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Matthew Steel

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    Live sound and recording for higher education

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  1. Matthew Steel

    What to do with 600-698 MHz wireless systems?

    I feel your pain because we have tens of thousands of dollars in 600MHz systems that will be illegal in a couple of years too. Some we have been able to get re-blocked, but even though that was less expensive than buying new, it still was a significant cost. Those Sony transmitters look like they have a 30mW power output setting and a 5mW power setting. After July 13, 2020 the legal power limit for operating in the duplex gap and guard band will be 20mW. It is doubtful whether 5mW would be useful and the 30mW setting would be illegal - but if there is no resale value to speak of, it may be worth hanging onto them and seeing how they do.
  2. Matthew Steel

    Dual Tumbleweeds

    If nothing else I expect a flurry of transmitter re-certifications - like, this month - or there will be problems with having things to sell. That is, unless there is something about the new rules I don't understand - or someone has set up a shell grantee code to thwart my searches on "dbz"
  3. Matthew Steel

    Studio Sound Magazine Sept 1984 Issue

    MCI JH-24. We still have ours here. My time here began during its last days of regular use but we still need it to play stuff from the archives from time to time. Just last week I used it to transfer a 16 track orchestral film score.
  4. Matthew Steel

    The horse has left that barn

    Yes, that is the case I have been making for the last few years. It's just that everybody else is making their cases too... Yes, that is true.
  5. Matthew Steel

    The horse has left that barn

    Nice for you. I can't answer you about anybody else, but in my situation there is no way I am going to sell our 22 channels 600MHz gear (that are still functional, legal, and that I need to do my job) until I have funding approved to replace them. Because I cannot unilaterally decide where my organization spends its limited resources, all I can do to get funding is to make my best case for the capital expenditure and send my request up the chain of command.
  6. Matthew Steel

    New wireless TX deviation rules October '18

    It sounds like, from what Gordon said above ("new type acceptance numbers") they will at least have a new FCC ID, which would appear on the label.
  7. Matthew Steel

    New wireless TX deviation rules October '18

    Thanks Gordon on the info. It had not made the connection until reading this thread that the ETSI mask impacted deviation. But it makes perfect sense once I think about it. One question - as I understand it, it is currently possible to operate any Venue receiver module at either 75kHz or 50kHz deviation - but currently all receivers in a given rack use the same setting based on whether the rack has North American or European firmware. Do you expect that in the future we will be able to mix and match 50kHz and 75kHz digital hybrid modes on a single rack? It looks like we will be in a position where we will be using our existing 75kHz transmitters as well as 50kHz transmitters purchased in the future. Being able to mix and match would help us a lot.
  8. Matthew Steel

    New sub forum WIRELESS for Equipment?

    Interesting that there is no mention (at least that I could find) of the digital hybrid system in there - except for the picture on the front page.
  9. Matthew Steel

    Microdot to Lectro TA5 failure

    Agreed on the hardwired TA5F if you don't need microdot compatibility elsewhere. We had several 4060's where the microdot end of the cable failed and I repaired them by wiring direct to TA5F. Interestingly, the DAD6012 adapters we used to use were sold specifically for use with the (now ancient) M185 VHF transmitter. Those (and more recent ones like the DAD6021) connect the shell to pin 1, which on the VHF transmitters shorts out the VHF antenna. Rewiring direct allows one to change this if desired - although while we still use our VHF transmitters on occasion I highly doubt even we would use a 4060 with them any more.
  10. The university where I work does live streams of 2 chapel services per week, plus athletic events and other special fine arts events occasionally. If I am involved it is usually in an auditorium setting and I am also running sound reinforcement and an audio record mix anyway. So in those cases I just send the record mix to the webcast people from the video department. We use analog lines since they are nearly universal. As we are in an installed situation we don't have lots of temporary lines and noise hasn't been a problem. Never would think of WiFi for an audio feed. Occasionally if it is a multiple night live fine arts event (e.g. dramatic production with 7 live performances) the camera crew has come to rehearsals to get shots they couldn't get with the audience present, then other shots at an early performance. They then can have a day or two to edit things together and then stream the edited version "live" during a later performance. Shh. Don't tell anyone.
  11. Matthew Steel

    Lectro LMb v2.13 changes affect mics with nonstandard wiring?

