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Post by willymotts on Apr 18, 2021 12:22:42 GMT
If that button interrupts the ground side, I will look for some ground contact that shouldn't be there...
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Post by Ron Rich on Apr 18, 2021 12:26:12 GMT
OK-- If "instant", that proves it's not mechanical as described in the FAQ's section-- look at the switch itself-- is it stuck closed , or not being actuated by the button ? Ron Rich
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Post by willymotts on Apr 18, 2021 12:37:37 GMT
It's a sliding switch where you can see the contacts engaging and disengaging when you press or release the button. It appears to be operating correctly which leads me to suspect some other form of grounding... Thanks.
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Post by Ron Rich on Apr 18, 2021 12:52:36 GMT
One should not, in my opinion, rely on "appearance" to check switches ! See the FAQ's posts-- Ron Rich
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Post by willymotts on Apr 18, 2021 12:59:41 GMT
Holy crap, I took it out, cleaned it, metered it for continuity and reinstalled it.
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Post by Ron Rich on Apr 18, 2021 13:02:21 GMT
Izit working now  Ron Rich |
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Post by willymotts on Apr 18, 2021 13:24:54 GMT
No. Going out to work on it some more. All that was done before I mentioned it as non-working.
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Post by willymotts on Apr 19, 2021 20:15:19 GMT
Now, to find a cap kit... Thanks to all for the help!
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Post by Ron Rich on Apr 19, 2021 22:00:42 GMT
Didja fix it ?--What wazit Ron Rich |
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Post by willymotts on Apr 19, 2021 22:56:10 GMT
The contacts on the write-in relay. Thank you for the help. Now to find some caps!
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Post by willymotts on Apr 21, 2021 21:32:34 GMT
Just made six different orders to get some caps. I might as well replace the power transistors while I'm at it but I am having trouble finding an equivalent listing for: GM 6923 for this Rock Ola 440. Any help?
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Post by jukenorman on Apr 22, 2021 8:28:32 GMT
Hi,
I'm not clear why you want to replace the output transistors if they are still functional? These transistors are germanium. There is a thread from June 2020 where somebody was replacing these with 2N3791, changing some resistors and re-biasing (on a 448). He said he would tell us how it went - he never did, so presumably it went OK!
Norman.
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Post by willymotts on Apr 22, 2021 9:47:29 GMT
Good point. I have decided against it. Thanks for the input. The more I learn, the happier I am!
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Ron Rich