Hi all, Looking for the TT brains trust to help me out with this issue: I have two drums of LDF4-50 and one of LDF5-50 which have been stored on their sides for around 10 years. This disobeys one of
Author: Patrick Greenlee <patrick_g@windstream.net>
Date: Tue, 12 Apr 2016 14:04:53 -0500
A tdr (without a scope for a visible display) needs to see a step function, an impedance lump. A gentle variance will not be reported well. Comparing a known good length of the same material to your
Author: Dick Blumenstein <rcblumen@centurylink.net>
Date: Tue, 12 Apr 2016 15:12:48 -0400
Not sure what you mean by the "drums vertical"? Do you mean that the wire is mostly vertical being stored on the drums; that the drums are sitting on edge? Dick K0CAT == David Aslin G3WGN wrote on 4/
The cable is circular...it shouldn't matter. I would think that the requirement to store a certain way is for drainage possibly. _______________________________________________ ______________________
I've handled many hundreds of reels of Heliax over decades, and never worried much about that warning, which has more to do with creating egg shaped cable (from the weight of the upper layers) than t
I do not see how the center could migrate unless the cable got crushed. I thought that the reason for storing it vertically was because the spool is not strong laying on the side and it could break a
Thanks for all the thoughts both on- and off-reflector. I'm initially concluding that inner conductor migration is not the reason for the 'store vertically' warning on the drums. I'll do a TDR and im
Right-O. It has nothing to do with migration of the center conductor, but rather deformation of the shield. If the reels if LDF were laid down gently (as opposed to being flopped on its side as what
Agreed that the main concern has been transportation and rough handling. Fork lift operators are evil people. AVA with it's thinner shield is more prone to fork damage for sure, but it's lighter weig
Thanks Jim. I learned about the DG8SAQ device after I'd already bought the AIM4170C. The AIM is a fine analyser but it tops out at 180MHz so I won't see quite such fine detail. May be time to upgrade