ciscan.81
Active member
Hi Marik, Stewart, CJ, rodabod, PRR and Co.
I'm hoping one of you have a minute or two to answer a couple of questions for me.
Background:
I have followed the threads by the group DIY ribbon community for a while, having undertaken a 'from-scratch' royer-styled ribbon mic build last year. The mic turned out looking and sounding fantastic (think full gloss nickel plated royer 101). I used a Lundahl transformer, 2.5um foil and silver plated clamps (thanks for the advice on that Stewart). I didn't get around to posting some final pics etc, but will get around to it soon, as I am really proud of the build.
The point:
Anyway, I liked the mic so much (my first ribbon) I decided I wanted a pair for overhead duties...However, being a little time poor at the moment (too many build projects on!), I decided to just buy a pair of the ubiquitous Apex 205's to mod.
I have a couple of Cinemag 9887's (0.12 : 150 (1 : 35 ratio)) left over from the 'from-scratch' build, which I am hoping to use in these mics.
My questions are:
Would 2.5um or 1.8um foil be better suited to the above transformers in regard to impedance and ratios etc? (Given stated 50mm ribbon length x 3mm-ish width?)
I've never been exactly clear on this, but my rudimentary understanding is that thicker ribbon is lower impedance and so transformer ratio can be higher...? So a 2.5um could be better for the Cinemag 9887???? Yes, no?
Do you guys recommend removing the dampening from these mics as touted elsewhere? I gather the perforated plate is used to reduce boominess from proximity effect and increase HF ala 4038 (in BBC monograph)? Others claim gain in HF clarity at the expense of increased "boominess" upon removal...thoughts?
Any advice would be appreciated.
Kind regards
Wayne
I'm hoping one of you have a minute or two to answer a couple of questions for me.
Background:
I have followed the threads by the group DIY ribbon community for a while, having undertaken a 'from-scratch' royer-styled ribbon mic build last year. The mic turned out looking and sounding fantastic (think full gloss nickel plated royer 101). I used a Lundahl transformer, 2.5um foil and silver plated clamps (thanks for the advice on that Stewart). I didn't get around to posting some final pics etc, but will get around to it soon, as I am really proud of the build.
The point:
Anyway, I liked the mic so much (my first ribbon) I decided I wanted a pair for overhead duties...However, being a little time poor at the moment (too many build projects on!), I decided to just buy a pair of the ubiquitous Apex 205's to mod.
I have a couple of Cinemag 9887's (0.12 : 150 (1 : 35 ratio)) left over from the 'from-scratch' build, which I am hoping to use in these mics.
My questions are:
Would 2.5um or 1.8um foil be better suited to the above transformers in regard to impedance and ratios etc? (Given stated 50mm ribbon length x 3mm-ish width?)
I've never been exactly clear on this, but my rudimentary understanding is that thicker ribbon is lower impedance and so transformer ratio can be higher...? So a 2.5um could be better for the Cinemag 9887???? Yes, no?
Do you guys recommend removing the dampening from these mics as touted elsewhere? I gather the perforated plate is used to reduce boominess from proximity effect and increase HF ala 4038 (in BBC monograph)? Others claim gain in HF clarity at the expense of increased "boominess" upon removal...thoughts?
Any advice would be appreciated.
Kind regards
Wayne