maybe the masonite board is the secret behind the Silver tone
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Silvertone 1484 Twin Twelve
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Originally posted by mozz View PostDo you make him a offer on the 58' LP?
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Originally posted by soundmasterg View PostYou will need to come up with a mod to replace the can cap as they are not available anymore in those values, so you can cut a bigger hole and put in a dual cap, then add others under the chassis with terminal strips, or you can leave the stock can in place but disconnect it electrically and use discrete caps in the chassis with terminal strips.
Greg
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Originally posted by tigerzilly View PostIt was free! Now I have a Silvertone 1484 Twin Twelve amp.
https://www.silvertoneworld.net/ampl...schematic.html
All for free ! that would make me happy for several months, perhaps a year !Last edited by HaroldBrooks; 11-01-2019, 04:08 AM." Things change, not always for the better. " - Leo_Gnardo
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Originally posted by tigerzilly View PostThat's where I'm at now. Seems like it's always a problem replacing the can caps. There isn't much room in the chassis to bring all the caps to the underside.
https://www.youtube.com/watch?v=gkZYkSLEit0
https://www.youtube.com/watch?v=MBSYCaosk_k
Also, I've found some the caps from China are small for the microfarad capacitance. A 20uf Atom is 3 times the size of a Chinese cap. I'm sure the Atom is a better cap, but If you use the amp and keep your eye on it, I'm also sure the Chinese caps will last a decade. The big thing is using the amp periodically, and keeping A/C off the caps. Since I believe this amp has a diode rectifier, there's less chance of a short that would blow up caps.Last edited by HaroldBrooks; 11-01-2019, 04:15 AM." Things change, not always for the better. " - Leo_Gnardo
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Originally posted by HaroldBrooks View PostI've never done it, but you could "Gut" the can cap and put smaller modern ones in place. It's been done by many, and it doesn't have to look perfect from the underside, IMHO.
https://www.youtube.com/watch?v=gkZYkSLEit0
https://www.youtube.com/watch?v=MBSYCaosk_k
Also, I've found some the caps from China are small for the microfarad capacitance. A 20uf Atom is 3 times the size of a Chinese cap. I'm sure the Atom is a better cap, but If you use the amp and keep your eye on it, I'm also sure the Chinese caps will last a decade. The big thing is using the amp periodically, and keeping A/C off the caps. Since I believe this amp has a diode rectifier, there's less chance of a short that would blow up caps.
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Also, I've found some the caps from China are small for the microfarad capacitance. A 20uf Atom is 3 times the size of a Chinese cap. I'm sure the Atom is a better cap, but If you use the amp and keep your eye on it, I'm also sure the Chinese caps will last a decade.
The ecap technology of Sprague (Atoms) and ILC must be considered inferior and outdated by today's standards.- Own Opinions Only -
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Originally posted by Helmholtz View PostNot sure which chinese brands you mean. But for decades the best, most advanced ecap technology has been coming from Japan (no matter where the production sites actually are), think Rubicon, Chemicon, Nichicon, Matsushita/Panasonic etc. as well as Europe (Evox/Rifa, Philips/BC now Vishay, Siemens/Epcos).
The ecap technology of Sprague (Atoms) and ILC must be considered inferior and outdated by today's standards.
I am pretty sure the speaker cabinet is particle board all around. The head box is too, though that isn't under any strain. The 1484 that I have currently is stock bit I never had a speaker cabinet for it....just the head. My brother's that I modded the piss out of is the same deal, and we ended up making a new head box for his and adding a Fender reverb circuit to it among many other changes. I made the thing sound really good but I hate working on it due to the lack of space and poor layout. BTW, these amps were only ever about 25 watts RMS. With the small original output transformer and some mods to the screen supply you can get it up to 30-35 watts RMS and that is about it.
@Haroldbrooks - this amp does use solid state diodes in the power supply. It has two half wave two diode doublers stacked on top of each other for a total of 4 solid state diodes, four caps, and somewhat poor regulation, so it sort of emulates the sag of a tube rectifier.
Also, there are two errors on the schematic. It shows a ground between R35 and R36 that should not be there, and on the trem tube it has pins 6 and 8 reversed on the schematic....or at least the numbers are reversed from where they actually are.
Greg
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