Discussion in 'Radio Circuits, Repair & Performance' started by N1RND, Oct 18, 2019.
Kirk Douglas had one of those....
That is some good information, I'll try the first one since it is the easiest.
Did the rattle test=OK.
The big hammer test is a last resort, hi, hi.
Can you give more details about how you managed to drop the filter on concrete ?
I think that would be a good lesson for us, On what not to do.
"Golf words" are ALWAYS four letters, but may contain multiple iterations.
I violated my own golden rule, never handle parts close to the edge of the work bench.
Ever notice if you drop a tiny or one of a kind fastener on the cellar floor by your feet it will usually go under the bench 8 out of 10 times. Instead of the middle of the floor where you can easily find it.
Thanks for the Update / Warning.
You need a ESD mat at your workbench for protection.
Stuff will bounce around on a good ESD mat.
Typically two of them? No, more like 6 or 8.
1950s-60s lattice filters used 4 to 6 crystals. Since then, the trend has been to 6 or 8 crystal filters. Also ladder filters rather than lattice filters.
Old trick here if you want a benchtop that's no-bounce AND ESD protected. My bench is covered with indoor outdoor carpet, which I give a good spritzing with Downey Fabric Softener, which is anti static. You DO have to re-apply every morning though. Very effective....and measurable.
Are they really ladder designs now? I did not realize that. The ladder design originally allowed you to use cheap CB crystals, all on the same frequency. I guess it worked better than I thought.
Yup. My Tentec has ladder filters. It's almost 40 yrs old. I know they're ladders, because they're not in a shield can.