Electro-Voice RE20 Question

Discussion in 'Microphones, Speakers & Audio Processing' started by W1GNL, Nov 6, 2021.

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  1. W1GNL

    W1GNL Ham Member QRZ Page

    Can I just plug this in to my Yaesu FTdx-101MP with the Heil XLR to Yaesu cable, without needing to first go through some sort of external cloud lifter or pre-amp? I've had a couple of these mics sitting around for awhile and thought I'd go ahead and install one for my HF setup. I also have a Shure SM7B I could use as well, but prefer the articulation for voice of the RE20 over the SM7B.

    Alternatively I'd considered using the dbx 286s as a go between, but would rather put as little in my audio chain as possible. And I don't really want to make room for the dbx 286s.

    Thanks for your time!
     
  2. KA0HCP

    KA0HCP XML Subscriber QRZ Page

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  3. KA0HCP

    KA0HCP XML Subscriber QRZ Page

  4. K4EM

    K4EM XML Subscriber QRZ Page

    Instead of a Cloudlifter I use a Klark Teknik CT-1, much less expensive and works great. I use it to boost my dynamic mic to use with a IC-7300. Only Con is, it needs phantom power to power it, luckily I had a $18 phantom P/S already, Nady brand.
    I think the RE-20 should work, output is 1.5mv. That is probably mid-range power for a dynamic mic so the Yaesu mic preamp should handle that.
    Dave
     
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  5. WA3VJB

    WA3VJB Ham Member QRZ Page

    Excellent microphone. Make sure you DO not activate any phantom power to it. Not needed. Once you get it matched with your transceiver, have a look at a scope, preferably on AM, and make sure the phase of the mic is correct. You probably know that Pin 2 of the XLR is "hot," such that positive pressure on the mic diaphragm = positive leading sine wave. That should be the case throughout the chain. If not, swap the balanced pair anywhere and have another look.
     
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  6. W1GNL

    W1GNL Ham Member QRZ Page

    Thanks for the invite, and yeah the EV RE20 is a fantastic microphone. I knew about the XLR cabling, and as far as matching goes, the RE20 is 150ohms and from what I can see all the Yaesu microphones are 300 ohms, so the RE20 is going to be louder. I'm going to see if I can adjust the volume in the radio since it comes with a microphone processor/compressor and EQ. If not I'll look at a matching transformer to step it up to 300 ohms.

     
  7. WA3VJB

    WA3VJB Ham Member QRZ Page

    Louder? Not sure you can use impedance to compare the likely loudness of the EV vs. a Yaesu microphone. I presume the setting of your mic gain control would depend on the voltage output of the microphone into its matched load impedance. You could have two 150 ohm mics, for example, into a 150 ohm mic input of a mixing console, and the amount of gain the console applies could be different to reach the desired level.

    A higher output level is one of the advantages of the Electro-Voice RE-27N/D compared with the older RE-20. The impedance is the same, but your audio chain can sound better because of less initial amplification needed.

    Using really good microphones in the hobby is a satisfying aspect that more and more people are discovering. The pleasure comes not only from addressing a substantial, nice looking, "broadcast" quality microphone, but also the technical pursuit of making such a microphone work well into a hobbyist-type radio. Have fun, that's the goal, right?
     
  8. KA1BWO

    KA1BWO Ham Member QRZ Page

    If your goal is having fun using studio mics and audio chain to adjust processing, levels and frequency response. This is just another aspect of the hobby. The realization is that you won't get the full capability of broadcast quality equipment due to the fact that most modern transceivers transmitter audio bandpass is restricted by the software.
     
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  9. W1GNL

    W1GNL Ham Member QRZ Page

    Yeah the audio on this rigs is pretty limited compared to the microphone itself. Rigs like the Icom 7610 hard limit you (as far as I know) to 2.7Khz and even eSSB capable rigs like Kenwood TS-890s or the Yaesu FTdx-101 series your pretty much limited to a maximum of 3.4KHz-4KHz so I'm not expecting miracles. This is mostly for fun and I already owned the microphones and thought I'd add one to the shack just to complete the look on this end.

     
  10. WA3VJB

    WA3VJB Ham Member QRZ Page

    "The look" is a significant part of the operating experience!
    I smile when people question the use of professional-grade components in our "amateur" setting, after all, it's up to the user to decide where the enjoyment comes from.
    Hope to hear you on some time. I traded an RE-20 toward the RE-27 when it first came out. Electro-Voice, through its retailers like broadcast equipment suppliers, offered to take an RE-20 and $100 for a brand new RE-27. The marketing promotion was to help get the new model out there. I was quite happy with the change. Their offer was enough to motivate me to try it, otherwise, the '20 was/is also a fine microphone for vocals.
     
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