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Post by Allister on Aug 7, 2020 17:29:26 GMT
I am looking at the radio and cannot see any screws or fixings that hold the body together so I am assuming it's done by internal click tabs or the like.
Before I start prising the covers apart to get to the back of the antenna socket, has any one on the board dismantled one of these radio's that could give me some pointers or tips on things to avoid ?
As all my mobile antenna's are either BNC or N type connectors, I would like to replace the PL259 socket with a BNC rather than have to put an adaptor on the existing socket.
Regards Allister
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Post by Daniel VA2DG on Aug 7, 2020 22:33:40 GMT
Hi Allister thanks for joining the Forum. On the CDR300UV the SO-239 is a regular type with large nut inside the radio. That said i just do not recommend that you open the radio to change the connector. First the BNC will be too small to fit the existing hole so it will stress the inside PC board connection. (looking for trouble) Second these compact radios are all surface mount components and you have one chance out of 2 of scraping your radio. Applying too much heat to un solder the existing connector may damage other components. Third by not having the service manual you can damage the radio before reaching the connector. Most Ham if not all, never change an RF connector unless it is damage. On mobile and base station radio they use the appropriate adapter to converter example UHF Male to BNC Fem (see Picture below) All my radio have them. On portable they use a 6 to 12" pigtail with SMA to BNC. Usually radio comes with 3 type of connectors. UHF Fem, Mini UHF Fem or N Fem. I have all 3 type of radio connectors and usually mobile the cable is terminated as Mini UHF for Motorola, and BNC or UHF. If i use a temporary radio then i use adapter. Hope this will answer your question. One of my CDR300 the fan is not working and i know the fan is good after injecting 12vdc with a needle on the red wire. So Kydera forgot to connect the FAN cable inside the radio. Even with 40 years as a radio tech at component level and being a Ham for same amount of time, i am hesitating to open the radio to reconnect the FAN. I may just cut and extend the Fan cable to the power cable.  |
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Post by Allister on Aug 7, 2020 23:33:54 GMT
Hi Daniel, all sound advice ! if it's not broken, don't fix it..... As devices get smaller the option of internal repair or modification decreases, I used to see the "No user serviceable parts inside" label as a challenge, but now it's more of a truth . A look in the parts bin turned up a problem solver right angle adaptor that will give the required cable run, so I will go with that and leave the inside of the radio a mystery :-)  |
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Post by Daniel VA2DG on Aug 9, 2020 1:37:10 GMT
Hi Allister
you have a nice right angle connector.
Will have to find one for my new car because of limited place to run cable.
My actual adapter are more than 40 years old. Got those when i was a Radio Tech in the Air Force in late 1979 i had a box load of all kind of RF adaptor SMA, BNC, N, UHF, TNC, T, Union etc. so i reuse them today.
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Deleted
Deleted Member
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Post by Deleted on Aug 15, 2020 5:37:49 GMT
What about the two screws on the top and the two screws on the botton under the orange labels?
Bruce
VK2RT
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Post by Daniel VA2DG on Aug 15, 2020 14:15:44 GMT
What about the two screws on the top and the two screws on the botton under the orange labels? Bruce VK2RT Has i said earlier i just do not recommend to open your radio you have 1 chance out of 2 to damage your radio. Without any documents showing how to open the radio i would not even try. I have worked at component level for over 45 years in the telecom industry and would not even try on this radio. I have seen FCC document on exploded view of the KD-200UV and it is a mess. |
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