[URGENT HELP] Repair or replace broken potentiometer? - Page 1
Forum section: electronics / repair

author: romhunter
author_rank: Regular Contributor
timestamp: June 24, 2017, 05:31:22 pm
content: Long story short, my cat broke my RF transceiver's switch (and volume), so now I'm stuck with either option to repait it or to replace it. I can't find any info on it for half a day. Transceiver model is Kenwood TK-720 (image bellow). Included a few shot of how broken it is. And I think the 2 taper is somehow reverse in resistance. I mean it wire up the same way (look at the PCB) but measuring them resulting in 2 different result (1 is almost 10k and the other is around 40k)

author: romhunter
author_rank: Regular Contributor
timestamp: June 24, 2017, 05:35:53 pm
content: More images

author: romhunter
author_rank: Regular Contributor
timestamp: June 25, 2017, 08:00:03 am
content: So far no replacement have been found. So my only option is to repair it. Superglue doesn't stick well enough. Any suggestion?? I've literally scratching my head trying to repair it for days

author: HighVoltage
author_rank: Super Contributor
timestamp: June 25, 2017, 08:22:49 am
content: This is easy to fix, I have done similar repairs many timesDrill a center hole in both shafts to insert a steel rod of like 3 mm diameter, and then glue the parts together with a metal glue.This will hold better than new.Or, if you don't trust the rod and glue, drill a hole and insert a screw.

author: romhunter
author_rank: Regular Contributor
timestamp: June 25, 2017, 03:32:53 pm
content: Quote from: HighVoltage on June 25, 2017, 08:22:49 amThanks, I'll give it a go and see

author: WastelandTek
author_rank: Frequent Contributor
timestamp: June 25, 2017, 07:10:51 pm
content: your cat

author: carl_lab
author_rank: Frequent Contributor
timestamp: June 25, 2017, 09:38:57 pm
content: Quote from: WastelandTek on June 25, 2017, 07:10:51 pm

author: edpalmer42
author_rank: Super Contributor
timestamp: June 25, 2017, 11:01:40 pm
content: Ok kitty! Feel free to break anything you want - except me!I had to replace a shaft on an optical encoder. The original was missing so I replaced it with an aluminum rod the same diameter. I used sort of a mortise and tenon joint between the two pieces. Then I glued them together with JB Weld. Then, just to over-engineer it, I put a steel pin through the joint!It's hard to tell the difference between the repaired one and a second identical one on the same piece of equipment. They feel the same.Ed

author: Nusa
author_rank: Super Contributor
timestamp: June 26, 2017, 12:50:07 am
content: The only way a cat could break that shaft would be to knock the whole unit on the floor. Unless the shaft was already seriously cracked before the cat got to it, of course.

author: romhunter
author_rank: Regular Contributor
timestamp: June 26, 2017, 05:51:43 am
content: Quote from: Nusa on June 26, 2017, 12:50:07 amWhich is exactly what it did. Now the radio is lying around collecting dust because I don't have the damn programmer. Useless all the same. Why do they have to make some exclusive programmer just to program EPROM and not some DOS program to make the file then burn using an EPROM programmer?