Does anyone know where I can find spec on this kenwood yg-455cn-1
filter.

wrote:

Does anyone know where I can find spec on this kenwood yg-455cn-1
filter.

YG-455CN-1 CW FILTER
Center frequency: 455.0 kHz
Pass band width: 250 Hz (-6 dB)
Attenuation band width: 480 Hz (-60 dB)
Guaranteed attenuation: More than 80 dB

dxAce
Michigan
USA

I should have been more specific. I need the pinouts. I was hoping to
find a datasheet. I'm not going to use the filter in a Kenwood radio.
Basically, it's a flea market find.

BTW, thanks for the quick reply.

wrote:

I should have been more specific. I need the pinouts. I was hoping to
find a datasheet. I'm not going to use the filter in a Kenwood radio.
Basically, it's a flea market find.

Do a search for International Radio or InRad. They might be able to help you
out.

dxAce
Michigan
USA

wrote:

Does anyone know where I can find spec on this kenwood yg-455cn-1
filter.

A quick Google search says it's a 250hz cw filter for radios with a 455khz IF.

I didn't see any an indication of if it's a crystal or mechanical filter, or
what the shape factor should be.

It is a crystal filter. That is marked on the case. I picked one up at
the local flea market, but need to figure out if it is useable in my
radio.

There are 5 pins per side. The ground and signal lines are obvious, but
that's about it.

It helps in the sense that I now know the impedance is 2000 ohms,
assuming the InRad filters are the same impedance as the other
kenwoods. With equal impedances (sort of what I expected), I assume
that input and output can be interchanged..
http://www.qth.com/inrad/home.htm

Mine has two sockets on the PCB. The ground pins are easy to spot
since they go the ground plane, and the signal pins have a fat trace
that I assume is designed to have a certain impedance.

The two remaining pins on each side are a bit of a mystery. One pin on
each side goes to a loading cap (i.e .two caps, one for each pin). The
loading caps are already connected to the ground plane.

I think I have enough info to test the filter prior to opening up the
radio. Wouldn't you know my RF generator doesn't go beneath 1Mhz (I
need a different plug in) and my other function generator that would
conver the range has the sine wave output blown. I'm going to pad down
and cap couple the square wave output, which should be good enough for
a quick visual test.

The AR7030 has a very fine step size of 2.655Hz, though it doesn't
display that fine a step.