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-   -   How to Convert the Old Line Weights to Modern AFTMA Line Weights; (http://www.theflyfishingforum.com/forums/fly-lines/233691-how-convert-old-line-weights-modern-aftma-line-weights.html)

Hardyreels 01-29-2012 08:19 PM

How to Convert the Old Line Weights to Modern AFTMA Line Weights;
 
For those members who buy or inherit old fly rods that bear the letter line weight designation on the butt sections, use this; Fly line conversion to old-style letter to figure things out.

fire instructor 01-29-2012 09:12 PM

Re: How to Convert the Old Line Weights to Modern AFTMA Line Weights;
 
I'm confused.... I have an old 40+ y/o Wonderrod that's listed as using C, D, HDH, HCH, and 8H lines.

According to your chart:

C = 7 level
D = 6 level
HDH = 6 DT
HCH = 7 DT
8H = un-listed....

So I'm thinking I should throw a 6 or 7 WF on it, and give it a shot....

Hardyreels 01-29-2012 10:13 PM

Re: How to Convert the Old Line Weights to Modern AFTMA Line Weights;
 
Hi Rick,

The chart is just one I have had in my browser for a few years. Since this comes up time to time I thought it may serve as a general guideline to sort out line from old to new.

Ard

HuronRiverDan 01-30-2012 10:12 AM

Re: How to Convert the Old Line Weights to Modern AFTMA Line Weights;
 
Ard,
Thanks for posting the chart; I've had several people ask about line sizes on old rods...This saves me from looking it up..:)
Dan

wjc 07-14-2012 07:12 AM

Re: How to Convert the Old Line Weights to Modern AFTMA Line Weights;
 
Thanks Ard! Now I know what weight line I was throwing as a kid on my South Bend rod, and why the WF line seemed so heavy.

Liphookedau 07-14-2012 07:32 AM

Re: How to Convert the Old Line Weights to Modern AFTMA Line Weights;
 
Rick I think you'll find a #6WF will be Fine,a #5 Rio Grand might even be OK ??
The reason The Early Lines were heavy they became waterlogged.
I remember the HCH or 7 DT Lines very well,from the late 50s,early 60s until The Weight Fowards arrived on the scene as they were all you could buy.
I still have a new HCH Line on a Reel I kept as I was chasing a Hardy's Classic Top of The Range Rod which belonged to a Fishing Mate of my Fathers which I had hoped to purchase & one day use,however now I would probably use a modern DT or even a WF Line instead.
Brian.

nickj 07-14-2012 08:56 AM

Re: How to Convert the Old Line Weights to Modern AFTMA Line Weights;
 
Thanks, a useful chart. That said, some of the old lines/weights/rods are somewhat iffy. I have an old Orvis Madison, recommended weight is HGH but throws a 6 weight beautifully.

overmywaders 08-24-2012 05:57 PM

Re: How to Convert the Old Line Weights to Modern AFTMA Line Weights;
 
That chart, made by SA, may have been accurate years ago for the Scientific Angler lines, but little else.

You can't get from diameters to line weights; there are too many variables.

Think about it, the difference in weight between silk, Nylon, and PVC is tremendous. Then, the silk or Nylon braided line would have been "oil finished". Since different manufacturers used different oil/varnish/resin mixes, there is another weight variable. Tight braid or loose braid?

The taper itself is the greatest factor to consider. Silk, and later Nylon, lines might have up to twelve feet of level line at the tip. Then the front taper might have been four feet or fifteen feet. If it was a WF, the belly might have been six feet or thirty feet. Then you have the "holding line", the back taper, and the running line... all variables.

So, how can HCH translate into a weight? It can't.

"You can't get there from here." :)


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