Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

Reply
 
Thread Tools Search this Thread
Old 05-21-05, 08:53 AM   #1
JenM
The new bee in town
Thread Starter
 
JenM's Avatar
 
Join Date: Apr 2005
Location: Los Angeles, CA
Bikes: a Logo and a Dyno Cruiser
Posts: 117
What DF is DF?

I can't figure out what it stands for. Thanks.
JenM is offline   Reply With Quote
Old 05-21-05, 09:52 AM   #2
Moonshot
Now with racer-boy font!
 
Moonshot's Avatar
 
Join Date: Jan 2004
Location: East Alabama
Bikes: 2004 Litespeed Tuscany, Trek 5500, Breezer Storm, Bianchi road bike (fixed)
Posts: 1,272
Can you use it in a sentence?
__________________

www.eastalabamacycling.org
Moonshot is offline   Reply With Quote
Old 05-21-05, 10:09 AM   #3
Nightshade
Humvee of bikes =Worksman
 
Nightshade's Avatar
 
Join Date: May 2004
Bikes:
Posts: 5,363
lame.....real lame......
Nightshade is offline   Reply With Quote
Old 05-21-05, 10:25 AM   #4
Dr. Moto
Senior Member
 
Join Date: Apr 2005
Location: Richmond, VA
Bikes: Motobecane, Douglas, Trek
Posts: 375
Divorced Female?
Dr. Moto is offline   Reply With Quote
Old 05-21-05, 11:57 AM   #5
Trsnrtr
Nefarious Reprobate
 
Trsnrtr's Avatar
 
Join Date: Jun 2002
Location: Central Illinois
Bikes: Colnago CX, Giant Propel, Spec. Roubaix Pro, Co-Motion Supremo
Posts: 7,377
Quote:
Originally Posted by JenM
I can't figure out what it stands for. Thanks.
It stands for Diamond Frame and is shorthand that recumbentists use for wedgies, oops, I mean upright bikes.
__________________
Dennis T
Trsnrtr is offline   Reply With Quote
Old 05-22-05, 01:25 AM   #6
JenM
The new bee in town
Thread Starter
 
JenM's Avatar
 
Join Date: Apr 2005
Location: Los Angeles, CA
Bikes: a Logo and a Dyno Cruiser
Posts: 117
Quote:
Originally Posted by Tightwad
lame.....real lame......
What? That I asked an honest question?
JenM is offline   Reply With Quote
Old 05-22-05, 02:37 AM   #7
lilHinault
.
 
Join Date: Apr 2005
Location: .
Bikes: .
Posts: 3,094
Diamond Frame... heh. I didn't know either!

I"m used to DF = Direction Find, as in radio transmitting, finding a transmitter.
lilHinault is offline   Reply With Quote
Old 05-22-05, 02:42 AM   #8
khuon
DEADBEEF
 
khuon's Avatar
 
Join Date: Aug 2002
Location: Catching his breath alongside a road near Seattle, WA USA
Bikes: 1999 K2 OzM, 2001 Aegis Aro Svelte
Posts: 12,242
Quote:
Originally Posted by lilHinault
Diamond Frame... heh. I didn't know either!

I"m used to DF = Direction Find, as in radio transmitting, finding a transmitter.
As in an ADF...

I took DF to mean "don't fragment".

Okay, so I actually knew that DF meant diamond frame but I just like being a smarta$$.
__________________
1999 K2 OzM 2001 Aegis Aro Svelte
"Be liberal in what you accept, and conservative in what you send." -- Jon Postel, RFC1122
khuon is offline   Reply With Quote
Old 05-22-05, 03:55 AM   #9
lilHinault
.
 
Join Date: Apr 2005
Location: .
Bikes: .
Posts: 3,094
ADF = automatic DF, like your basic doppler set does to find that @#$%@#$% fox....
lilHinault is offline   Reply With Quote
Old 05-22-05, 05:25 AM   #10
CommuterRun
Conservative Hippie
 
Join Date: Mar 2005
Location: Wakulla Co. FL
Bikes:
Posts: 4,271
DF-Diamond Frame. Well, that's the one thing I learned new for today. Met my quota.

I'm vaguely familiar with RDF. We used to use it for navigation when we went off-shore, fishing. This was back before LORAN A. Does that date me?
CommuterRun is offline   Reply With Quote
Old 05-22-05, 11:58 AM   #11
khuon
DEADBEEF
 
