[Repeater-Builder] Re: Decibel Z-Matcher Replacement Feed-Thru?

[k7icu]

OK, here's the verdict (since several have asked):

The best match I could find was a Tucsonix 2443-007-X5S0-102MLF 1000pF
feed-thru capacitor.  It's nearly identical in length and width and even
has the same 1/4"-28 threads as the original part.

Here's the datasheet:
http://tusonix.com/data/search/2443-007-X5S0-102M.pdf
<http://tusonix.com/data/search/2443-007-X5S0-102M.pdf>

It's available from Digikey as P/N 410-1039-ND: 
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=410-103\
9-ND
<http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=410-10\
39-ND>

While you're there, if your unit has UHF connectors installed, they
stock N type replacements:

Amphenol Connex 172118 (N Male):   
<http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search\
_go&keywords=%09ACX1166-ND>
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ACX1166\
-ND
<http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ACX116\
6-ND>

Amphenol Connex 172119 (N Female): 
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ACX1167\
-ND
<http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ACX116\
7-ND>

James K7ICU

[Repeater-Builder] Decibel Z-Matcher Replacement Feed-Thru?

[k7icu]

I have a sick Decibel DB4330 Z-Matcher with a crushed and mangled
feed-thru "capacitor" (looks more like a ceramic non-capacitor feed-thru
to me). Anyone know if the original feed-thru part is still available
out there?   Rough details: 10-32 x 3/8" body; 1" long 15 AWG wire ;
ceramic insulator; 0.22" mounting hole; 5/16" flat hex-shaped outside
end and a 10-32 nut inside the box.

James K7ICU

[Repeater-Builder] Re: Heliax / Connectors

[k7icu]

--- In Repeater-Builder@yahoogroups.com, n...@... wrote:
>
> Aluminum hardline was once bad at one mountaintop site I rent from.
>
> Bob NO6B

One possible reason:

"Generation of Passive Intermodulation Products (PIM)

Gold, silver, copper, brass and copper-beryllium joints generate low
PIM; steel, aluminium, stainless-steel-joints generate higher PIM."

Source: 
http://www.hubersuhner.com/products/hs-p-rf/hs-p-rf-info/hs-p-rf-info-pi\
m
<http://www.hubersuhner.com/products/hs-p-rf/hs-p-rf-info/hs-p-rf-info-p\
im>

James K7ICU