Harold, I think 24" is for the lower part of the band. I've cut these 18.5". I used your procedure today and it went well although the dips for .9 IL were 4.3 dB instead of your 9.0 dB. I connected everything together and ended up with 3.3 dB total after tweaking each pass rod slightly.
lh On Wed, Apr 21, 2010 at 9:46 PM, hfarrenkopf <hfarrenk...@yahoo.ca> wrote: > > > I don't know if it was published.. Set your cans for 0.9dB IL each and your > end result will be 3.2dB. The notch cavity should be set to maximum depth > unless you have a very close frequency down the chain (<0.5MHz away).The > notch is tuned to the pass frequency. > > The 3 pass cans will produce 3 return loss dips - remember to use a load on > the unterminated ports of the filter when using the RTB. > > I can't locate the length of the cable between the pass cans but I think my > memory is saying 23 inches tip to tip. > > > --- In Repeater-Builder@yahoogroups.com<Repeater-Builder%40yahoogroups.com>, > Larry Horlick <llhorl...@...> wrote: > > > > Harold, > > > > I used 2 cans in my initial post for simplicity. What I'm working on is a > > 2037, 3 pass and one notch and I need 3 dB, so 1 dB per can. I'm not > moving > > them very far from the original setup, but I want to verify the IL. Is > there > > a published chart for these settings? > > > > Indeed, still in VY0 land... > > > > > > lh > > > > On Wed, Apr 21, 2010 at 7:54 PM, hfarrenkopf <hfarrenk...@...> wrote: > > > > > > > > > > > Just looked up the settings in my files. 9dB notch at 160MHz produces > > > 1.4dB. 11 to 11.5 will produce your desired 0.9dB Insertion Loss. > > > 14 to 15 dB produces the 0.40dB IL. > > > > > > The cable adds 0.2dB. The settings of 2 cans from Sinclair are > typically > > > 1.0, 2.0 or 3.0dB. > > > > > > Larry, are you still up in Iqaluit? > > > > > > Harold, VA3HF > > > > > > > > >
