开云体育

VHF Duplexer Identification

Jeff Acree All Messages By This Member #214464 Friends, ? Please take a look at the attached pictures and see if you can identify the duplexer.? it seems like it may be something along the lines of a Decibel Products DB4062-WOC-B.? In the Ham VHF repeater band, they seem to have about 1 dB per channel of passband insertion loss and about 75 dB of rejection in the notches.? Thoughts? ? Thanks! Jeff KC8VFN Picture1.jpg Picture2.jpg
Mike Besemer - WM4B All Messages By This Member #214465 开云体育 4062 is 6 cavities.? 4060 is 4 cavities.? Is the height 34.5 inches? ? toggle quoted message Show quoted text From: [email protected] <[email protected]> On Behalf Of Jeff Acree via groups.io Sent: Wednesday, April 9, 2025 9:40 PM To: [email protected] Subject: [repeater-builder] VHF Duplexer Identification ? Friends, ? Please take a look at the attached pictures and see if you can identify the duplexer.? it seems like it may be something along the lines of a Decibel Products DB4062-WOC-B.? In the Ham VHF repeater band, they seem to have about 1 dB per channel of passband insertion loss and about 75 dB of rejection in the notches.? Thoughts? ? Thanks! Jeff KC8VFN
Chris Boone WB5ITT All Messages By This Member #214470 Yes those are decibel DB4060s.. are they B range? I have a set on a Quantar that works just perfect.. Chris WB5ITT toggle quoted message Show quoted text On Wed, Apr 9, 2025, 8:45 PM Mike Besemer - WM4B via <mwbesemer=[email protected]> wrote: 4062 is 6 cavities.? 4060 is 4 cavities.? Is the height 34.5 inches? ? From: [email protected] <[email protected]> On Behalf Of Jeff Acree via Sent: Wednesday, April 9, 2025 9:40 PM To: [email protected] Subject: [repeater-builder] VHF Duplexer Identification ? Friends, ? Please take a look at the attached pictures and see if you can identify the duplexer.? it seems like it may be something along the lines of a Decibel Products DB4062-WOC-B.? In the Ham VHF repeater band, they seem to have about 1 dB per channel of passband insertion loss and about 75 dB of rejection in the notches.? Thoughts? ? Thanks! Jeff KC8VFN
Chris Boone WB5ITT All Messages By This Member #214471 And I'm getting 80db of notches toggle quoted message Show quoted text On Thu, Apr 10, 2025, 6:09 AM Christopher Boone <setxtelecom@...> wrote: Yes those are decibel DB4060s.. are they B range? I have a set on a Quantar that works just perfect.. Chris WB5ITT On Wed, Apr 9, 2025, 8:45 PM Mike Besemer - WM4B via <mwbesemer=[email protected]> wrote: 4062 is 6 cavities.? 4060 is 4 cavities.? Is the height 34.5 inches? ? From: [email protected] <[email protected]> On Behalf Of Jeff Acree via Sent: Wednesday, April 9, 2025 9:40 PM To: [email protected] Subject: [repeater-builder] VHF Duplexer Identification ? Friends, ? Please take a look at the attached pictures and see if you can identify the duplexer.? it seems like it may be something along the lines of a Decibel Products DB4062-WOC-B.? In the Ham VHF repeater band, they seem to have about 1 dB per channel of passband insertion loss and about 75 dB of rejection in the notches.? Thoughts? ? Thanks! Jeff KC8VFN
Jeff Acree All Messages By This Member #214479 Regarding the height:? The cans are 8 inches in diameter, and they are 21" tall.? The stated height does not include the tuning rods and other projections. ? Regarding the range: I do not know what frequency range (A, B or C) these were designed for.? They are currently tuned to TX=147.360 and RX=147.960 with the performance stated in my initial post. ? If I wanted to add a can to each channel, will I need to find one pass low / block high and one pass high / block low can?? That is the case with my TXRX duplexers unless I want to change a loop.? I found a few pass low block high cans that seem to be the same as these, but none that are advertised as pass high / block low. ? Thanks! Jeff

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