TaxSrv wrote:
A transponder contains what is termed a Crystal Oven. This is a small
chamber in which there is a heating element and a quartz crystal used
to determine the transponder's transmission frequency.

Which brands/models have that feature?? The frequency accuracy
required by the TSO can be and is achieved without a crystal oven.

The built-in turn-on delay is merely to allow the high-voltage
supply to come up to full volts, and the cavity tube filament to
heat up.

Be that as it may, I believe most transponders just wait a static timeout
amount (30-45 sec), whenever transitioned from OFF to ON, even if you've
already had it on.

--- Jay


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