Hi Jeff, Looks like success!
Did a ratio type calculation & then started with the wire cutters & trimmed a little at a time looking at the high side loss. Got it down to 0.6dB per can - with all of them connected, it's 3 dB. They do have the rotatable links in the cans. From what I read, it affects the loss and the notch depth. Checked the return on the TX, & had no reflected power. Gonna take it to the temporary site & run a while. Thanks again for the help - if you get to Utopia, give me a buzz - I owe you a meal!! Tim W5FN --- In [email protected], "Jeff DePolo" <j...@...> wrote: > > > Looks like there is 2 dB loss at a 600 khz + spacing > > (which is where the problems were). (all 4 cans = 2dB) > > 2 dB is fine for 4 cavities per side. If you are able to get under 2.5 dB > for those 4 cavities when retuned on 2m, I'd say you're doing pretty well. > > > What about the links inside the cans? I have a set of > > drawings for a lower freq range, but wasn't sure what > > that would buy for me. Can I just disconnect the link > > from the SO-239 center conductor & add some copper stock > > to make it longer (making sure the flat area gets longer)? > > The loops shouldn't require modification. Are the loops rotatable on this > unit? > > > Also, will the can's interconnect cables be an issue? They > > are about 9-10" currently. > > Yes, they will likely need to be scaled, but before you go through all of > that work, try it without redoing the harness and see what you get. You can > also add elbow adapters or "connector savers" at strategic locations to > lengthen the cables slightly, at least for testing, to see if it makes an > improvement. > > --- Jeff WN3A >
