a few quick comments to this interesting discussion -
With an Olympus LS10, a battery box offers no improvement over the
built-in PIP, when using Telinga clip-ons or their clones made with
Primo 172 capsules.
Mike Rooke says the Shure WL183 may have less noise than the Primo
172s when used with Sony M10 and D50 recorders. However this does
not work for an LS10 because of an LS10 quirk. The LS10 itself gives
lower noise when used at low sensitivity volume 10, and the 172
capsules are sufficiently sensitive that these settings can be used
for field recording. However when using the less sensitive WL183s,
settings of low 10 on the LS10 are not high enough, so one needs to
switch back to high sensitivity, which in itself adds more noise.
Using the WL183s with a different recorder e.g. a Sony one, may be a
different story altogether. I am only giving my experiences with LS10.
Has anyone tried using two WL183s per channel?
Another point, I did field tests on LS10 comparing twin capsules per
channel of Primo 172s, against single capsules per channel, and I
consistently got around 3 db better sensitivity with no extra noise.
I am not sure if the Sony D50 and M10 supply enough PIP to
satisfactorily run the EM172s and Telinga clip-ons. Might be worth
trying a battery box for this setup to compare?
note to Mike Rooke, you gave this link
but it does not work, using two different browsers.
On 23/10/2011, at 1:23 AM, Gene Dorcas wrote:
> The LS10 PIP holds up better than most handheld recorders under the
> load of
> 2 EM172's You might want to try them without the batt box 1st.
> On Behalf Of Eric Vogel
> Sent: Saturday, October 22, 2011 9:06 AM
> Subject: Re: [Nature Recordists] Re: Telinga clip-ons?
> Hi folks - I'm interested in this discussion as I am in the process of
> building a pair of mics with EM-172 capsules for my LS-10.
> The data sheet on the EM-172 is implies they should run at five volts
> with 3k9 load resistor. And the frogloggers site where I got the
> capsules includes this statement
> /The EM172 ECM must be operated at or near its nominal operating
> voltage. Operation at too low a /
> /voltage will produce excessive self-noise. /
> I am building a battery box with a modestly regulated supply to meet
> that spec.
> It sounds like you are running these with PIP and if so, have you
> measured the current flow through the capsule? I'd be curious to what
> you found.
> On 10/22/2011 5:21 AM, Mike Rooke wrote:
>> "so we compare noise floors equally (if thats possible) I'd say
>> they (the
>> EM172s) are nearly identical with a lower noise floor above 15 Khz."
>> Higher noise rather than lower, the shure capsules tail off the primo
>> is flat in the same region. Thus with the shure capsule the noise
>> is warm sounding and the primo more prominent where our ears are the
>> most sensitive.
--- In "Kawika" <>
> Hi all,
> I am re-visiting Guatemala in January (I led a series of tours
> there in the 1980's) and want to go low-profile with recording
> gear, leaving behind SD702, MKH20 SASS, M-S set-up, and Telinga
> dish. I will be taking both Sony D50 and PCM 10 for recorders, and
> I'm looking at the Telinga clip-ons to use with either recorder for
> ambient sounds in quiet forest as well as market-places. Can
> anyone offer recent experience with this set-up?
> Here are some notes from some testing work by Rob Danielson et.al.
> from last year
> and more--
> (for Klas--I can't seem to find out much recent info from your site
> or elsewhere about these)
> Many thanks,