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DB4060 Series Dfor a 4-cuplexer Cans

Jeff DePolo WN3A All Messages By This Member #214627 It's just a matter of retuning. There is no difference between the 2 sides except how you have it tuned. Wrong. The loops are different between high-pass and low-pass. And, the loops are different depending on bandsplit. If you don't have the right loops, or are using the loops for the wrong response (high-pass versus low-pass) you probably won't even make rated space for notch depth. If they are correct for the bandsplit and pass response you'll get 85 dB for a 4-cavity DB4060. --- Jeff WN3A
TIM HARDY All Messages By This Member #214654 Hello, I checked the loops on my 4062 cavities to verify the range of the duplexer. The HIGH pass cavities used loop "005", LOW pass used loop "004" Am I correct to assume this duplexer is a "B" range? (Factory set to 149.825) Sure hope the duplexer will be usable at 146.xxxx mHz! One more question. I lost one of the Phillip's head stainless screws that hold the loop box to the can. What size are they? Are they metric? Thank you, Tim AE7TH toggle quoted message Show quoted text On 04/18/2025 11:19 AM PDT Jeff DePolo WN3A via groups.io <jd0@...> wrote: It's just a matter of retuning. There is no difference between the 2 sides except how you have it tuned. Wrong. The loops are different between high-pass and low-pass. And, the loops are different depending on bandsplit. If you don't have the right loops, or are using the loops for the wrong response (high-pass versus low-pass) you probably won't even make rated space for notch depth. If they are correct for the bandsplit and pass response you'll get 85 dB for a 4-cavity DB4060. --- Jeff WN3A
Glenn Little All Messages By This Member #214657 The cavity will not go into the milli Hertz range. If you meant mega Hertz, please use the correct designation. As far as the screw size goes, take another one out and take it to your hardware store. They can help you. You should start a junk box of assorted hardware from disassembled equipment so you will have hardware on hand. Glenn Wb4UIV toggle quoted message Show quoted text On 4/19/2025 12:46 PM, TIM HARDY via groups.io wrote: Hello, I checked the loops on my 4062 cavities to verify the range of the duplexer. The HIGH pass cavities used loop "005", LOW pass used loop "004" Am I correct to assume this duplexer is a "B" range? (Factory set to 149.825) Sure hope the duplexer will be usable at 146.xxxx mHz! One more question. I lost one of the Phillip's head stainless screws that hold the loop box to the can. What size are they? Are they metric? Thank you, Tim AE7TH On 04/18/2025 11:19 AM PDT Jeff DePolo WN3A via groups.io <jd0@...> wrote: It's just a matter of retuning. There is no difference between the 2 sides except how you have it tuned. Wrong. The loops are different between high-pass and low-pass. And, the loops are different depending on bandsplit. If you don't have the right loops, or are using the loops for the wrong response (high-pass versus low-pass) you probably won't even make rated space for notch depth. If they are correct for the bandsplit and pass response you'll get 85 dB for a 4-cavity DB4060. --- Jeff WN3A -- ----------------------------------------------------------------------- Glenn Little ARRL Technical Specialist QCWA LM 28417 Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178 QTH: Goose Creek, SC USA (EM92xx) USSVI, FRA, NRA-LM ARRL TAPR "It is not the class of license that the Amateur holds but the class of the Amateur that holds the license"
Kevin Custer Member Profile All Messages By This Member #214659 开云体育 Tim, From the information here on the group and referencing , a factory B range 4060 or 4062 requires "004" in the Low Pass and "005" in the High Pass.? So - you should be good to go... The screws are SAE - but I don't remember the size. Kevin On 4/19/2025 12:46 PM, TIM HARDY via groups.io wrote: toggle quoted message Show quoted text Hello, I checked the loops on my 4062 cavities to verify the range of the duplexer. The HIGH pass cavities used loop "005", LOW pass used loop "004" Am I correct to assume this duplexer is a "B" range? (Factory set to 149.825) Sure hope the duplexer will be usable at 146.xxxx mHz! One more question. I lost one of the Phillip's head stainless screws that hold the loop box to the can. What size are they? Are they metric? Thank you, Tim AE7TH On 04/18/2025 11:19 AM PDT Jeff DePolo WN3A via groups.io <jd0@...> wrote: It's just a matter of retuning. There is no difference between the 2 sides except how you have it tuned. Wrong. The loops are different between high-pass and low-pass. And, the loops are different depending on bandsplit. If you don't have the right loops, or are using the loops for the wrong response (high-pass versus low-pass) you probably won't even make rated space for notch depth. If they are correct for the bandsplit and pass response you'll get 85 dB for a 4-cavity DB4060. --- Jeff WN3A
Jeff DePolo WN3A All Messages By This Member #214668 I checked the loops on my 4062 cavities to verify the range of the duplexer. The HIGH pass cavities used loop "005", LOW pass used loop "004" Am I correct to assume this duplexer is a "B" range? Yep, you're good with those loops. I'm pretty sure the screws are #6-32 x 1/4", stainless. I can measure one if you can't verify. --- Jeff WN3A
John All Messages By This Member #214669 Why not just take its mates down to the Bolt shop, while there buy a set metric thread gauges, they may even have a A4 card with all the metric threads listed, for free? Just thinking outside the square .. John VK4JKL toggle quoted message Show quoted text On 20/04/2025 10:44 am, Jeff DePolo WN3A via groups.io wrote: I checked the loops on my 4062 cavities to verify the range of the duplexer. The HIGH pass cavities used loop "005", LOW pass used loop "004" Am I correct to assume this duplexer is a "B" range? Yep, you're good with those loops. I'm pretty sure the screws are #6-32 x 1/4", stainless. I can measure one if you can't verify. --- Jeff WN3A
TIM HARDY All Messages By This Member #214671 Jeff DePolo, Right on Jeff. Screw size you supplied is correct. Happy to find that I have a "B" range DB 4062! Also a big thanks to Jeff and others who have assisted me with my questions. Happy Easter. Tim AE7TH toggle quoted message Show quoted text On 04/19/2025 5:44 PM PDT Jeff DePolo WN3A via groups.io <jd0@...> wrote: I checked the loops on my 4062 cavities to verify the range of the duplexer. The HIGH pass cavities used loop "005", LOW pass used loop "004" Am I correct to assume this duplexer is a "B" range? Yep, you're good with those loops. I'm pretty sure the screws are #6-32 x 1/4", stainless. I can measure one if you can't verify. --- Jeff WN3A

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