khuon's Avatar
 
Join Date: Aug 2002
Location: Catching his breath alongside a road near Seattle, WA USA
Bikes: 1999 K2 OzM, 2001 Aegis Aro Svelte
Posts: 12,242
Quote:
Originally Posted by CommuterRun
I'm vaguely familiar with RDF. We used to use it for navigation when we went off-shore, fishing. This was back before LORAN A. Does that date me?
Radio Direction Finder? In aviation we used ADFs (automatic direction finders) which would basically lock onto an NDB (non-directional beacon)... essentially any omni-directional AM transmitter including radio station towers. The NDBs used were fixed and marked on maps. A lot of times one would use the approach marker beacons... usually the LOM (locator outer marker). The ADF was a very complicated and expensive piece of hardware mainly because of the mechanics and installation. It was big and heavy too. The nice thing about ADF/NDBs is that the technology and principles of operation are fairly robust. However, the skills required to execute an NDB approach were fairly tough to master and one of the most dreaded things during IFR training... especially if one had to do it with a non-slaved CDI/HSI (course deviation indicator/horizontal situation indicator) because you have to cross reference across two different instrument displays to determine your radial position. The ADF is used along with a DME (distance measuring equipment) to determine your location from the beacon. Another benefit of ADF/DME equipment is for use in SAR operations to locate ELTs (emergency locator transmitters).
__________________
1999 K2 OzM 2001 Aegis Aro Svelte
"Be liberal in what you accept, and conservative in what you send." -- Jon Postel, RFC1122
khuon is offline   Reply With Quote
Old 05-22-05, 12:13 PM   #12
sukispop
Errand Boy for my girls
 
sukispop's Avatar
 
Join Date: Apr 2004
Location: Northern California
Bikes: Greenspeed GTO 20/20 trike, Rans Fusion(semi-recumbent bike), Burley Django recumbent, Marin Larkspur city bike
Posts: 148
Quote:
Originally Posted by Tightwad
lame.....real lame......
I'll tell you what "real lame" is--

It's when a forums member can't find the common decency or courtesy to give a simple and friendly answer to a sincere and friendly question.


The next time that you find a member's question lame...real lame....why don't you do us all a favor, and pass on posting any kind of reply, and keep your nastiness to yourself?

sukispop is offline   Reply With Quote
Old 05-22-05, 01:14 PM   #13
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Quote:
Originally Posted by sukispop
I'll tell you what "real lame" is--

It's when a forums member can't find the common decency or courtesy to give a simple and friendly answer to a sincere and friendly question.


The next time that you find a member's question lame...real lame....why don't you do us all a favor, and pass on posting any kind of reply, and keep your nastiness to yourself?

Don't worry about him, that guy is an accredited forum troll. Press ignore.
operator is offline   Reply With Quote
Old 05-22-05, 01:55 PM   #14
sukispop
Errand Boy for my girls
 
sukispop's Avatar
 
Join Date: Apr 2004
Location: Northern California
Bikes: Greenspeed GTO 20/20 trike, Rans Fusion(semi-recumbent bike), Burley Django recumbent, Marin Larkspur city bike
Posts: 148
Quote:
Originally Posted by operator
Don't worry about him, that guy is an accredited forum troll. Press ignore.
Thanks for the info, operator!

'Just more evidence that God must have had a migraine when he created trolls....

sukispop is offline   Reply With Quote
Old 05-22-05, 02:38 PM   #15
CommuterRun
Conservative Hippie
 
Join Date: Mar 2005
Location: Wakulla Co. FL
Bikes:
Posts: 4,271
The RDF we had worked like the ADF you describe, Khuon, except everything was manual. The base of the unit had to be oriented to north, then rotate a knob to align the directional antennae with the signal you wanted to pick up, an indictator needle aligned with the antennae pointed out the direction to the signal on a compass rose printed on the base of the unit. Plot this azimuth on a chart then do it all again with a different signal. Where the two lines crossed was our location. Funny how cutting-edge stuff back then sounds pretty crude now, but remember, this was back when a computer took up an entire large room and a thing that was to be called a PC was still quite a few years away. Heck, there were even real Hippies still around back then.

We kept using this unit through the LORAN A years and later switched to LORAN C. After loosing the boat to a hurricane many years ago, and later Grandpa to cancer, none of us fish offshore anymore. These days my Dad, brothers and I pretty much stick to inshore and freshwater and like everybody else, we use GPS.

Don't know whatever happened to that old RDF unit. Wish I still had it.
CommuterRun is offline   Reply With Quote
Old 05-22-05, 03:33 PM   #16
lilHinault
.
 
Join Date: Apr 2005
Location: .
Bikes: .
Posts: 3,094
ADF's been around a long time, the Japanese planes that bombed Pearl Harbor used radio station KGMB in Honolulu as a signal to DF coming in.......

check out "radiosport" it's a modern, fun "sport" where you use a directional VHF antenna to DF and find a "fox" or hidden transmitter.
lilHinault is offline   Reply With Quote
Old 05-22-05, 08:16 PM   #17
JenM
The new bee in town
Thread Starter
 
