| Electronics > Projects, Designs, and Technical Stuff |
| Usefulness of different TDR designs? |
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| rhb:
Thanks. I also queried TekScopes and it's not worth messing with a 1502. I've ordered a custom 1 MHz version of Leo Bodnar's 10 MHz square wave generator specifically for TDR with a DSO. I'll stick to that. |
| texaspyro:
--- Quote from: rhb on April 20, 2019, 12:43:37 pm ---Thanks. I also queried TekScopes and it's not worth messing with a 1502. --- End quote --- Why not? I have had over 100 of them and they seem to work quite well. |
| rhb:
Dead ones are rather unrepairable. Why have you had over 100? |
| texaspyro:
--- Quote from: rhb on April 20, 2019, 05:47:20 pm ---Dead ones are rather unrepairable. Why have you had over 100? --- End quote --- The CRT based TDR's are quite repairable, the only ones I could not fix had broken CRTs. I have a TDR fetish... :-DD Actually, at one time, I got a reputation for being able to repair them and they just wandered my way. Also bought a couple of large-ish lots of them. I still have over 50 Tek TDRs (1502, 1503, 1503A, 1503B... alas no 1502A/B's)... all calibrated and working. The 1502A/B units are VERY expensive. Apparently they are used in airplane maintenence and are the only approved device for lots of applications. |
| rhb:
Yeah, the FAA is a bit weird about airplane servicing procedures and doubtless not enthused about qualifying a new device. The HP 34401A stayed in production for many years because it was specified as a requirement for a lot of work. |
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