Last year I decided that I wanted to learn and use CW. To that end, I enrolled and completed the CW Academy Level 1 class with the CW Ops group (http://www.cwops.org/cwacademy.html). I have 2 CW QSO’s under my belt and I need to get on the air and make some more. Ion preparation for that, I decided to get the 500Hz CW Filter to add to my FT-857D. The radio has two slots for optional filters. Looking online, it seems the filters for the FT-857D are getting harder to find. I found one on INRAD’s web site and ordered one. It came a few days later and sat on my desk for a couple days. being Saturday and getting some things done, I decided to install it. I found it’s really very easy to install this filter.
To start with, there are 7 screws that hold on the top cover of the radio. 2 on each side and 3 on the top. The labels are simply my way of remember where things go in the back of the radio while it’s in my portable rack.
After removing the cover the locations for the filters are in the back left corner, as shown in the lower left portion of the photo below.
An up close look.
The filter is pretty easy to orient. There are 3 pins on one and and 4 on the other so it’s hard to get it backwards. There was also a reminder from INRAD that the circuit board went down and the label faces up. Here is after the installation which is simply pressed in.
After the installation, I wanted to make sure it was recognized by the radio so I powered it in and looked at the filter menu option and the 500Hz filter showed up as option B.
Now all I have to do is get on the air! When I do that, I will try to remember to make a video demonstrating how the filter affects reception of CW signals.
If you have a FT-857(D) and would like a CW filter for it, you might put this project on your list. I can imagine a day when these filters are really hard to find!