JenM's Avatar
 
Join Date: Apr 2005
Location: Los Angeles, CA
Bikes: a Logo and a Dyno Cruiser
Posts: 117
It's good to know not all DF riders have a stick up their _ _ _ _!
JenM is offline   Reply With Quote
Old 05-22-05, 10:14 PM   #18
khuon
DEADBEEF
 
khuon's Avatar
 
Join Date: Aug 2002
Location: Catching his breath alongside a road near Seattle, WA USA
Bikes: 1999 K2 OzM, 2001 Aegis Aro Svelte
Posts: 12,242
Quote:
Originally Posted by lilHinault
ADF's been around a long time, the Japanese planes that bombed Pearl Harbor used radio station KGMB in Honolulu as a signal to DF coming in.......
You might be surprised to find that many things in aviation are actually quite old and "antiquated" technology. For instance, many light aircraft engines are basically a high-powered equivalents of lawn mower engines. Fuel injection? Electronic ignition? Not in those Cessna 172s flying out of PAO. We're talking good old carbs and magnetos. The advantage however is that if you have a total electrical system failure, the engine will continue to run.
__________________
1999 K2 OzM 2001 Aegis Aro Svelte
"Be liberal in what you accept, and conservative in what you send." -- Jon Postel, RFC1122
khuon is offline   Reply With Quote
Old 05-22-05, 10:39 PM   #19
azesty
Hot in China
 
azesty's Avatar
 
Join Date: Apr 2005
Location: China
Bikes: Giant Lava
Posts: 961
I have done underwater tracking of Leafy Seadragons. Radio, except for very long wavelengths, wont work in salt water, so we had to use sonic tags, and a manual directional microphone pointing technique. Not that old, but different.

a
azesty is offline   Reply With Quote
Old 05-22-05, 10:44 PM   #20
khuon
DEADBEEF
 
khuon's Avatar
 
Join Date: Aug 2002
Location: Catching his breath alongside a road near Seattle, WA USA
Bikes: 1999 K2 OzM, 2001 Aegis Aro Svelte
Posts: 12,242
Quote:
Originally Posted by azesty
we had to use sonic tags, and a manual directional microphone pointing technique. Not that old, but different.
Hydrophones have been around a long time too.
__________________
1999 K2 OzM 2001 Aegis Aro Svelte
"Be liberal in what you accept, and conservative in what you send." -- Jon Postel, RFC1122
khuon is offline   Reply With Quote
Old 05-22-05, 11:00 PM   #21
lilHinault
.
 
Join Date: Apr 2005
Location: .
Bikes: .
Posts: 3,094
Morse Code.
lilHinault is offline   Reply With Quote
Old 05-22-05, 11:05 PM   #22
dm_fuel100
Bike Geek
 
dm_fuel100's Avatar
 
Join Date: Mar 2005
Location: Colorado
Bikes: Trek Fuel100, Litespeed Obed 1 speed, Orbea Force Carbon, Mongoose Team SX, Giordana Spica
Posts: 67
Quote:
Originally Posted by Trsnrtr
It stands for Diamond Frame and is shorthand that recumbentists use for wedgies, oops, I mean upright bikes.
Diamond Frame? Huh, and all this time I thought they were my initials.
dm_fuel100 is offline   Reply With Quote
Old 05-25-05, 04:34 AM   #23
Juha
Formerly Known as Newbie
 
Juha's Avatar
 
Join Date: Mar 2002
Location: Helsinki, Finland
Bikes:
Posts: 6,263
Quote:
Originally Posted by CommuterRun
Funny how cutting-edge stuff back then sounds pretty crude now, but remember, this was back when a computer took up an entire large room and a thing that was to be called a PC was still quite a few years away. Heck, there were even real Hippies still around back then.
OK, I'll reluctantly buy the stuff about computers. But what are these Hippies you claim to have seen?

--J
__________________
To err is human. To moo is bovine.

Who is this General Failure anyway, and why is he reading my drive?


Become a Registered Member in Bike Forums
Community guidelines
Juha is offline   Reply With Quote
Old 05-25-05, 08:48 AM   #24
eubi
No Rocket Surgeon
 
eubi's Avatar
 
Join Date: Jan 2005
Location: Corona and S. El Monte, CA
Bikes: Cannondale D600, Dahon Speed T7
Posts: 1,648
Quote:
Originally Posted by lilHinault
Morse Code.
If we're talking HAM lingo, Morse Code is "CW" (Continuous Wave).

KG6NPA
eubi is offline   Reply With Quote
Old 05-25-05, 10:00 AM   #25
jsharr
You Know!? For Kids!
 
jsharr's Avatar
 
Join Date: Apr 2005
Location: Just NW of Richardson Bike Mart
Bikes: '05 Trek 1200 / '90 Trek 8000 / '? Falcon Europa
Posts: 6,153
Quote:
Originally Posted by Juha
OK, I'll reluctantly buy the stuff about computers. But what are these Hippies you claim to have seen?

--J
I think the alledged "hippies" were just a hallucination brought on by some bad shrooms.
__________________
Are you a registered member? Why not? Click here to register. It's free and only takes 27 seconds! Help out the forums, abide by our community guidelines.
Quote:
Originally Posted by colorider View Post
Phobias are for irrational fears. Fear of junk ripping badgers is perfectly rational. Those things are nasty.
jsharr is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 12:28 AM.