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Any chance someone can repost the files since this link is now expired? Thanks!
Originally Posted by Cordalis
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11-29-2023 06:33 PM
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Done. Sent by PM.
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Does anyone know how to have boards made from these docs? I'm used to submitting Gerber files to a manufacturer, but there are none in the archive.
Also, do we know why the 4 SMD caps are omitted? 3 of them bypass power / gnd traces for the op-amps, which seems like a very good idea (or at least it's standard practice).
Thanks.
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Could you please share the Polyclone file one more time..?
Am I too late..?
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PM your email and I'll send you a copy. But so you know, there are no Gerber files for the PCB. I'm not sure if that's an oversight or what. Originally Posted by greedy pelican
I'm still trying to figure out how to get boards made.
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Hi, I'm very late, could I also have a copy of the polyclone file? Thanks in advance.
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Could anyone send me the file please?
Regards
Rob
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Thank you very much
Inviato dal mio VOG-L29 utilizzando Tapatalk
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Sorry, do any of you know if this scheme is accurate, verified, have you tried to build it? Works? There are some differences in component values ??and also the circuit also looks a little different compared to the original schematic. It's not even clear what the ground is. Thanks to anyone who can help me
Inviato dal mio VOG-L29 utilizzando Tapatalk
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Hi for those who are interested in building this pedal, I can say that after a long time I managed to complete it and it works well, nice sound and great headroom. I inserted a charge pump 9/18 times, and I built the board according to the old Point to Point system since I was more familiar with this type of construction with tube amps. For those who are interested I can provide details. Originally Posted by Paoloibanez
Inviato dal mio VOG-L29 utilizzando Tapatalk
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Interesting! Do You have pics? Originally Posted by Paoloibanez
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For now I am not a member of the group and I can not post photos, at least that's what I think. I made the pedal with recycled material, the box is made with some aluminum parts obtained from data cassettes for personal computers from the 70s/80s, they were very sturdy and by assembling them together I managed to make a box. The schematic contained in the "polyclone" file is correct and the preamp works. I use it both in front of a littlejazz, and in its aux input, so without the littlejazz preamp. Sorry for the bad English Originally Posted by Herbie
Inviato dal mio VOG-L29 utilizzando Tapatalk
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Sure you can - maybe not from the Tapatalk dashboard though (I'm not familiar with it). Originally Posted by Paoloibanez
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Late to the party (hey, I'm new here!) so I apologize if this has already been asked & answered somewhere in the previous 13 pages of posts...
I have owned a Polytone MiniBrute III since I bought it new in 1980. It is a reliable workhorse of an amp, has been used for a ton of gigs with both guitar and bass, for lots of genres (not just jazz), and it has always performed serviceably
...but there is nothing about the tone of that amp that would make me think I needed a gizmo to recreate it if I was using a different amp.
Nothing.
To my ear the most definiing characteristic of the Polytone sound is its neutrality. It is almost completely characterless. So what could a "Polytone-In-A-Pedal" possibly do to make a different amp -- say, a Fender or Marshall or Vox or Henricksen or Roland etc. etc -- sound even more neutral, more characterless?!?! Subtract character before the signal hits the input stage?
I simply don't understand the use-case, or the demand, for such a sound.
:::shrugs:::
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Polytone amps are 1000% character. To a fault even... They do A thing, and it's awesome. Originally Posted by Bob_Ross
But to specifically answer your question, a baxandall'ish eq with tone switches is a good place to start. You won't find that on a lot of amps.
Personally, I find the biggest appeal of a Polytone is the feel. It's closer to a tube amp dynamic response than the typical SS amp. I would be curious to see how much of that is in the preamps circuit vs a sum of its parts.
PS, I bet if you plugged an Eq pedal into your Poly, you would be very surprised at how much "character" it has all of a sudden. You can get a very familiar fender'y sound.
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When I was younger, I made a few DIY pedals and amps. I found that layout board diagrams simplified procedures. This Baxandall layout board (below) would get you close, but the values would need tweaking to represent the Polyone schematic.
If you're interested, more info is available here:
Tonestacks - Bax in a box - active baxandall tonestack
Edit: There are plenty of other Baxandall guitar pedal schematics available on the web:
Last edited by GuyBoden; 04-05-2025 at 06:20 AM. Reason: Edit: There are plenty of other Baxandall guitar pedal schematics available on the web:
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If a Baxandall EQ with tube is what you are after, a Blackstar tube boost pedal will do that for you. Not a pre-amp per se. But if the preamp is a neutral characteristic then should do the job for you?
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Your Polytone's sound is "neutral" to you because you've been playing through it for 45 years and you're used to it. But it is not a neutral amp compared to one of the more modern PA type heads like the Acoustic Image Clarus amps or maybe Walter Woods. Or, to pick something in current production, Henriksen. Or go through an FRFR powered speaker, which is about as neutral as you're gonna find, as a comparison.
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I agree with this. I played strictly Polytone Minibrute II for about 25 years before I picked up some others, most notably a Fender Princeton Reverb Reissue and the Tone Master Twin Reverb. I've also fiddled with the Little Jazz and a couple of the heads made by Quilter. All of them great, though in the end the two Fenders have really captured my heart. I still have my POlytone, and because I often play both the Fenders and the Polytone on the same day, I can hear a difference in the sound. The Polytone is far from "neutral" by a long shot. In fact, I find most guitars I play through the Polytone sound much more alike than when I play them through other amps. The Polytone has a way of nudging whatever you are playing into a characteristic sound. It likely is the whole ecosystem of preamp, EQ, power amp, speaker, cabinet, etc. but its a very definite tone to me that I don't hear with the Fenders, though I increasingly prefer the TMTR over all the other amps. Originally Posted by Cunamara
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Here's a track I did using the Brute EQ pedal direct to the board.
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Here's another sample. I'm running the BruteEQ into a Quilter TB202, bypassing the Quilter pre-amp by using the Effect Return jack from the BruteEQ. Then I mic'ed the cab (L) , and also ran the XLR DI line out (R). I can't really hear much difference between the mic and the DI.
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Sounds great, both ways!
I haven't read the whole thread, was this device a preamp as well as an EQ?
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The Brute EQ direct sounds like a Polytone. Through the Quilter, there are some other added tonal qualities. It's brighter, for one thing, and the mids seem to be scooped a bit. And it sounds like there's some reverb which may count for a lot of the difference.
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I am hearing a nice clean guitar sound but - please don’t get upset - nothing that can’t be achieved with any reasonably decent solid state amp. Actually, almost identical to my Joyo American Sound or Quilter Superblock US when recorded directly….. don’t get me wrong, I would happily gig or record with that sound, but I was expecting a little more magic….. Originally Posted by lawson-stone
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