| Electronics > Repair |
| CMU200 Rx level issue / failed loop test |
| << < (11/15) > >> |
| _Wim_:
--- Quote from: Bravo on August 26, 2022, 12:44:11 pm ---I fitted the small 836Mhz filters from Arrow, part No B39841B4147U410. They work fine. --- End quote --- That good to hear. Hopefully they will keep this stock a little longer. |
| 450bush:
Dears, I replaced the 836MHz filter with the B39841B4147U410 and it worked well! My CMU200 now pass the Internal Loopback test! However, I am still getting some issues with the External loopback 1-4/3-2 that fail some frequencies on 1-4 due to a higher attenuation (just a little...) and also on 3-2 showing less attenuation. I am working on a small PCB to hold the small filters and be a drop in replacement. Kind regards, Pedro |
| DavidAzulay5000:
Hey friends i need help I need to replace on the RXTX board the Filter SAW FILTER 836.5MHZ which was destroyed At first there was corrosion I made a temporary solution of coating with copper foil That temporarily solved the problem Eventually the filter cracked I removed the filter using my hot air station of hakko fr801 I am now looking for candles to purchase a replacement filter I found it on eBay Could this be a decent replacement? B39841B4122U410 836MHz SAW Filter SMD https://www.ebay.com/itm/293876605853 Greetings David |
| _Wim_:
It will not be easy to fit that without an adaptor board, as that is a TINY component. However, with my limited RF-experience it seems to me that this would at least perform as good as B4147 part from Arrow posted above (and implemented successfully), so worth a try. Arrow has still almost 18.000 pieces of the B4147 in stock (for only 0.45€ a piece), so that might also be an option. |
| DavidAzulay5000:
I know they tiny But I ran out of options. It's the only one I found and what's in ARROW Exactly the same size 3 mm x 3 mm I have a lot of adapters I use them for V REG of linear technology They are really tiny LT3042 So at most I soldered the filter on the adapter PCB An example of adapters This is a multimeter for resistors with values of 5 milli OHM to 10 ohm that I designed And built a long time ago |
| Navigation |
| Message Index |
| Next page |
| Previous page |