[Milsurplus] [MRCA] Video of FR-38B/U

[MICHAEL ST ANGELO]

Ray,


That was a real labor of love. Enjoyed it.


Mike N2MS

 

> On December 6, 2017 at 10:39 AM Ray Fantini <RAFANTINI at salisbury.edu> wrote:
> 
> 
>     Did a video of the FR-38B/U Digital Frequency counter yesterday and just put it up on YouTube at:
> 
>      
> 
>     https://www.youtube.com/watch?v=3ka1wwvex5o
> 
>      
> 
>     Just about all the issues have been resolved, got all the time base chains working. The gates working at the proper time and most of the bugs worked out. Still have some jumps up and down in frequency but attribute this to poor performance to many of the diodes that have not aged well in the dividers. Did replace a couple of the worst offenders in the gate trigger MMV but think an entire new set would be in order being noticed that after the counter has been on for several hours and gets real hot instability increases. Also have one bad neon bulb in one of the decade counters and will have to find a replacement for that. And if all that’s not enough found that the little temperature gauge for the crystal oven has died and short of finding another unit as a parts donor don’t expect to find one of them.
> 
>     Been a fun project, don’t know what’s next on the list.
> 
>      
> 
>     Ray F/KA3EKH
> 


 

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