omni1, which uses the same capsule (though heavily modified).Yes k brown... fortunatly I paid my pair less than 936€ ! they are maybe a bit expensive for what you get on paper but they sound nice
wow ! sooooo much mic brands around the world ! Ididn't know Line Audio and hope (lol) it doesn't sound as good as Griffon because of the price 150€ / each ! if so, I resell my Griffon tomorrow !Would be interesting to compare them with the Line Audio Omni1, which uses the same capsule (though heavily modified).
I think I'll soon buy an Omni1 from Line Audio to compare with the Griffon GMS-120 and then decide wich one I keep and resell the other one...Would be interesting to compare them with the Line Audio Omni1, which uses the same capsule (though heavily modified).
Your'e right MKS2B044701KOOKSSD - 4.7MFD/50v, Panasonic makes similar ones at 50 V- ECOV1H105JL -1MFD/50V - THAT P/N may be obsolete but it will find the current ones.MKS2 ? or another ref ?
can find MKS2 1uF (1uF tantalum is used in the signal path) rated at 50v and5mm height I guess...> no minimum height is 8,5mm for 5mm spacing
I'll see if it can fit...
Thank you
Hi RuudNL ! Let's not forget that that was done in the past (60's - 70's - even 80's) has been done with the component quality & disponibility of this period ! If Neumann created KM-84 today I bet it would be with a different choice of components...The original Neumann KM84 was introduced in the mid 60's.
Ans yes, they used tantalum capacitors!
Until now, most KM84 microphones still work without a problem...
(By the way: it will take a lot of effort to destroy a transformer winding with less than 1 mA, so even if the output capacitor gets shorted, there is not enough current to seriously harm the transformer.)
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