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PhillySound37

New Lavs for old VHF Lectro (M187)?

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Can the fine folks here recommend some good lav options, apart from the Countryman B3, that I can easily purchase that are pre-wired to work with the old VHF Lectro M187 transmitter? 

In an ideal world, I'd get a Lav that would both work with the M187 and could either also work with newer Lectro / TA5 connection transmitters or be easily adapted to do so. But I realize this might not be possible because of differences in wiring (I'm a newbie to production sound)!

Here's a little context for my question: 

I recently acquired several old Lectrosonics VHF wireless receivers and trasmitters (CR187 Rx, M187 Tx), and they're in really good shape. The units came with old M-150 lavs, which don't sound so great to my ear. So I started looking for options to give them new life. 

Being realtively new to production sound, I thought "oh, I'll just get a Sanken Cos-11D with a TA5F connector." I also thought this would be a good investment because as I upgrade to newer lectro units, I could retain the Sankens -- I'm thinking of getting a couple of lectro PDR units.

Of course, when I plugged it into the M187, I hardly got any signal at all. I think this is a wiring issue, but I don't have the skill or the resources to go in and rewire the Sanken (not yet any way). 

As I began my search for a good lav to work with these systems that is still available and is already wired for the M187, I found the Countryman B3 (Adorama has them in stock and they are already pre-wired for the M187). 

But is the B3 as good as I'll get for the M187 without having to rewire a lav? I might be willing to try to rewire the 11D, but then I'd likely loose the forward compatibility of the 11d with newer lectro systems, yes? Thanks in advance for any input.

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A rambling but still incomplete answer:

Modern Lectrosonics transmitters have a different front end than your VHF transmitters. This modern front end supports both "servo" and "universal" wiring. Any lav wired  "servo" is not going to work with your VHF units. But compatible wiring may be possible. Some information about that here: http://www.lectrosonics.com/Support/component/com_fsf/catid,2/faqid,95/view,faq/

Here is the VHF wiring input:IMG_0547.GIF

 

And the UHF wiring input: 

IMG_0548.JPG

 

You'll notice that figure 2 on both diagrams is the same. Most mics are wired that way, notable exceptions being the Sanken COS11d and DPA mics. So I would think that Countryman, Tram, and Lectrosonics lavs will work with both your VHF and more modern transmitters.

The shield termination is different for VHF, as noted at top of this page: http://www.lectrosonics.com/Support/Microphone-Wiring/vhf-transmitter-5-pin-input-jack-wiring.html

Finally, the Sanken COS11d is notoriously hard to rewire due to some insulative material on its wires. I prefer to let the pros handle that one (and I fix guitar amps for fun).

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I wire all lavs for Lectro using the TA5 connector as per figure 2 in the chart above. They all work just fine wired that way including the old Lectro VHF 185 series units.

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19 minutes ago, Nathaniel Robinson said:

You'll notice that figure 2 on both diagrams is the same. Most mics are wired that way, notable exceptions being the Sanken COS11d and DPA mics. So I would think that Countryman, Tram, and Lectrosonics lavs will work with both your VHF and more modern transmitters.

Finally, the Sanken COS11d is notoriously hard to rewire due to some insulative material on its wires. I prefer to let the pros handle that one (and I fix guitar amps for fun).

Thanks for the info! I'm still trying to digest it, but... would one of these Sanken 11-Ds linked below with "universal wiring" work for both my current VHF transmitters and the newer Lectro UHF ones?

https://www.adorama.com/sa11wnbkunle.html

http://www.locationsound.com/sanken-cos-11d-modified-with-2-wire-universal-wiring-2516

I know that the mic (cable?) functions as the antenna while in use with the VHF.

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Great. Thanks, and one more stupid question: would such mics also work with Lectro PDR? The manual says:

"The input connection and wiring is compatible with microphones pre-wired for “compatible” and “servo bias” configurations to feed 5-pin inputs on Lectrosonics wireless microphone transmitters."

I'm assuming "compatible" here means the same thing as "universal"? 

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The TA 5 on the PDR takes the same wiring setup as the wireless transmitters. BTW, there are no stupid questions only stupid answers.

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LarryF   
1 hour ago, PhillySound37 said:

[snip]
I'm assuming "compatible" here means the same thing as "universal"? 

Yep,
LEF

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