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  1. #1
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    Default 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.

    Here's a second conversion chart compliments of the Orvis Company; Orvis Fly Line Conversion Tables

    Just scroll down the page a bit and you'll find the tables.
    Last edited by Ard; 10-26-2017 at 10:55 PM.

    Anywhere can be the land of great expectations, broken dreams, or paradise found, it's all up to you.

    Life On The Line - Alaska Fishing with Ard
    Ard's Forum blog, Alaska Outdoors

  2. #2
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    Default 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....
    - Rick

    "A leader with great passion and few skills always outperforms a leader with great skills and little passion." Chief Rick Lasky

  3. #3
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    Default 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

    Anywhere can be the land of great expectations, broken dreams, or paradise found, it's all up to you.

    Life On The Line - Alaska Fishing with Ard
    Ard's Forum blog, Alaska Outdoors

  4. #4
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    Default 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

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  6. #5
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    south florida
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    Default 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.
    http://www.miterclamp.com/Images/N_Amer_FF.jpg Cheers, Jim

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  8. #6

    Default 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.

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  10. #7
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    Default 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.

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  12. Default 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."
    Best regards,
    Reed

    http://overmywaders.com

  13. Default Re: How to Convert the Old Line Weights to Modern AFTMA Line Weights;

    I purchased an old South Bend steel rod a couple of years age. It is marked HDH, I will put a No. 6, weight forward line on it and try it out. It is marked as being 8'6", but about 4 inches must have been broken off the tip. Thanks for posting the chart.

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  15. #10
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    Default Re: How to Convert the Old Line Weights to Modern AFTMA Line Weights;

    Quote Originally Posted by overmywaders View Post
    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."
    Here's another conversion table compliments of the Orvis Company. They have a long history bamboo rod manufacturing as well as being one of the first to introduce graphite rods on a large scale to the modern market. Although the calculations may have faults I'm afraid they are what we have.

    Silk Fly Line Conversion Chart via Orvis

    Anywhere can be the land of great expectations, broken dreams, or paradise found, it's all up to you.

    Life On The Line - Alaska Fishing with Ard
    Ard's Forum blog, Alaska Outdoors

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