[Repeater-Builder] Re: db 4060 high band
Hi Joel, Take a look at this page. http://www.repeater-builder.com/db/db-4060-4062-repair.pdf You have the classic symptom Bernie Parker K5BP --- In Repeater-Builder@yahoogroups.com, Joel Hall [EMAIL PROTECTED] wrote: Hope some of you guys that have some experince with db 4060 duplexer,the pass is fine but the notch is the problem I can see the notch at around 35db on my ifr 1600s per each can but when i combine them together about 50db is the best i can get I have new cables made 1/4 wave long , the tuning caps seem a little flakey may have had been hit with a lightning surge. I have not taken them apart yet so any thoughts? Thanks kj4si
[Repeater-Builder] Re: db 4060 high band
Well... First: If you have the original cable set and know the frequency of design... might be prudent to replace them into service to see if you can obtain the spec'd notch value. Second: You might note the IFR 1600's generator output value and crank it up min 10dB and better yet 20 dB. Then have a second look... cheers, s. Joel Hall [EMAIL PROTECTED] wrote: Hope some of you guys that have some experince with db 4060 duplexer,the pass is fine but the notch is the problem I can see the notch at around 35db on my ifr 1600s per each can but when i combine them together about 50db is the best i can get I have new cables made 1/4 wave long , the tuning caps seem a little flakey may have had been hit with a lightning surge. I have not taken them apart yet so any thoughts? Thanks kj4si
[Repeater-Builder] Re: db 4060 high band
--- In Repeater-Builder@yahoogroups.com, skipp025 [EMAIL PROTECTED] wrote: Well... First: If you have the original cable set and know the frequency of design... might be prudent to replace them into service to see if you can obtain the spec'd notch value. I did check these on the original freq and original factory cables with same results Second: You might note the IFR 1600's generator output value and crank it up min 10dB and better yet 20 dB. Then have a second look... Did that Thanks Joel cheers, s. Joel Hall kj4si@ wrote: Hope some of you guys that have some experince with db 4060 duplexer,the pass is fine but the notch is the problem I can see the notch at around 35db on my ifr 1600s per each can but when i combine them together about 50db is the best i can get I have new cables made 1/4 wave long , the tuning caps seem a little flakey may have had been hit with a lightning surge. I have not taken them apart yet so any thoughts? Thanks kj4si
RE: [Repeater-Builder] Re: db 4060 high band
I talked to DB once about the DB 4060, and the cables are the same length for all of the DB 4060-A, B and C series duplexers. So according to DB you do not need to change the cables. I hope this helps. Butch, KE7FEL/r To: [EMAIL PROTECTED]: [EMAIL PROTECTED]: Tue, 9 Sep 2008 01:24:51 +Subject: [Repeater-Builder] Re: db 4060 high band --- In Repeater-Builder@yahoogroups.com, skipp025 [EMAIL PROTECTED] wrote: Well... First: If you have the original cable set and know the frequency of design... might be prudent to replace them into service to see if you can obtain the spec'd notch value. I did check these on the original freq and original factory cables with same results Second: You might note the IFR 1600's generator output value and crank it up min 10dB and better yet 20 dB. Then have a second look... Did that Thanks Joel cheers, s. Joel Hall kj4si@ wrote: Hope some of you guys that have some experince with db 4060 duplexer,the pass is fine but the notch is the problem I can see the notch at around 35db on my ifr 1600s per each can but when i combine them together about 50db is the best i can get I have new cables made 1/4 wave long , the tuning caps seem a little flakey may have had been hit with a lightning surge. I have not taken them apart yet so any thoughts?Thanks kj4si
