TURNER +2/+3 MIKES ON MODERN ICOM HF RIGS - QUESTION

re: "Putting 48V phantom power on an HF radio's mic input would cause Bad Things(TM). "

Holey Toledo!!

What are you doing with those kinds of voltages on a ham rig in conjunction with a Turner+3 mic?

Edit: Okay - I read further down!

 

Even though the condenser bias ("phantom voltage") from ham rigs is usually in the 5v-8v range and certainly not 48v, I'd think the +2 preamp is already capacitor coupled.

I didn't find the schematic quickly (it's probably out there, I didn't look very hard) but the +2 has a preamp in its base and I'd expect the output of the preamp is already AC coupled, so it wouldn't matter if DC bias were provided by the rig or not.

Is that not the case?

 

I get great reports with my Turner SSK mics on my IC7300 and 718. Actually I had a few folks that liked the SSK over my ICom SM50 desk mic. I rotate them and a d104, just love the vintage look.

 

Yep, I read it backwards initially. It happens

 

I have found that "good audio" is in the ear of the sender. I have known hams who would not take anything but broadcast audio, those that think "hand mics are best", and still an alarming amount that think raspy, heavily amplified audio is best. I suggest you do what you want as long as your bandwidth is less than 2.8khz and you don't splatter then "don't worry, be happy".

 

I'm working on a similar project.
Found on the Internet:



I'm not an expert, but it looks to me like it would be fine without an additional capacitor.