I have the Sennheiser Evolution G2 100 Series - UHF Wireless Lavalier, EK100G2 Receiver, SK100G2 BodyPack Transmitter (A 518-554 MHz). I need to buy another set of wireless lavalier transmitter and receiver for a second camera during a two camera shoot, and will probably go for the same outfit.

But I notice that these sets come with different frequencies in A (as above), then B (B 626-662MHz) and C (C 740-776MHz).

Can anyone tell me what's the difference between the A/B/C frequencies? I have the A frequency on my current set and I know that I can set four basic frequencies within this unit. So if I buy a second set to use for the second camera, is it OK to buy the A configuration or should I be buying the B or C etc?

Thanks.

Roger, if you read the fine print of your manual (p.79 in my printed version), you'll find that you have 9 channel banks with 4 frequencies each, but, the user bank freqs can be reset to other frequencies.

You have lots of frequencies.

This being the case, I think you'll do best with another trans/receive set in the "A" range, allowing you to mix and match as needed. For example, if you buy a plug-on or handheld transmitter in the future, it will work with either of your receivers.

This is on the assumption that you're not getting lots of interference in the "A" range with your existing set in your area.

Thanks very much - my A group frequencies seem to work (in Europe, Asia and the US) so I'll go with that!

Somewhere on Sennheiser's site is a chart showing the various uhf television station allocations by city -- so you can get a, b, or c to avoid your local frequency problems.

If you haven't run into any problems with your "a" freq unit, I'd definitely get another one -- it's really useful sometimes to put the same source into two different cameras or into both a camera and a recorder. And if you need two separate channels, there are lots to choose from.

Thanks very much for that info. I'm getting another "A" set - the one I've got now works great so I'll just get another one. I think it will all work out! Thanks again.