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564micgain [2007/03/29 15:58] n5na created |
564micgain [2007/05/21 00:43] |
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- | ====== Increase the VOX Response When Using a Heil Mic with an Omni VI+ ====== | ||
- | **From the Ten-Tec Reflector October 14, 1997** | ||
- | I talked with Ten-Tec Service, and they advised me to change R55 from a 330K to a 470K resistor, and R54 from a 47K to a 22K resistor. I won't be able to do this myself until after CQWW, so if someone gets a chance before the end of the month, please let me know how well it worked out. | ||
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- | Rick Andren (N9THC) | ||
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- | **From the Ten-Tec Reflector October 15, 1997** | ||
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- | I installed the mod reported by Rick, N9THC, in the mike preamp on my Omni VI. It was very similar to one I had already devised but I decided to install a more "official" change. The mod (change R55 from a 330k to a 470k and R54 from a 47k to a 22k) does increase the gain needed by the Heil cartridges. The approach I used was to just shunt R54 with a 39k and insert a 139k in series with R55. An | ||
- | additional mod I added was to shunt C50 (.1 ufd) with a 10ufd capacitor. My voice is quite low and, by doing this, the preamp accommodates my voice characteristics. | ||
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- | 73, Troy, W6HV |