07-16-2018, 09:51 AM
AFAIK the D440 that uses same tip as 8200 were discontinued in the '70s, never seen one of those with tip retaining screws. I have a couple, are considered ancient by today's std.
Both a D550 & D650 are available but have tip retaining screws. Modern 550 have similar wattage to 440 & 650 is similar to old 550. Both use the large tips. Their tip retaining does have a "beefed" ring but IMO the nuts were still far better.
I have what's probably a early/mid 1960s D550 rated 240/325 watt. Picked it up at a junk shop for $15, was barely used.
Both a D550 & D650 are available but have tip retaining screws. Modern 550 have similar wattage to 440 & 650 is similar to old 550. Both use the large tips. Their tip retaining does have a "beefed" ring but IMO the nuts were still far better.
I have what's probably a early/mid 1960s D550 rated 240/325 watt. Picked it up at a junk shop for $15, was barely used.
Tom