FD3785 Posted January 8, 2018 Report Share Posted January 8, 2018 Where is everyone getting their duplexers and controlers looking for cheap and good haha MattWQZT541KC3IKX Quote Link to comment Share on other sites More sharing options...
coryb27 Posted January 8, 2018 Report Share Posted January 8, 2018 Used duplexes can be found on eBay, If you want a decent system with good receiver sensitivity stay away from the mobile style flat packs and look for a good pass / reject. Logan5 1 Quote Link to comment Share on other sites More sharing options...
n4gix Posted January 8, 2018 Report Share Posted January 8, 2018 Currently there are few 'used' 70cm duplexers listed. There are several new ones but for astronomical prices! Quote Link to comment Share on other sites More sharing options...
intermod Posted January 8, 2018 Report Share Posted January 8, 2018 I second EBAY these days....limited selection however, and many look like trash. Many over-priced ones sit there month after month. I usually pay about $350 for a good Telewave or Sinclair bandpass/band-reject (BPBR) duplexer with 80-90 dB of TX to RX isolation. Most are about $1900 new. If you are not using it at a repeater site, maybe for a garage repeater, a $150 six-cavity notch-only duplexer works great. Greg Quote Link to comment Share on other sites More sharing options...
JohnE Posted January 9, 2018 Report Share Posted January 9, 2018 I have nothing against flat packs in the right environment. not something you want to use in an RF dense site but as a stand alone in the middle of nowhere your probably good.in our world at such low power a flat pack will be fine at 1.2-1.5 db insertion loss and 75dB isolation between the ports for $$ as oppose to a .5dB insertion loss and 100+dB of isolation for a TX-RX $$$$$ in the real world a 40W input will give you 28-32W out if tuned properly. now the $$$$$ unit will give you 36W.it all depends on your budget, location and expectations of the system.as to RX sensitivity that I find radio dependent, some are good some out right suck. I personally like Kenwood as their receivers will typically do .25-.27uV out of the box. I have seen them go as low as .18-20uV after a tune.just my thoughts. wqzw301 1 Quote Link to comment Share on other sites More sharing options...
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