Тёмный

OK... Found The Problem With The 998RT 

VK6CS
Подписаться 6 тыс.
Просмотров 2,2 тыс.
50% 1

Опубликовано:

 

28 окт 2024

Поделиться:

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист
Посмотреть позже
Комментарии : 24   
@harbselectronicslab3551
@harbselectronicslab3551 7 лет назад
I wonder if they changed suppliers of the stand offs they are using on that shield......they may be a bit shorter and be letting it get closer to the PCB.......
@vk6cs456
@vk6cs456 7 лет назад
No idea mate. Unless some good reason to leave the screen extending all the way down to the board shows itself I reckon it would be easier just to make the screen shorter as I have done.
@harbselectronicslab3551
@harbselectronicslab3551 7 лет назад
Yeah its pretty sloppy of them to let that through........your way to fix it is by far the best way, but I was just wondering how a company like MJF could let such a thing through QC like that.....
@vk6cs456
@vk6cs456 7 лет назад
I can't understand why it got past the prototype stage. Someone should have picked that up before the final design got to the manufacturing stage.
@DavidGillooly
@DavidGillooly 7 лет назад
Nice trouble shooting job! MFJ should give you a big free tuner for this. I imagine they will change their manufacturing construction to will modify the metal or put some tape on the board!
@vk6cs456
@vk6cs456 7 лет назад
They sent me a replacement tuner without asking for the faulty one back. This suggests to me they are already aware of the design flaw. It would be very nice if they sent me a 269C antenna analyser as a gift though.
@robertbrown3413
@robertbrown3413 7 лет назад
Yes, very careless to have metal laying on the resist. It's possibly the fact the remote tuner is adapted from an indoor version as a "quickie" project that didn't get design reviewed.
@vk6cs456
@vk6cs456 7 лет назад
You're probably right, the circuit diagram doesn't show the internal bias T arrangement. It's the circuit of the 998, not the 998RT.
@jeffreypetchharrison4363
@jeffreypetchharrison4363 4 года назад
here we go again MFJ i.e maid from junk, may by old pharts .. jeff..
@vk6op648
@vk6op648 7 лет назад
I should really watch to the end before commenting lol
@vk6cs456
@vk6cs456 7 лет назад
I do that too... cheers Mark.
@ne2i
@ne2i 6 лет назад
that choke is different than mine. its Huge!
@happymark1805
@happymark1805 7 лет назад
Thats a huge design failure
@vk6cs456
@vk6cs456 7 лет назад
It certainly should have been picked up. It will be interesting to see if the other 998 they sent me has the same screen fitting arrangement or if they've changed it.
@happymark1805
@happymark1805 7 лет назад
yes, but with the expreriences I have with mfj in the past I bet they didnt change it.
@vidasvv
@vidasvv 7 лет назад
nice catch! 73 N8AUM
@vk6cs456
@vk6cs456 7 лет назад
Thanks Vidas.
@vk6op648
@vk6op648 7 лет назад
Silly design. Check the new tuner and protect it from the same fault
@jeromegrzelak8236
@jeromegrzelak8236 7 лет назад
ALL RIGHT KG6MN
@vk6cs456
@vk6cs456 7 лет назад
Wow, that comment's loud. Cheers Jerry.
@jeromegrzelak8236
@jeromegrzelak8236 7 лет назад
I would hope mfj would change the stand offs thus lifting the plate off the pwb good trouble shooting fbom
Далее
#214 MFJ 994BRT Automatic Antenna Tuner  HIGH SWR fixed
1:08:06
The Antique Toaster that's Better than Yours
18:28
Просмотров 2,8 млн
#254 MFJ Automatic Tuner 998 RT Fixed
36:38
Просмотров 10 тыс.
The Truth About SIM Card Cloning
13:04
Просмотров 1,1 млн
Monster magnet meets microwave magnetron...
17:44
Просмотров 48 тыс.
Crystal Radios: No Batteries? No Problem!
25:06
Просмотров 280 тыс.
MFJ-998 1.5KW Auto Tuner Calibration procedure
4:48
Просмотров 11 тыс.
Satellite Hacking Cyberdeck v2.0
17:47
Просмотров 229 тыс.
Popping a 5000A Fuse
18:42
Просмотров 6 млн