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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,

And I'm getting 80db of notches wrote:

Yes those are decibel DB4060s.. are they B range? I have a set on a Quantar that works just perfect.. Chris WB5ITT [email protected]> wrote:

this auction indicates it's UHF but not sure which range - https://www.ebay.com/itm/146409779825 [email protected]> wrote:

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

Chris, you are welcome to email me for details. -- - Regards, Karl Shoemaker To contact me, please visit SRG's web site at http://www.srgclub.org for the current email address.

Looking at spare module for the mtr2000 and came across this module and I have no idea what band it is for.

4062 is 6 cavities. 4060 is 4 cavities. Is the height 34.5 inches? 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

I recently had the need to do some research on Helper Instruments and locate a schematic. I ended up overhauling the page at Repeater-Builder. Does anyone know what Bill Detweiler's ham callsign

The front end helicals need to be retuned for below 450 MHz receive. Something like a 10MHz spread if you tune for flat top response as Kenwood suggests in the manual (see the R-B archived TK890(H)

Hmmmm… sound more like an alignment than a ‘tweak’. Mike WM4B Sent: Wednesday, April 9, 2025 5:03 PM To: [email protected] Subject: Re: [repeater-builder] UHF mobiles

https://w6dtw.blogspot.com/2013/05/tk-890-amateur-radio-mod.html?m=1 [email protected]> wrote:

In what way does the TK-890’s need tweaking?? Sent: Tuesday, April 8, 2025 6:37 PM To: [email protected] Subject: Re: [repeater-builder] UHF mobiles This Message is From an External

Such a device exists.? Its commonly referred to as a Thumper. Basically it is a high voltage pulse that causes the fault to break down.? I rented one on 2 occasions to locate a underground fault in

John – can you elaborate? Sent: Tuesday, April 8, 2025 9:37 PM To: [email protected] Subject: Re: [repeater-builder] UHF mobiles TK-890's aren't bad, but some need slight

I did the same with great success. Also added a ~2" muffin fan to the additional tx deck heatsink. Been working well through thousands of daily nets for close to 10 years. Ross kc7rjk

TK-890's aren't bad, but some need slight tweaking [email protected]> wrote: -- John Kreno The line separating good and evil passes not through states, nor between classes, nor between political

For anyone not reading our original post a little background. The repeater-builder article on the TK690H mentioned that the black KMC35 mic gave better sounding audio than the OEM grey KMC27 mic

I have a Harris XG-75M that does 440-512 stock. Got it off eBay for about $175. Excellent radio with lots of features.