Celwave 696 duplexer jumper problem

[linboogy]

Hello all

I have as Celwave 4 can band pass reject. I noticed the repeater emitting beeps because the MTR drops power down and alerts you with 2 beeps every 10 seconds during a transmission. After investigating, I found that the jumper connectors are lose and appear to have become dielectric. I also noticed the jumpers were made of RG8 with the typical N connector. I have replaced all of the jumpers with new N connectors and LMR 400. After doing this, the SWR is up to 4.xxxxx. I have matched the length of the old jumpers. 

So to summarize my questions, can I use LMR400 for jumpers? and do I need the have the duplexer tuned with the new jumpers?

Thanks

[rfmedic]

If the MTR is alerting High Swr then how is the swr after the duplexer? Do you maybe have a bad cavity or bad connector on the cavity itself somewhere? As far as the jumper replacement goes; RG-8 and LMR-400 have different velocity factors and the cavities will need to be tuned with the new jumpers in place.

 

RfMedic

[linboogy]

If the MTR is alerting High Swr then how is the swr after the duplexer? Do you maybe have a bad cavity or bad connector on the cavity itself somewhere? As far as the jumper replacement goes; RG-8 and LMR-400 have different velocity factors and the cavities will need to be tuned with the new jumpers in place.

 

RfMedic

After the duplexer is 1.2 ish. The old jumpers are very sensitive to touch I guess because of the dielectric corrosion. I will have to replace them and get it retuned with the new jumpers. The old jumpers are back on and the swr is normal again 1.4 after using some contact cleaner. The copper braid is blackened along with the N connector

[linboogy]

Just got a free Telewave TPRD-4544. The shop I took it to broke one of the ports on the Celwave. They claim it has nitrogen gas and the can is lined with milar to help with temperature adjustment. Not sure about all of that but it performs better as far as isolation