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I still haul around an old Polytone MiniBrute II to all my gigs. Because the amp is so old I keep another one just like it in the trunk of the car as a back up.
Occasionally, I look over at the amp on stage and tell it, "be on your best behavior; your replacement is just outside in the lot."
To date, no problems.
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10-10-2019 11:48 AM
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Originally Posted by Greentone
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Originally Posted by Max405
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Originally Posted by Max405
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Originally Posted by pilotony
Circuit boards and the micro components of transistor amps seem to me very difficult to work on. (From what I've heard--I have very little experience working with electronics.)
I've had a couple of SS amps that are 20+ years old. My current audio setup components are 30 years old--my Nakamichi amp still works, except that the electronic tuner doesn't tune. But 40 years seems to me pushing it.
Just as an aside I read an article that Apple touts their earbuds ($150) as being serviceable when the battery goes (apparently lasts 12-18 months), but that isn't true. They just throw away the old ones and give you a discount on a new pair.
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My Polytone Mini Brute I squealed too.
The power supply was the culprit.
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I suspected as much. Flaky capacitor(s)?
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Thanks for all the great suggestions. I intend to have the Polytone repaired. Meanwhile, its "replacement" Deluxe Reverb Re-issue has been knocking me out with its 50s crunchy tone.
Thanks again.
Tony D.
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Originally Posted by pilotony
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hey tony, your princeton morphed into a deluxe??? it'll be back to a twin soon!
haha
cheers
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Originally Posted by pilotony
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My 1978 102D died a few years ago. The repair guy actually emailed me pictures of the circuit board with a hole where something blew up. It was definitely unrepairable. I've been looking for a replacement archtop amp for a few years and the only one (from demos online) I considered was a Mambo.
However, wanting something more versatile, I am waiting for the delivery (any day now) of the Brute EQ pedal from jassmus to use in conjunction with a Boss Katana MKII. [Edit: Decided on a DV Mark Micro 50 CMT instead because it sounds warmer than the Katana.]
I wouldn't search for another Polytone. The caps and other components are old...waiting to fail.
I'd find something newer.Last edited by HCarlH; 11-05-2019 at 05:45 PM.
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Originally Posted by Greentone
nice!
I would ask you, why the preamp out (or main out in the earlier version), is so noisy? (mbII1980)
I can’t plug the cable on the mixer, too hum, ground noises.. zzzz zzzzz zzzzzzz my god!
Do you think latest model has a better sound output?
how to improve the output quality?
cheers
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Originally Posted by neatomic
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Sorry for the late response. I tried the preamp out on my 1980 (felt covered) Mini Brute II recently, at the request of my keyboard player (who runs the PA).
We didn't notice unusual noise. Your mileage obviously varies. The output, as is shown below, is called "Main Out." My manual, however, indicates that this is the preamp output.
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Originally Posted by archtopdream63
Likely a grounding issue. I have used the direct out with good results.
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Originally Posted by Greentone
Last edited by jazzmus; 11-05-2019 at 12:45 PM.
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kind of grounding noises...
i will check if the out is connected to ground.
Anyway, it’s a vintage output and I know I can’t ask for more.
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Found almost exact matches on eBay for the overdrive knobs. Both replaced in this picture. T18 6mm splined
19mm Control Knob T18 Splined, 6.0mm or 6.35mm D-Shaft, Movable Pointer K21 | eBay
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There's a polytone for sale locally. It's a 15 inch speaker with extension. Seems a little expensive because of the extra cab. Kinda curious what model and year this is? Its $550
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Originally Posted by callouscallus
Can anyone date this? goodwill epiphone
Today, 05:40 PM in For Sale