Guy Alcala wrote in message ...
Buzzer wrote:

On Sat, 09 Aug 2003 16:12:58 GMT, Ed Rasimus
wrote:

Buzzer wrote:

Center going out as you got closer to source.If I remember right on
the APR-25 a really strong signal would cause the signal to go to the
outer edge of the scope and curl back in a loop. Lots of strong
signals - lots of loops..

See my previous regarding proximity vs signal strength. Sure, as you
get closer, you get a stronger signal, but the parameter was strength.

Probably why I set the sensitivity of each freq band to x db that
would give y deflection. Instead of x number of yds from sam site
would give a certain deflection since not all sam sites put out the
same exact power?G

No looping. The strobe went out to the limit of the display, that's
all.

Must have looped on the bench due to the loopy technician.

I have a vague memory of seeing a photo or film of an APR-25 display
somewhere, which IIRR did loop. Maybe this was film of a bench test, and
you'd never get close enough to a site in flight for the signal strength to
be great enough for that to happen?

And now I have confirmation of APR-25 looping. I finally got my hands
on a copy of Thornborough's "Iron Hand", which is indeed chock full of
good stuff as Ed said. In it there's an account by an F-4CWW guy of a
mission on Night Four of LB II, which I had previously read in the 2nd
edition of Thornborough's "The Phantom Story", by Bill McLeod (and
which have been the vague memory that was nagging me, rather than a
photo or film):

"The EC-121 called us about a minute before the last B-52 was clear
and told us that we were the last a/c remaining in the target area,
and made it plain that they thought that we should get out of there.
As soon as I answered the EC-121, Red Crown came up on Guard and
announced 'SAM, SAM, SAM!', which was followed by Don's calm voice
from the rear cockpit saying 'We're the target'.

"The APR-25/-26 lit up with a classic full-system launch with a strobe
that went clear to the edge of the scope and part way back to the
center, the launch audio started screaming and two SAMs lifted off at
our eleven o'clock. I kicked my left rudder to put hte strobe and
missiles at twelve o'clock and fired both Shrikes at the guy, then
rolled into an inverted slice and pulled the a/c towards the ground
with at least 4-5g. As soon as the nose was well down, I rolled out
part of the bank and reacquired the two SAMs over the canopy rail."
rest of account snipped

I don't know if the APR-25 was adjusted incorrectly so that it was
oversensitive, or if it was operating correctly and they were really
that close/the signal was that strong. McLeod mentions that they'd
been orbiting at about 18,000 feet, and his account implies that they
were offset several miles from the site at the time the SA-2s were
fired.

Guy