Does anyone have the assembly instructions (file, link or just the dimensions) for the UG536B/U Straight N type plug for RG58/U cable ? My web searching efforts have yielded nothing (it's a bit obsolete). I'm trying to make up a cable for 2.3 GHz so I would like to get the dimensions right in the hope of getting a half decent match.
Steve
-- That part is an Amphenol P/N 34025-RFX. Go to: http://www.amphenolrf.com/search_2_results.asp and click on "Assembly Instructions" BTW, it doesn\'t seem to be obsolete. Click on "Distributor Inventory" for a surprise. :-)
John:
The body of the UG536B/U looks quite different from the Amphenol catalog picture and their drawing link is broken...how did you cross-reference it ?
Steve
-- Hmmm... It appears the RG536B/U is an Amphenol 34025, which has different cable prep dimensions from the 34025-RFX.
John:
Yup...now the drawing link is working for me and I found that too...rather roundabout....and not listed in the catalog section....but it got me there (and I spent a few minutes poking around that website before posting too !).
Thanks, Steve
============================= Question ; Would it be sensible to use RG58/U for 2.3 GHz sig (obviously depending on length of that type of coax) I thought teflon type coax was almost mandatory for that frequency. Just curious , wishing to learn .
Frank GM0CSZ / KN6WH
Not really, but it is what I have available at present ! Teflon vs polyethylene isn't reallly that important with regard to frequency...it is more a question of quality of the shield, I think. I suppose polyethylene insulation will tend to melt while soldering connectors so it is more likely that an impedance bump will occur due to the centre conductor being off-centre. Non-solid insulation would have less loss but this has to survive being passed through car-door seals.
It is probably a good thing these things have been discontinued, too. I found it impossible to assemble without special jigging to prevent the insulation from melting and swelling up while soldering the pin, blocking the assembly. Teflon insulation would behave better I suppose.
With one end kluged into shape with a hot knife and the other end soldered with the insulation wrapped with aluminum tape, the return loss of the cable and a good load measures around 27 dB or better (probably beyond the accuracy limits of my test setup), so they work OK regardless of the kluges.
Steve (VE3SMA)
================================ Thanks Steve for the above . Unless 50 Ohms coax is absolutely necessary , you might wish to consider 75 Ohms coax as used for domestic satellite receivers (between the rx and the converter,also called LNB=Low Noise Block,located at the dish). That type of coax is double screened with both braid + copper foil and would be superior to RG58/U coax. It is fitted with socalled F-connectors ,without having to solder since the solid copper core serves as centre pin. I have been able to purchase F to N-male adaptors and by using an additional double F-female union ,this would possibly solve your problem as well . Sat receivers normally have an input signal between 950-2150 MHz ,with the dish converter subtracting 10 GHz or about from the actual satellite signal received .
Frank GM0CSZ / KN6WH
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