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Duplexers?
- Thread starter hdsae60
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Your local 2way radio shop sells them. You still to have to have a tracking generator to tune them and it is better if they are hooked to the antenna system they are to be used on. I do not trust used duplexers, hardline or antennas.
mmckenna
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Telewave Inc. has been who we've been using the last few years. You can order them tuned to match your system, but that depends on them not being beat up in shipping/install. As you'd expect, double checking them after install is a good idea.
mmckenna
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If you are just looking for a place to purchase from, why not give Tessco a try:
https://www.tessco.com/products/productHierarchy.do?subtabId=33031
Ken Arck at Arcom Controllers is a Telewave dealer. You can contact him through his web site or call him to see how he can help you.
Arcom Controllers - Duplexers, Antennas & Acc.
Arcom Controllers - Duplexers, Antennas & Acc.
kayn1n32008
ØÆSØ Say it, say 'ENCRYPTION'
Sinclair Technologies. They offer both traditional 'cans' and Resloc's 4-6 cavity.
They are usually rated for 250-300w.
kayn1n32008
ØÆSØ Say it, say 'ENCRYPTION'
No. Why do you ask? You can get BpBr from Sinclair in both the traditional style individual cans, or Sinclair also offers BpBr in their Resloc series.
Myself, I would use the Resloc's, they work very well, can offer upwards of 100db of isolation, and take up a bit less room in the rack. They can also be mounted horizontal or vertical, as the rack wings are fully adjustable.
N5TWB
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I'm the president of an amateur radio club that just bought new duplexers for a problem location where the repeater is co-located with a commercial FM station. Our engineering committee recommended Bird Technologies for the best isolation. We bought a 6-can setup for our 2-meter split and it's made a world of difference in the performance of the repeater. The isolation improvement allowed the transmitter output to be punched up without getting into the receiver. The phone number is 800-866-8979, x5062 for Andrew Johnson. Amateur discount price was $2100 plus shipping for model #28-37-11E.
I have played with most makes of filters and duplexers, and have come to this conclusion: You get what you paid for, no matter who made it.
I maintain several sites with EMR filter systems. FOUR 100w repeaters on shared antennas. Pricey, but they rock.
I maintain several sites with EMR filter systems. FOUR 100w repeaters on shared antennas. Pricey, but they rock.
12dbsinad
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I have had good luck with TXRX (Bird Technologies) brand of duplexers. I have some that are over 25 years old and they still work like day one. I have found they handle the best with high power stations compared to some other brands I have used.
Make sure you don't stop at purchasing a high quality duplexer though. How it gets installed and cabled up can make or break a system regardless of what duplexer you use. Many times I have seen a 2000+ dollar duplexer get cabled with cheap non shielded RG-58 and braided RG-8 style cable on the output.
Make sure you don't stop at purchasing a high quality duplexer though. How it gets installed and cabled up can make or break a system regardless of what duplexer you use. Many times I have seen a 2000+ dollar duplexer get cabled with cheap non shielded RG-58 and braided RG-8 style cable on the output.
Very good point..... and do not skimp on the connectors either.
At the risk of repeating myself (I'm going to anyway):
A $5,000 antenna system and a $50 radio will outperform a $50 antenna system and a $5,000 radio every time.
A $5,000 antenna system and a $50 radio will outperform a $50 antenna system and a $5,000 radio every time.
TXRX in Angola NY
+1 on the Sinclair via Tessco. You don't say if it's for VHF our UHF, but if UHF Sinclair do three different designs with different isolation specs depending on your power, tx/rx split, and space requirements. If VHF mount them vertically if possible, over 10 years or more VHF duplexers on their side will drift.
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Absolutely do not buy any duplexer made in China. I've tuned hundreds of duplexers and every Chinese one I encountered got beaten with a hammer and recycled for scrap metal when I determined that they would not tune properly and performed so badly that they were likely to damage the repeaters they were to be connected to.
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