    Are you telling me that ceramic clad 5W wirewound resistors won't work? Just kidding - Yes, I got 1/8 watt metal film 1% as recommended in this other thread. I would not have thought about metal vs carbon otherwise. It still amazes me that when I was learning the resistor color code the only options for the tolerance band were gold and silver - and now 1% resistors are only two cents each.
  12. Matthew Steel

    Lectro LMb v2.13 changes affect mics with nonstandard wiring?

    Yes, when I discovered that rewiring the mics would fix it I decided to bite the bullet and rewire the mics to present day recommendations. We still need compatibility so I'll do the "compatible" wiring and I already got some resistors for that purpose. I do the wiring myself so I can do a few at a time as I am able.
  13. I wanted to share our experiences with newer LMb transmitters in case somebody else runs into the same issue. Newer LMb transmitters (those with firmware 2.13) appear to be more picky about microphone wiring than earlier versions of the LMB (2.10 and 2.11) or other Lectrosonics transmitters we have tried. As we have been transitioning out of 600MHz we have chosen to standardize on the LMb, mostly for cost reasons, and because its features meet our needs. We have had lots of trouble with the transmitters we bought new, which had v2.13 firmware on them. The problems appeared to be related to low audio level which required high transmitter gain settings and resulted in high noise as well as poor immunity to RF sources like cell phones. However we had bought a couple of older used transmitters and these did not exhibit the same problems. It seemed unlikely that eight transmitters bought in two batches would all be broken, so I made a call to New Mexico. I found that there was a circuit board revision that came out with v2.13, but changes were not expected to affect the audio input portion of the transmitters. Now, note that we have been using Lectrosonics transmitters for decades and when we first began using M185 VHF transmitters we followed the microphone wiring recommendations at that time for our MKE-2 microphones: pin 1: Shield. pin 2: Bias (red). pin 3: Audio (blue). pin 4: Jump to pin 1. pin 5: Not connected. shell: Not connected to shield. Through the years we bought different Lectro transmitters but we never fully retired the old ones - so we needed all our microphones to be compatible with all transmitters. Each time we bought a new transmitter we checked out the microphones with it and the wiring we were using seemed to work fine. This was the case with the transition to servo bias wiring even though new "universal" wiring recommendations were published along with the input change. Our existing wiring appeared to perform equally well with M185, UM200c, UM400a, SMa, and (older) LMb transmitters so we stuck with it. The solution turns out to be simple (but relatively painful) because the currently recommended "universal" wiring (Figure 5) does indeed perform satisfactorily with all the transmitter models we own, and so all that is required is to rewire all our MKE-2 mics to the newer wiring. The painful part is that we have about 50 microphones that need to be rewired. I would find it interesting if any of the Lectro insiders here would have any comments. Specifically, knowing the way our mics were wired, would the new PCB or firmware be expected to make this kind of difference or is this totally unexpected? Also, would a Lectro M150 be expected to behave the same way as the MKE-2's? Should I rewire ours into M-152's if I want to use them with servo bias transmitters?
  14. Matthew Steel

    Lectrosonics UCR211 problem!

    Now, now, those can't qualify as "very old." (steps away to check something) Why, the user manual is dated 2004 - only 14 years ago. That's hardly "old" for Lectrosonics gear, let alone "very old" Now, I'll grant you that our R185's are "very old" - but we still use them when we have to.
  15. Matthew Steel

    Lectro Block Frequencies in CSV or Excel?

    OK, I looked through my stuff and found this file I did sometime. Only 100kHz tuning steps, but that's when you really want the hex codes and stuff anyway. No guarantees that it is totally accurate. LectrosonicsFrequencies.xls