"Tom Holden" ) writes:
Avery Fineman wrote:
[snip]
As to the attack and decay times you specified, seems
good to me. That can be set to suit the individual
listener.

Len Anderson
retired (from regular hours) electronic engineer person

Here is my survey on which I based my targets:

Release-ms
Receiver Attack-ms Slow Medium Fast

AOR AR7030 2/8 SSB/AM 1800 400 -
Collins 75S-3B/3C 1 600 190 -
Drake R4C 1 1000 350 50
Drake R8B 1 2000 300 -
Grundig Satellit 800 1 3000 300 -
Rockwell/Collins HF-2050
30 3500-10000 250+/-50 -


U.S. Federal 30 800-1200
SSB/ICW modes
Telecommunication
Recommendation 1050-1998
"HF Radio Automation
Link" 13
25 Data Mode

Design Target 1-13 1800-3000 300 25

I wonder if there is any merit in making the attack selectable within a
range of 1-30 ms.

Tom


Traditionally, the circuitry was too bulky to make it more complicated,
so there was always tradeoff. With semiconductors the added circuitry to
make attack and decay independent doesn't require much space, or added
cost. Once one has that in place, one can fiddle with the actual times.
Maybe making it completely variable is not useful, but it'll only cost
a switch to add multiple times.

Michael VE2BVW