Skipp
Attached find a .pdf document that came with a DB 4080 duplexer I picked up second hand that was marked up by the DB factory showing the new cables needed and the loop sizes for a "2 meter" mod to the standard range VHF duplexer. I have used these measurements for other DB duplexers in this same family that I have moved from the commercial VHF frequency rantes to 2 meters and they seem to work fine after changing to these cable lengths. Paul K0LAV [email protected] ----- Original Message ----- From: "skipp025" <[email protected]> To: [email protected] Sent: Friday, October 9, 2009 12:37:11 AM GMT -06:00 US/Canada Central Subject: [Repeater-Builder] Decibel VHF BP (only) Duplexer Cable Measurements? re: Decibel VHF Band Pass (only) 4 or 6 Cavity - Duplexer Cable Measurements? Has anyone here in the Group ever really measured the Decibel Products VHF Band-Pass (only) 4 or 6 Cavity Duplexer factory cable lengths at any frequency? I was looking at one in a rack today... the center T to each side looks quarter wave and the loops between bottles look at least half wave. Has anyone actually recorded the original Decibel Products factory constructed lengths for any VHF Frequency pairs? ... and would be willing to share that information? cheers, skipp ps: Even measurements for VHF Frequencies through 160 and 173 MHz would be handy to have.
