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Lamplighter

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    Amateur theatre practitioner
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    Retired, busier than ever!
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    Brian

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    South Gloucestershire

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  1. Hi Chris You don't need to worry unduly about matching to the 100 v line to identify your circuits. A 100 to 200 w amplifier at 8 ohms will easily give you enough level without a matching transformer. If it is easier then a 10 w amp with a speaker transformer in reverse will suffice. I would tend to use pink noise as it is easier to locate a speaker where there might be more than one in earshot. Music works well but you always get a quiet bit at the wrong time. Brian
  2. Does anyone have a Trantec S5.5 receiver service manual ? Thanks Brian
  3. I would rewire with the two pots joined in series, that would give 0 to 100% attenuation
  4. The Sennheiser quick guide to XSW2 shows a minimum of 5 metres between Transmitter and Receiver. The other consideration is to run an intermodulation check across all channels in use.
  5. A short term solution would be to cover the boom and capsule with heatshrink. RS do a darkish brown. The other solution which has been mentioned previously is to paint the boom and mic.
  6. Lamplighter

    X32 Problem

    Hi Steve That sounds as if the memory battery needs replacing. Brian
  7. Update Eventually found this after a bit of searching. https://www.sennheiser-sites.com/responsive-manuals/XSW_IEM/EN/index.html#page/XSW_IEM/XSW_IEM_02_Instructions_EN.3.13.html Simple when you know what is there.
  8. Lamplighter

    Clip Removal

    Has anyone worked out how to remove the belt clip from Sennheiser XSW 2 belt-pack? First appearances suggest that the pack may need dismantling to release it. I always use them in a pouch so the clip is redundant. Brian
  9. The later Yamaha models use "back" or " previous" to return to the previous scene. I'm not sure if that works for AH.
  10. My 2018 - 2019 paper catalogue is still current, though quite a few items have disappeared or been replaced. It still makes a good starting point when looking for most things. Brian
  11. Richard You can choose any 3 from 173.8, 174.1, 174.5 and 174.8 and add 175.0 for intermod free operation. External noise is a separate problem which is not so easily overcome. I haven't looked at the new frequencies as my S3500 kit hasn't got them loaded. A quick look says that they are a disaster waiting to happen with 200KHz spacing all the way. The old 5 channels give 300, 400, 300, 200 KHz spacings so you only require to loose 1 channel from the first 4 to be intermod free. All 5 of the old channels are intermod free of 3rd and 5th order products but only for 2 transmitters in close proximity The 4 channel scenario works for 3 transmitters, and is generally considered best practice. Brian
  12. CPC MF12 range £1.32 for a pack of 50 resistors. 10k = RE04068 2k2 = RE04074
  13. And now we are on the same wavelength (pun intended)
  14. Ray We are referring to the circulator in the transmitter aerial path, this reduces the level of other transmitted signals getting into the output stage and mixing with that transmitter frequency. The reduction in spurious output is pretty dramatic, it can be as much as 60 dB if well engineered. The first 30 dB is directly due to the isolation given by the circulator the rest by the reduction of mixing products. As previously mentioned the main source of intermod problems in radiomic systems is interaction between the transmitters.
  15. That makes sense, fitting circulators in the transmitters will drastically reduce the intermods between them, the major source of the problem. It is interesting that they have developed them to be small enough to do this.
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