Malcolm Stewart wrote:
Surely the MD raises the voltage from the 1.5AA cell to something offering
greater headroom.

You think? I don't!, However that said I've never tried to measure it

Perhaps I will when things settle down a bit


--
John F Davis, in Delightful Detroit. WA8YXM(at)arrl(dot)net
"Nothing adds excitement like something that is none of your business"
Diabetic? http://community.compuserve.com/diabetes

"John in Detroit" wrote in message
news
Malcolm Stewart wrote:
Surely the MD raises the voltage from the 1.5AA cell to something
offering
greater headroom.

You think? I don't!, However that said I've never tried to measure it

Perhaps I will when things settle down a bit


So far, I've measured the "plug-in power" volts at the mic input, and it's
2.31V on my NH900 when running off a nominal 1.2V NiMH cell. What I don't
know is what the general power supply rails are within the NH900.

--
M Stewart
Milton Keynes, UK
http://www.megalith.freeserve.co.uk/oddimage.htm

Thanks, you saved me the trouble of measuring it.

However....... 2.31 is still a long way from 9v when it comes to rock
bands and the like

Malcolm Stewart wrote:
"John in Detroit" wrote in message
news
Malcolm Stewart wrote:

Surely the MD raises the voltage from the 1.5AA cell to something

offering

greater headroom.

You think? I don't!, However that said I've never tried to measure it

Perhaps I will when things settle down a bit



So far, I've measured the "plug-in power" volts at the mic input, and it's
2.31V on my NH900 when running off a nominal 1.2V NiMH cell. What I don't
know is what the general power supply rails are within the NH900.


--
John F Davis, in Delightful Detroit. WA8YXM(at)arrl(dot)net
"Nothing adds excitement like something that is none of your business"
Diabetic? http://community.compuserve.com/diabetes

John in Detroit wrote:
Thanks, you saved me the trouble of measuring it.

However....... 2.31 is still a long way from 9v when it comes to rock
bands and the like

But again, John, that 9V won't do you a bit of good if the
peak to peak clip limit of the MD pre input is 2.31V or
less. I think the PIP is always greater on these devices
than the PtoP rails of the pre.

With a mic like the DS70P, for example, which can be powered
by PIP, no battery box will increase max SPL handling. In
general, the maximum voltage that need be used in a battery
box is a bit above the rails of the device input. Having
said that, however, going to larger voltages can potentially
keep the capsule in a more linear region for those rails and
give less distortion for the same output. That is far from
guaranteed.


Bob
--

"Things should be described as simply as possible, but no
simpler."

A. Einstein

Bob Cain wrote:

Having said that, however, going to larger voltages
can potentially keep the capsule in a more linear region for those rails
and give less distortion for the same output. That is far from guaranteed.


My point exactly... Bob, My point exactly


--
John F Davis, in Delightful Detroit. WA8YXM(at)arrl(dot)net
"Nothing adds excitement like something that is none of your business"
Diabetic? http://community.compuserve.com/diabetes