Decibel DB4060 Series Duplexers
What would be required to change a DB4060 series can that is currently set up for pass low / block high to pass high / block low?? If loop replacement is required, where can they be procured?
?
Thanks!
Jeff KC8VFN
|
Re: In search of dB4060 -005 coupling loops or assemblies
Wouldn't even risk that guy. I sent him a set of cans 4 years ago and he straight up disappeared after he told me to ship them to him. Tried every form of contact known to man and never got a response. I'd still like my cans back. Thief.
|
Tait TB8100 CWID Configuration
I've got a TB8100 in GMRS service.? I want to of course provide proper ID, but as I share the channel with another system, I do not want the ID to beacon, just politely properly ID routinely after use of the system.
In the CWID System tab, pretty sure I do not want Automatic CWID checked - but ID after some period of local system use would be done via a Task Manager configuration?
Examples, screen shots welcome.
|
Re: In search of dB4060 -005 coupling loops or assemblies
Is this them??
Duplexer Repair is a service division of?. Duplexer Repair performs repairs, refurbishing, and tuning of a wide variety of duplexers and cavity filters. From small UHF duplexers to large HF cavities. We also offer on-site tuning of duplexers and filters within a reasonable travel distance on a per job basis — call us at?(334) 787-9005?to discuss on-site work, or drop us an email at?service@....
Kory
toggle quoted message
Show quoted text
On 2025-04-10 13:41, Gerald Lucha via groups.io wrote:
Kevin has given me a lot of help tuning the overpainted and unknown
dB4060 diplexer.? It is smelling a lot like they are not the ham band
model.? If anyone has up to date contact info on the firm called duplexerrepair.com I would greatly appreciate it.? If anyone has
extra -005 coupling assemblies, please let me know, off list.
Jerry W6OJE? gvlucha@...
|
In search of dB4060 -005 coupling loops or assemblies
Kevin has given me a lot of help
tuning the overpainted and unknown
dB4060 diplexer.? It is smelling a lot like they are not the ham
band
model.? If anyone has up to date contact info on the firm called
duplexerrepair.com I would greatly appreciate it.? If anyone has
extra -005 coupling assemblies, please let me know, off list.
Jerry W6OJE? gvlucha@...
|
Re: Duplexer for amateur 70-cm band
I agree.? They are false economy.? The only protection that they give the receiver from transmitter power is a very sharp notch.? Burn up the teflon, loose the notch tuning, and you have the chance of the up to 50 watts getting back into your receiver.
toggle quoted message
Show quoted text
On 4/10/2025 10:38 AM, Harold Farrenkopf via groups.io wrote: Mobile compact duplexers are for low power use at best. ?They burn up if used for continuous repeater transmission and high power. ?I’ve seen 50 watts burn up the teflon end dielectric tuning screw supports.
|
Re: VHF Duplexer Identification
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
|
Re: Duplexer for amateur 70-cm band
Mobile compact duplexers are for low power use at best. ?They burn up if used for continuous repeater transmission and high power. ?I’ve seen 50 watts burn up the teflon end dielectric tuning screw supports.?
|
Re: Cellwave 526-4-2 harness specs
Butchered and jackass….. ?NO.?
it looks like they had made a 6 cavity preselector using the 6 pass/reject cans in series with notches on both sides of the pass frequency. ?This is one way of making a narrow passband with low loss and large attenuations close in. ?
If these loops were rotatable Q loops like used in the Sinclair Q duplexers, you can do wonders in shape and customization of the pass and reject curves.?
|
Re: Cellwave 526-4-2 harness specs
?Looks like you just need a N type T connector and one length of jumper
On Thursday, April 10, 2025, 9:37 AM, Part 15 Engineer via groups.io <kc8gpd@...> wrote: Thank you,
You just saved me a major headache.
Robert - I have a cellwave 526-4-2 here and I'm attaching a picture that basically shows the issue. I need to make a whole new harness for it including antenna port harness.
? RG214.? Between cavities – 11.5”.? To antenna tee – 12.0”.? Those are tip-to-tip lengths for 440-470 MHz range. ? ??????????????????????????????????????????????????????????????????????????????? --- Jeff WN3A ?
|
Re: Cellwave 526-4-2 harness specs
Thank you,
You just saved me a major headache.
Robert
- I have a cellwave 526-4-2 here and I'm attaching a picture that basically shows the issue. I need to make a whole new harness for it including antenna port harness.
? RG214.? Between cavities – 11.5”.? To antenna tee – 12.0”.? Those are tip-to-tip lengths for 440-470 MHz range. ? ??????????????????????????????????????????????????????????????????????????????? --- Jeff WN3A ?
|
Re: Cellwave 526-4-2 harness specs
- I have a cellwave 526-4-2 here and I'm attaching a picture that basically shows the issue. I need to make a whole new harness for it including antenna port harness.
? RG214.? Between cavities – 11.5”.? To antenna tee – 12.0”.? Those are tip-to-tip lengths for 440-470 MHz range. ? ??????????????????????????????????????????????????????????????????????????????? --- Jeff WN3A ?
|
Cellwave 526-4-2 harness specs
I have a cellwave 526-4-2 here and I'm attaching a picture that basically shows the issue. I need to make a whole new harness for it including antenna port harness.
Can someone point?me in the right direction for harness specs, cable type and length for 440-470 mhz?
I need to make the antenna port jumper harness as well as the individual cavity harnesses.
Idk what the jackass before me was doing but they butchered the harness.
Thanks
Robert 
|
Re: Duplexer for amateur 70-cm band
Search for a Motorola T1504. These are plentiful, and should be in the under $200 price range. They are a true BpBr duplexer, and are great performers. Lots of info on line regarding configuration, tuning, etc.
73,
Kevin, K9HX
On Thu, Apr 10, 2025 at 12:41?AM Karl Shoemaker via <srg734= [email protected]> wrote: Chris, you are welcome to email me for details.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
|
Re: VHF Duplexer Identification
And I'm getting 80db of notches
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? ? ? 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?
|
Re: VHF Duplexer Identification
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? ? ? 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?
|
Re: Identify his module because I can’t.
this auction indicates it's UHF but not sure which range -?
Looking at spare module for the mtr2000 and came across this module and I have no idea what band it is for. 
|
Re: Varden duplexer model# 8D1146B
Tom, are they the green or blue cans, about 4" in diameter and sixe to eight cans? I used to own that duplexer, if it's the one I'm thinking of that's band-reject only.? Details on the web site.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
|
Re: Duplexer for amateur 70-cm band
Chris, you are welcome to email me for details.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
|
Identify his module because I can’t.
Looking at spare module for the mtr2000 and came across this module and I have no idea what band it is for. 
|
Jared Smudde
Chris Boone WB5ITT
Joe N8CN
Karl Shoemaker