Unfortunately my SPS200 is at home as I have been recording the inside of various oil drums and
water butts so I can't check for sure, but as far as I know it is balanced. If it ain't, they're
wasting a lot of pins on their ten pin connector which I believe (but am not) is a Lemo. Also, given
that they sell up to 100 metre long extension cables it's very unlikely that it isn't fully balanced
- and probably transformer balanced at that. Anything less would be a disaster in and sort of
significant rfi field.
Dave
On 26/04/2011 20:27, Fons Adriaensen wrote:
On Tue, Apr 26, 2011 at 05:41:18PM +0530, umashankar mantravadi wrote:
a very feasible idea. you really dont need transformer balancing (which i think
the PPAs provide). impedance balancing will do it, and any dc 6 volt supply
should work with the tetramic. i built john leonard a box wich provides
stabilisied 5 volts, but i think you might get away without even that. A quad
low noise opamp can provide reliable fixed gain. i am not sure, but is the sps
200 output balanced?
AFAIK it isn't. Not even impedance balanced unless the impedance
of the active pin is _very_ low indeed.
I very much like Dave's idea. Given the price the Tetramic is a
good deal. It's a bit too noisy for some applications but quite
OK for many. Its main drawbacks for me have been the fragility and
the less than satisfactory shielding of the cables and connectors.
Just fitting a full-size XLR-M6 to the tube body would probably
solve most issues.
Ciao,
--
These are my own views and may or may not be shared by my employer
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