Recent content by Stevens R. Miller

  1. Stevens R. Miller

    Dimmable PAR38 250 Watt replacement?

    Is that more common with the instruments using seven (or some other low number of) LEDs, Jay? Inside a couple of feet, with mine, you can see the colors separate, but anything over a yard and they blend pretty well. The Coidaks (or whatever they are called now) have 54 LEDs in them (12 red, 18...
  2. Stevens R. Miller

    Dimmable PAR38 250 Watt replacement?

    The professionals here are going to flay me for this, but I have had great success with some knock-off Chinese products. In particular, I bought a bunch of Coidak CO804 pars a while back, at about US$50 each. They produce about as much light as a 350W incandescent does, are real RGBW, pull tiny...
  3. Stevens R. Miller

    What is This Thing?

    Looks like you fellows have cracked the code for me yet again. With a bit of Googling, I find that the two devices nearest the center of the lower left of my four images are, indeed, both Sennheiser IR hearing assistance radiators. Here's that bit blown up, with two images I just pulled off the...
  4. Stevens R. Miller

    What is This Thing?

    Went to the Kennedy Center for a concert last night. We had great box seats on the first tier, as close to the stage as we could get. There was a lot of DMX cabling running on the edge of the tier above us, but also three odd boxes, about one-foot square and maybe four inches thick, that had no...
  5. Stevens R. Miller

    Build this rack today

    How does that avoid IMD issues, Bill?
  6. Stevens R. Miller

    How to use an earset retaining band?

    Thanks! Got links to any good pics of how a properly adjusted earset looks? It sure is a bigger challenge than I had expected, to get these things to stay on without tape (which everyone hates).
  7. Stevens R. Miller

    How are wireless microphone "bands" defined?

    The matching transformers on that design look a bit finicky to me. I was thinking of starting with a two-element quad. No transformer needed and (some say) a bit more gain than a two-element Yagi. Easy to make, too. Treoghalvfjerds, gammel mand!
  8. Stevens R. Miller

    How to use an earset retaining band?

    Thanks! You are correct that it varies. Apparently, I do have the "perfect" ear for it. Alas, I don't act. My son (who acts) tried it for me and we just could not get it to stay on his ear by itself. But, tape is always an option and I may do better with practice. Cheers!
  9. Stevens R. Miller

    How are wireless microphone "bands" defined?

    All true, but these are the kinds of issues I am willing to deal with, particularly when 90% of all problems I have ever had with any wireless microphones I have used have been at the mike-to-pack connector. (Another 5% have been at the element, and the last 5% are solved by judicious frequency...
  10. Stevens R. Miller

    How are wireless microphone "bands" defined?

    IMD is a function of frequency choices. The Samsons have tables for groups of eight that look comparable to the tables you find in other brands' manuals, and math is math, no matter how much you spend. RF overload from a few 10mW transmitters doesn't worry me much. RF sensitivity is actually...
  11. Stevens R. Miller

    How are wireless microphone "bands" defined?

    I've been testing our first two Samsons on my bench. So far, they are superb. Packs are not as sturdy as more expensive stuff, but they are smaller and lighter. Audio quality is more than adequate for our needs. I also like the continuously variable attenuator. One of my colleagues groused that...
  12. Stevens R. Miller

    How to use an earset retaining band?

    My experiments so far suggest it goes behind your ear. Man, when you do that, that earset stays on. the base of the stem (the most acutely bent part of the whole thing) sits tightly at the entry of your ear canal, and I cannot shake my head hard enough to make the earset change position, much...
  13. Stevens R. Miller

    How to use an earset retaining band?

    Our Samson Concert 99 wireless microphone systems arrived. First impression is very good. The included earset has a thick rubber bit spanning the hook that goes around your ear. In Samson's advertisements, this is called a "retaining band," and is allegedly capable of keeping the earset in...
  14. Stevens R. Miller

    How are wireless microphone "bands" defined?

    I suppose the question is really, "How bad's the mismatch at the ends of a 24 MHz range?" The manufacturers make some pretty eye-popping claims about the commercial antennas they sell. They might even be true, and I've read some interesting stuff about helical antennas that had varying pitch in...
  15. Stevens R. Miller

    How are wireless microphone "bands" defined?

    The rigs we've bought operate over a 24 MHz chunk near 550 MHz. We're not going to have to cope with anything like much of an octave. Regardless, fine-tuning antennas for this application is probably pointless in any case. I say that because, when you are outdoors on a flat plane with your...