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About LarryF

  • Rank
    Hero Member
  • Birthday 12/11/1943

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Profile Information

  • Location
    Rio Rancho, New Mexico
  • Interests
    Classical music, fast cars and Maine Coon cats
  • Interested in Sound for Picture
  • About
    I have been chief janitor at Lectrosonics for 40+ years.

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  1. 1-800-821-1121 An Unartificial Intelligence Human will answer the phone and get you quickly to someone that can track down your serial number and block. Best, Larry F
  2. Lectrosonics SMWB coming soon?

    As I understand it, it is another A/D conversion. LEF
  3. Lectrosonics SMWB coming soon?

    Matt Mayer beat me. That tumbleweed is on the shelf and has been shipping for a little while. Search under AES on the Lectro site. Took me a little while to find it. It's under SRaES which looks like an ES accessory for an SRa. Thanks Matt, LEF
  4. Looking Into Buying Zaxcom IFB

    Thanks for the update on frequency hopping in the 2.4 GHz band. I certainly don't understand why the FCC allows frequency hopping in the entire 100 MHz band (2.4 to 2.5 GHz). That makes audio use very difficult. Best Regards, Larry Fisher
  5. Looking Into Buying Zaxcom IFB

    Glenn, you are absolutely correct. My apologies. The Quadra was in the 902 to 928 MHz band and not in the 2.4 GHz band you are using. They are totally different bands. Any place where I said 2.4 GHz should have been 902 to 928 MHz. The 2.4 GHz band does have many applications such as industrial heaters, microwave ovens, Bluetooth and other ISM applications. The most common application being WiFi modems and routers. The 2.4 GHz is channelized so changing channels should move away from a specific interferer. The 2.4 GHz is also restricted on power so interferers would have to be local. I will delete my post. I'm afraid the only thing it will leave is the Isetta. Best Regards, Larry Fisher
  6. Looking Into Buying Zaxcom IFB

    I I think this is why some people buy antique cars or collectible radios; they don't have to worry that the next new release obsoletes their latest whiz-bang. If you are happily polishing the chrome of your BMW Iseta 300, the fact that the new 2018 Porsche 911 has 20 more horsepower than the 2017 model, doesn't phase you in the least. Best, Larry F
  7. Lectrosonics SMWB coming soon?

    Modern LED's pull about 1 to 2 mA for normal brightness. You can run more, but then they hurt your eyes. The back lights for LCD's only pull 3 to 5 mA's. All this to say, turning off the LED's makes very little battery life difference. We only allow them to be turned off to keep them from being seen through clothing. The first LED's we used on the 30 MHz receivers, back when batteries were made of copper nuggets and dinosaur dung, pulled 25 to 30 mA's. That was too much current to use on a transmitter running from a 9 Volt battery. We thought we had died and gone to heaven when Hewlitt Packard started making LED's that were reasonably bright at 5 mA. Best Regards, Larry Fisher
  8. Lectrosonics SMWB coming soon?

    Remember, the battery voltage measuring circuit is not dependable on NiMh rechargeable batteries. Complete run down will be a solid test. Best Regards, Larry Fisher
  9. Mark fourm as Read

    I'd somewhat prefer the single click. If you accidentally hit it, you still aren't deleting anything. Best Regards, Larry Fisher Still a double action here as of this morning. LEF
  10. Lectrosonics SMWB coming soon?

    I tend to agree that you ought to at least get some early adopter swag. For instance, a 20 lb bag of premium guinea pig food sounds appropriate. In Jest, Larry F
  11. Lectrosonics SMWB coming soon?

    From Wes, the production manager: Hi Larry, The first production serial number for SMWB is 101. Wes
  12. Lectrosonics SMWB coming soon?

    I'll ask.
  13. Lectrosonics SMWB coming soon?

    That is our fearless leader Gordon, that is not photoshopped and there are more coming from New Mexico. Best, Larry Fisher
  14. DPA 4098 - first impressions

    The resistor is in series with 4 Volt servo input so larger values reduce the DPA current. The Lectro servo input is current driven. Less current, less "gain". Keep in mind, increased gain at the mic element may gain up the noise just as much as the desired audio. My guess is that increasing the gain won't improve the signal to noise ratio, which is the only important number. The transmitter has enough gain range to make high or low resistor values work. The clipping levels, distortion numbers, limiter range and transmitter input noise are all independent of that resistor value. It may be comforting to see a middle value on the transmitter gain setting but it makes no real difference. As long as you don't run out of range. Best, Larry Fisher
  15. DPA 4098 - first impressions

    Yeah, that one is mine. The DPA's we measured drew whatever current necessary to have 1.8 Volts across the mic. They would draw as low as 20uA to as much 3000uA(!) to stabilize around that voltage depending on the value of the bias resistor. Since we provide 4 Volts and that is twice the idle voltage, there is no "headroom" problem or "high noise" due to low voltage. Their head engineers understand this. Some of their techs don't understand the servo circuit and are just looking at raw specs. As an aside, you can vary the "gain" of the DPA mics by choosing the bias resistor in the connector; smaller values give more gain (1k) and larger values (4k) give 12 dB less. 2k is a good middling value. Best, Larry F