> "Steve McDonald" <bigrocketman3@webtv.net> wrote in message

> news:12940-3F639FF2-103@storefull-2114.public.lawson.webtv.net...

>

> > To elaborate on what has already been said, you can run two

> > external mikes into the single, 1/8-inch, stereo minijack (3-pin) of the

> > TRV900's mike input, by using an adapter plug. This has two 1/8-inch

> > mono (2-pin) minijacks on the back and one stereo miniplug on the front.

> > It should be a shielded adapter, to minimize outside interference

> > entering the audio tracks. You can find such adapter plugs

> > at Radio Shack, but you might have to go to a pro

> > electronics supply house to find a shielded one of this type.

"Kenneth Robbins" <krobbin9@worldnet.att.net> wrote in message

news:cv89b.139330$0v4.10241613@bgtnsc04-news.ops.worldnet.att.net...

>

> This is a variation on the original question, but thought I'd ask here

> because you all seem familiar with TRV900. I have a NADY 151 VR Wireless

> microphone system, but have never used it on my TRV900, but have a family

> wedding coming up and would like to. The camera's operating manual

> describes a "MIC jack (PLUG IN POWER), which is located on the front face of

> the camera body. Will that accept a simple connection from the wireless

> receiver. And should I be able to hear the sound as it is coming into the

> camera through headphones connected to the camera? I.e., does it "loop"

> through in order to know that you're actually recording sound as the camera

> is running. Long question, but hope someone can advise. The notion of

> (PLUG IN POWER) actually confuses me and am not sure what that means vs. a

> non powered wire connector. Thanks.

The camera "emits" a DC voltage which some inexpensive

electret mics can use for needed power instead of a battery.

It is similar in idea to "phantom" power, but the voltage is much

lower than expensive phantom-powered mics need to operate

properly. Generally, mics that have a built-in battery will not

use the DC voltage coming from the camera, and some may

need to be externally isolated from it to prevent "crackling" noises

when the connecting mic wire is moved. The Mini-DV mic input

jack is generally 1/8th inch stereo (three conductors on one

pin - for left, right, and common ground). As "SMcD" pointed

out, Radio shack sells a dual mono to stereo adapter (though it

*is* sufficiently shielded for most purposes) when you want to use

two mics (you may need to add a compact right-angle 1/8th"

stereo adapter to best-fit the TRV900 jack, since it is close to

an interferring surface on the camera [it also keeps the wire

routing neater...]). Without using a mic mixer, the levels may

be mismatched between two different mics (which may upset

the AGC a bit), but levels (and EQs) can be adjusted during

editing. Plugging in a mono mic will cause the camera to place

the signal on both channels, giving you "dual mono" sound.

All inputs should be audible on the headphone connection,

though on at least some Sony camcorders, the sound will be

brighter and noisier on the headphone output than from the

line outs (or on the tape).

--

David Ruether

d_ruether@hotmail.com

http://www.David-Ruether-Photography.com