Calling Ektelon Model H experts

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caprivi

Rookie
Hi,
I just got an Ektelon Model H and was trying to calibrate it. Although my tension head looks like the one in the manual, there is no adjustment screw/hole in the back of the catch assembly as drawn in the manual--it's just solid metal. So I'm wondering if this is an earlier model tension head and what is the alternate way of adjusting the tension scale.:confused:
Thanks.
 
My officemate has a model H. I'll ask him tomorrow whether he has the adjustment screw/hole or not and if he doesn't, how he calibrates.
 
i never needed to calibrate my machine since i checked it and it was spot on. but i always thought you adjusted it using the two nuts that are on the knob. but i got this machine from someone that didn't have a manual so i have no idea.
 
I don't think the two nuts affect the pointer. They just hold the knob from sliding off, I believe. Anyways, using the Berkley digital fish scale, the reading is pretty consistently around 4lbs under; so I'll just always add 4 from my initial setting and go from there.
Thanks for your help.
 
If you check p. 13 of the manual, it shows you how to calibrate by adjusting the cap screw which is on the side of the tension head (you will also note that instruction number 3 on that page contemplates the set screw which is on some but not all H machines.). The first time you do it this way will be a little bit of trial and error but it still should not take you that long. Good luck.
 
Last edited:
Ah, ok. The cap screw on my machine is tightened pretty tight and I don't have the proper wrench to loosen it at the moment. Also, when I used the old mechanical Ektelon calibrator that came with the machine, the tension is accurate; so there seems to be a bit of a discrepancy between this calibrator and the Berkley fish scale. I suppose my next step is to calibrate the fish scale with some weights.
 
The Berkley fish scale was within an ounce of the Postal scale @15lbs so I'm gonna assume it's the more accurate calibrator. I'm just going to add a "+4 for good luck" clause when setting tension since I don't want to mess with that cap screw and with string creep, lock-out, and other factors--in the end, it's repeatability and not absolute accuracy that's important in setting tension. Thank all for your help.
 
It takes longer to adjust the tension head than to adjust the tension. If it is off a pound or two adjust the set tension to make up the difference.

Irvin
 
Yes, that's what I do.

On a different topic--This is the first lock-out machine that I've used. On my drop-weight, I would pull tension, then release the clamps, then adjust the horizontal bar to final tension, then set clamp. On stretchy strings, I think this makes a difference.

So for constant pull machine users, do you release the first clamp, then set the second clamp? Or do you just set the second clamp without releasing the first one?

For crank users, I suppose you can try releasing the first clamp while cranking but before the lock-out occurs, but this seems kind of risky.
 
I am not too sure what you mean by the first and second clamp. I have fixed clamps and only move the one on the side the tension head is on. The other is still clamped on the last string tensioned.

Irvin
 
I've strung about 100 rackets so far on my Model H...and the lbs is still dead on. Hasn't changed a bit. Is everyone elses' like this?
 
I am also looking for the ektelon model H Manual. Can anyone send me the manual. Can email the manual to mtakakoATgmail.com
 
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