wirelass lav inter-compatibility

[Chrisk]

I have a lav mic from a sure wireless system knocking about and wondered what are the odds of being able to use it on another wireless transmitter from another manufacturer (Audio Technica) if I change the connector. I can't seem to find the bias voltage of the transmitter but the sure states as 5v but works within a range of about 2.5 up to 10. Can't find impedence values either.

On another (very technical) note my wireless receiver (Audio Technica ATW-R100) gives out a mic level output but I would much prefer line level. I would of thought the internals would of been at line level maybe knocked down to mic. Can anyone confirm the internal goings on of a receiver and if they have even heard of people defeating an internal circuit that attenuates down to mic level to get a line level output? External pre-amps are quite expensive and the less likkle boxes in my bag and connections in my signal flow the better.

 

[Alcove Audio]

Okay, the manufacturer is "Shure", not sure.

Most lavs can be used interchangeably with most transmitters. As you have already noted you need to have the correct connector(s). I hope that you're good with a soldering iron.

A large percentage of wireless receivers are made to be connected to a mixer, and most of them have mic level inputs. You can use an impedance matching transformer to connect the output of a Low Z receiver to a High Z mixer/recorder input.

 

[Chrisk]

Thanks for the help with the lavs, but not sure if I follow you about the receiver hook up.
My problem is my 4 track recorder only has two mic inputs, the other two being line only. The radio's I had seen up until then where switchable between mic and line but the ATs I wound up with (e-bay bargain) were not. I'm fine most of the time but if I have a more complicated setup, boom and two lavs for example, I'm out of mic inputs.
The recorder is a Sound Devices 744T, the line inputs would be balanced +4 pro level@20k ohm. The transformer would match the impedance but I'm still around 35dBs short of input gain. I know the recorder has buckets full of gain but that must really be pushing it.
At the moment I'm working around it by passing mics into my DR-100 then using the line out, unbalanced unfortunately, into the recorder's line inputs. I assume I have a slight gain shortfall there 'cause I'm guessing the Tascam's unbalanced outputs would be -10 dB consumer level.
Might get that transformer anyway as that seems like the proper way of connecting my shotgun straight to my DSLR for a more compact set up for run and gun documentaries. Magic Lantern will afford me manual gain control and allow a balanced input.