|
Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
|
Thread Tools |
18th Apr 2018, 9:29 am | #1 |
Rest in Peace
Join Date: Mar 2006
Location: N.W. Oxfordshire(Chipping Norton)
Posts: 7,306
|
Differences between 4Mhz Ceramic Filters?
This may be a silly question, but I've just ordered some 4Mhz 3-terminal Filters from an eBay seller to replace a suspect one in a Pioneer remote control. The ones being supplied are Brown, whereas that in the control is Blue, and marked 4.00 M J (The 'M' is in a circle ) Is there any significant difference between the outwardly similar - apart from the color - filters?
|
18th Apr 2018, 9:39 am | #2 |
Dekatron
Join Date: Aug 2013
Location: Wigan, Greater Manchester, UK.
Posts: 9,427
|
Re: Differences between 4Mhz Ceramic Filters?
I think they are batch selected and the same colour will have the same response, of course different manufacturers may use different colours.
So in a 4 MHz filter you would use all the same colours.
__________________
Frank |
18th Apr 2018, 10:45 am | #3 |
Rest in Peace
Join Date: Mar 2006
Location: N.W. Oxfordshire(Chipping Norton)
Posts: 7,306
|
Re: Differences between 4Mhz Ceramic Filters?
There is only one 4Mhz filter in the remote control (a Pioneer CU-VSX140, b.t.w.) so I shall await the replacement filters and see what happens. At £2 for 5, they'll hardly break the bank if incorrect, whilst a replacement control is about £150 from Donberg!!
|
18th Apr 2018, 11:37 am | #4 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,801
|
Re: Differences between 4Mhz Ceramic Filters?
M for Murata most likely
David
__________________
Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
18th Apr 2018, 2:15 pm | #5 |
Octode
Join Date: Dec 2017
Location: Morden, Surrey, UK.
Posts: 1,552
|
Re: Differences between 4Mhz Ceramic Filters?
Experience suggests that most "totally dead" problems with remotes are microscopic track breaks, often near the battery connectors.
|
18th Apr 2018, 9:38 pm | #6 |
Rest in Peace
Join Date: Feb 2004
Location: Hexham, Northumberland, UK.
Posts: 2,234
|
Re: Differences between 4Mhz Ceramic Filters?
Also the infra red LED sometimes has dry joints where it connects to the PCB, due to flexing I presume. That's if your remote is an infra red one of course.
Alan. |