Class B airspace is used where there is heavy traffic, which is when VFR
codes are typically suppressed. My advice is only to make a phone call
before laying down your cash.

On the other hand, Marc does make a good point which is "A transponder will
trigger ACAS/TCAS, whether or not the controllers happen to be paying
attention to it..."

Ivan


"BTIZ" wrote in message
news:kwy6b.46455$Qy4.20716@fed1read05...
I doubt that they would suppress 1200 within the approach control area
around a class B airspace (ModeC Veil)

BT

"Ivan Kahn" wrote in message
news:lgw6b.378053$o%2.170703@sccrnsc02...
Before you invest in a transponder, call the facility with radar
coverage
in
your area and find out if they routinely "supress" VFR codes during the
times you fly. When the screen gets busy some facilities supress VFR
codes,
and so a transponder would in fact be a waste of money.

Ivan