Hi,
I'm wondering if I find a Yagi taper schedule (imperial) like this for
6el 20m
how I should "translate" them into European tube diameters?
...for example:
1 0.875 0.75 0.625 0.5
0.00 48 24 44 36 65.73
90.00 48 24 44 36 58.70
1 inch (25.4mm) is easy, we have D25mm tube.
0.875 inch (22.225mm) is still OK, we have D22mm
But, what I should use in case of
0.75 inch (19.05mm), we have 18mm or 20mm diameter.
0.625 inch (15.875mm), we have 15mm and 16mm (I think this should go for
16mm).
1.25 inch (31.75mm), we have 30mm and 32mm. Should it be 32mm?
In general:
How critical the tube diameters are when I match them from the imperial
model to the metric?
Can I maintain the same modeled performance if I have ~5% difference
between metric and
imperial modeled diameters?
Is there any % tolerance?
I know re-modeling would be the best but I'm not an expert in that which
I could rely on...
Thanks a lot for your help in advance.
73!
Csaba HA3LN
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