Hello,

I need a Murata CFJ455 K12 or CFJ455 K5 ceramic filter. These are
455khz filters you would pull out of a transeiver to upgrade filters
such as with Inrad filters etc.

Thanks,

Rick KC0HH

"KC0HH" wrote in message
...
Hello,

I need a Murata CFJ455 K12 or CFJ455 K5 ceramic filter. These are
455khz filters you would pull out of a transeiver to upgrade filters
such as with Inrad filters etc.

Thanks,

Rick KC0HH


Rick -

The Yaesu FT-817 and Icom IC-703 use the MuRata CFJ455K ceramic filter. So
a Collins mechanical or Inrad upgrade like shown at W4RT would qualify
http://www.w4rt.com/obf/OBF_IC-703_Manual.pdf

w9gb

On Thu, 12 May 2005 16:05:34 -0500, "gb"
wrote:

Thanks,
I looked at that. It is the CFJ455K 15... The K12 and K5 need to
see a 2k input and output. I am not sure what the K15 filter uses. I
am trying to resurrect a TS-830S. I received it sans any filters.
These are the stock 455 filters. I need to get a filter in there to
see if it still works. I really did not want to sink a bunch of cash
in a Collins or Inrad filter and then find out the radio is not
worth fixing.

Rick KC0HH

"KC0HH" wrote in message
.. .
Hello,

I need a Murata CFJ455 K12 or CFJ455 K5 ceramic filter. These are
455khz filters you would pull out of a transeiver to upgrade filters
such as with Inrad filters etc.

Thanks,

Rick KC0HH


Rick -

The Yaesu FT-817 and Icom IC-703 use the MuRata CFJ455K ceramic filter. So
a Collins mechanical or Inrad upgrade like shown at W4RT would qualify
http://www.w4rt.com/obf/OBF_IC-703_Manual.pdf

w9gb

KC0HH wrote:
On Thu, 12 May 2005 16:05:34 -0500, "gb"
wrote:

Thanks,
I looked at that. It is the CFJ455K 15... The K12 and K5 need to
see a 2k input and output. I am not sure what the K15 filter uses. I
am trying to resurrect a TS-830S. I received it sans any filters.
These are the stock 455 filters. I need to get a filter in there to
see if it still works. I really did not want to sink a bunch of cash
in a Collins or Inrad filter and then find out the radio is not
worth fixing.

If you can cobble a way to patch in the Murata CSBLA455KEC8-B0, just
to see if the rest of the radio works, Digikey sells them for less
than a dollar.

The specs are on page 41 of this catalog:
http://www.murata.com/catalog/p17e14.pdf

On Thu, 12 May 2005 18:34:49 -0400, John Popelish
wrote:

Hi,

Thanks for the info. The problem with these 455 ceramic filters is
that they are also in the Kenwood's transmit chain. If I was just
dealing with a receiver, it would be much easier to do. For receive
only I could just solder a 20pf capacitor across where the filter goes
to test things.


If you can cobble a way to patch in the Murata CSBLA455KEC8-B0, just
to see if the rest of the radio works, Digikey sells them for less
than a dollar.

The specs are on page 41 of this catalog:
http://www.murata.com/catalog/p17e14.pdf

KC0HH ) writes:
On Thu, 12 May 2005 18:34:49 -0400, John Popelish
wrote:

Hi,

Thanks for the info. The problem with these 455 ceramic filters is
that they are also in the Kenwood's transmit chain. If I was just
dealing with a receiver, it would be much easier to do. For receive
only I could just solder a 20pf capacitor across where the filter goes
to test things.

But that will work on transmit, too. The only difference is that
you will have a DSB signal rather than an SSB signal.

If you can hear things, and you can transmit a signal, surely
the rig is in good enough state to warrant tracking down a suitable
filter.

Michael VE2BVW


If you can cobble a way to patch in the Murata CSBLA455KEC8-B0, just
to see if the rest of the radio works, Digikey sells them for less
than a dollar.

The specs are on page 41 of this catalog:
http://www.murata.com/catalog/p17e14.pdf

"KC0HH" wrote in message
...
On Thu, 12 May 2005 16:05:34 -0500, "gb"
wrote:

Thanks,
I looked at that. It is the CFJ455K 15... The K12 and K5 need to
see a 2k input and output. I am not sure what the K15 filter uses. I
am trying to resurrect a TS-830S. I received it sans any filters.
These are the stock 455 filters. I need to get a filter in there to
see if it still works. I really did not want to sink a bunch of cash
in a Collins or Inrad filter and then find out the radio is not
worth fixing.

Rick KC0HH

Rick -

The Yaesu FT-817 and Icom IC-703 use the MuRata CFJ455K ceramic filter.
So
a Collins mechanical or Inrad upgrade like shown at W4RT would qualify
http://www.w4rt.com/obf/OBF_IC-703_Manual.pdf

w9gb


Unless it is an ugly duckling .. TS-830 repair should be straight forward

I think most of the Murata filters are either 1.5K or 2K input and output

In the second RX of the Yaesu FT-1000(D) and the FT-1000MP you will find a
Murata 455 kHz ceramic filter.
This will be the Murata CFJ455K '15', '13' or '5' filter.
http://www.remeeus.nl/english/hamrad...xfiltering.htm

gb

On Thu, 12 May 2005 18:47:37 -0500, "gb"
wrote:

This 830S is evidently a European model. There is a 12 pin
cinch-jones type plug for power and it is badged for 220/240 and
13.8vdc. Whoever had it here in the states had the primary jumpered
wrong and it wouldn't have worked on any power mains - 110 or 220v.
I received it without any tubes, all the filters have been removed
and some wire harnesses cut up. I don't know what else has been
messed with. Spliced the wires. replaced the tubes and HV is ~850v and
I can set the idle at 60ma but I want to get some filters in there to
able to test it. Any of the CFJ455K filters would be nice to find.

Rick



Unless it is an ugly duckling .. TS-830 repair should be straight forward

I think most of the Murata filters are either 1.5K or 2K input and output

In the second RX of the Yaesu FT-1000(D) and the FT-1000MP you will find a
Murata 455 kHz ceramic filter.
This will be the Murata CFJ455K '15', '13' or '5' filter.
http://www.remeeus.nl/english/hamrad...xfiltering.htm

gb