Everything is operational but there are somethings I would like to change or enhance:
1) On the SWR meter there was no spec on the meters as far as current range goes, so I picked a 1ma meter. Turns out I could have picked a higher current meter. I think I will put two series resister in the meter circuit to increase sensitivity. Also the silk screen does not seem to match the functionality Not a big deal I just switch the input and output.
2) I installed the bandwidth pot on the NEScaf upside down. That could be easy to fix if I wanted to.
3) Box is a little big but I needed something that was wide enough to fit ever thing. I guess the NEScaf controls could have been mounted vertically and save 2 1/2 inches of width.
4) freq counter has a hard time with the 21 mHz signal. I have ordered a RF amp to boast the signal. Also I was thinking of adding a counter input so I can use it for other things. What do you think?
|Completed SWR/audio filter/freq counter|
|Inside view. As you can see plenty of room, SWR on left, audio filter center and freq counter right|
|Close up of front panel. As you can metal work was not very good.|