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DrDranim

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Everything posted by DrDranim

  1. Extremely insightful. Thank you again, Larry. Interestingly, Sennheiser's stock whip length for their A band (516-588MHz) is exactly the same length as they manufacture for their A1 band (470-516MHz). Guess they really stand by the length not mattering as soon as you put the pack on a "warm bag of saltwater" 😆. I ended up cutting my A band to stock length (~125mm) and A1 band to ~136mm. I also discovered that on the G3 Tx units, the whip is electrically connected to the body/chasis. There's no isolation like there is with the Rx units. So 🤷‍♂️, just strange. Everything is working post-mod, though. Success?
  2. Thank you, Larry. A follow-up Q: The stock length of the Senn A-band (516-588MHz) whip, as measured from the body pack to the end of the steel wire is ~125mm. From the limited amount of reading I've done on 1/4-wave whip length, using the equation 300/CenterFreq/4 results that the 1/4-wave length of the A-band's center frequency (537MHz) should be ~139.5mm. I referenced Lectrosonic's whip cutting guide and they recommend a whip length of ~120.4mm for Block 21 (center freq 550.35MHz). However, using the (300/CenterFreq/4) equation, the resulting 1/4-wave length is ~136.27mm. Any idea why the given/recommended whip lengths are shorter than what that equation gives? (I'm sure it has something to do with theory beyond my tiny brain!) (And just because it's interesting, here's a pic of the Senn antenn stripped of insulation.)
  3. It seems every walkthrough of how to do this mod ends with "cut your antenna length according to the Lectro guide" or "cut to the guide which came with your antenna." These antennas are from AliExpress, which I've seen recommended here and in other SMA mod guides and they don't come with a cut guide. My antenna basics question being, since the Gx antennas have no external metal shielding (rubber coated only), does the metal of the pack effectively become the shield? Does that determine the "start point" of length of the antenna? I know there's a certain allowable tolerance for how exacting you need to be with the length of the whips for these kits, but I'm just one of those folks who'd like to be exact as I can. TIA!
  4. Just saw this on ebay… http://www.ebay.com/itm/Sennheiser-MKH60-MKH-60-P48-shotgun-mic-NICE-/130951659606?pt=US_Pro_Audio_Microphones&hash=item1e7d53c056
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