Darryl Ramm wrote:

Always be careful of comparing specs. There is no standard way of
measuring/quoting typical power consumptions and different vendors may
quote different specs. Here are some --

Internal Encoder
Trig TT-250 130W (nominal at connector) Mode-S 0.28A typical @ 14V

External encoder
Mode-S Becker BXP 6401-2-(01) 140W (nominal at connector) 370mA
typical @ 50 replies/sec @ 14V
Mode-C Becker ATC 4401-1-175 175W (nominal at connector) 700mA max @
14V, less than 400mA @ 12V typical measured in actual use (i.e pretty
much the same as the BXP 6401-2-(01) claimed specs)
Mode-C Microair T2000SFL (200W nominal at connector) 150-200mA @ 14V

I know the brochure quotes this, but the two installed current
measurements I heard of were over 300 ma on the ground, no
interrogations. Do other pilots have actual installed measurements for
their Microair transponders?

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly

* "Transponders in Sailplanes" http://tinyurl.com/y739x4
* Sections on Mode S, TPAS, ADS-B, Flarm, more

* "A Guide to Self-launching Sailplane Operation" at www.motorglider.org