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Dynaco SCA80Q Selector Switch
Posted: November 5th, 2020, 2:54 pm
by Stuart Polansky
I am in desperate need of at least one wafer. Nearing the end of a project to refurbish one using an LM4780 chip amp in place of a failed power amp and recapped/re-resistored line/phono stage when I discovered the broken wafer.
It MAY becthe same as a PAT4. Does anyone have one or have a source for one. Ebay and Marketplace searches come up with nothing.
Thanks in advance,
Stuart
Re: Dynaco SCA80Q Selector Switch
Posted: November 5th, 2020, 3:40 pm
by SoundMods
Stuart Polansky wrote:I am in desperate need of at least one wafer. Nearing the end of a project to refurbish one using an LM4780 chip amp in place of a failed power amp and recapped/re-resistored line/phono stage when I discovered the broken wafer.
It MAY becthe same as a PAT4. Does anyone have one or have a source for one. Ebay and Marketplace searches come up with nothing.
Thanks in advance,
Stuart
Is there any chance you can repair it? Two-part epoxy can be amazing in situations like that.
Re: Dynaco SCA80Q Selector Switch
Posted: November 5th, 2020, 4:10 pm
by DaveR
I doubt if what I have is an exact replacement, but I do have a few selector switches that are new. Can you provide some details, perhaps a picture or two. I'll do the same, probably today.
Re: Dynaco SCA80Q Selector Switch
Posted: November 5th, 2020, 5:20 pm
by Stuart Polansky
After looking at my progress pictures, I see that I broke the switch. As careful as I thought I was being, the bending moment from trying to neatly remove those 10k resistors obviously broke it.
Here are pictures of the damage and a section of the wiring diagram.
Thanks again.
Re: Dynaco SCA80Q Selector Switch
Posted: November 5th, 2020, 5:25 pm
by Stuart Polansky
Another useless pic
Re: Dynaco SCA80Q Selector Switch
Posted: November 5th, 2020, 5:28 pm
by DaveR
I took a look at what I have and they are both basic selector switches so I'm afraid I'm not going to be able to help you out. Good luck.
Re: Dynaco SCA80Q Selector Switch
Posted: November 5th, 2020, 6:33 pm
by SoundMods
Stuart Polansky wrote:After looking at my progress pictures, I see that I broke the switch. As careful as I thought I was being, the bending moment from trying to neatly remove those 10k resistors obviously broke it.
Here are pictures of the damage and a section of the wiring diagram.
Thanks again.
Hey Stu! Since the break is out of the way of any electrical connections -- and at the end of the wafer right at the mechanical connections -- I think you have a shot at a successful repair. Also I recommend cleaning the silver oxide off of the electrical connections.