[Milsurplus] Video of FR-38B/U

[Kenneth G. Gordon]

On 6 Dec 2017 at 15:39, Ray Fantini 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

Nice, Ray. Fun video. Thanks.

>     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.

So what diodes did you end up using, Ray?

> Also have one bad neon bulb in one of 
>     the decade counters and will have to find a replacement for that.

I have seen those small wire-leaded neons on Mouser, Ray.

> 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.

Ha! As someone else mentioned, that LOOKS exactly like the small meat thermometer my 
Wife uses in the kitchen. :-)

>     Been a fun project, don´t know what´s next on the list.

Got any big, WWII Navy transmitters, maybe? 

Ken W7EKB

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