I have a clip-on condenser microphone, the Shure PGA98H-XLR, which I use for my trombone. It ends in an XLR adapter which clips onto my belt, and I can plug an XLR cable into that.
For about 90% of my gigs a wired microphone is fine, but occasionally it would be much better if I could go wireless.
From what I can see, the best way to do this would be something like a Sennheiser G2 system using a plug-on transmitter, although since I'll need phantom power this would have to be one of the high end ones such as the SKP 500 G2; even a used one on eBay is about £200, then I'd need a receiver which would take the total to ~£250.
I'm wondering if it can be done any cheaper than this, since I won't need it all that frequently? Perhaps using something like a small battery-operated phantom power unit (e.g. Millenium PP2B) and then a standard (non-phantom-powering) G2 beltpack trasnmitter, for a total of about £120?
The linked power unit is still rather bulky though (it has two in/outputs, I'd only need one) and has no belt clip so not ideal. Does anyone have any better suggestions, or thoughts about the two setups I suggested?