Search found 41 matches

by belltones
Sat Jul 25, 2020 5:50 pm
Forum: Music Tech DIY
Topic: Questions on the Prophet 5
Replies: 30
Views: 941

Re: Questions on the Prophet 5

Given that you know it's only a few kB of code and you know what peripherals are mapped where, it might be worth disassembling the ROM to see what's going on. Hi erroneousbosh, I recognize your username from elsewhere on the internet (reddit). Am I allowed to say that? Anyway, I wanted to jump in f...
by belltones
Sat Jul 25, 2020 5:40 pm
Forum: Music Tech DIY
Topic: Oberheim OB-Xa Servicing?
Replies: 100
Views: 19049

Re: Oberheim OB-Xa Servicing?

I know this is an old thread but wanted to put this information somewhere where people could easily find it. We just put Encore MIDI in a 100% functional OB-Xa and it immediately stopped booting up as soon as the Encore board was installed. I spent some time ruling out any other possible cause of th...
by belltones
Tue Jul 21, 2020 3:58 pm
Forum: Eurorack Modules
Topic: Behringer ARP 2500 modules
Replies: 194
Views: 10079

Re: Behringer ARP 2500 modules

My very first thought when I saw this was that I can't imagine Behringer being able to produce a remotely decent rendition of the slide switch matrix! From their mockups it looks like they might not be planning to try to, which I think is probably for the best. The cheap electromechanical parts used...
by belltones
Thu Jul 16, 2020 12:48 pm
Forum: Music Tech DIY
Topic: Source for wire?
Replies: 11
Views: 332

Re: Source for wire?

After ordering wire from many different places over the years, I now get all our wire from Remington industries (300V PVC insulation) and as far as I've discerend it's pretty much or exactly the same as the wire that comes from the Bulk Wire place except you can get good deals on a box of 6 or 10 sp...
by belltones
Tue Jul 14, 2020 7:50 pm
Forum: Music Tech DIY
Topic: LARGE MFOS System
Replies: 45
Views: 1908

Re: LARGE MFOS System

OK, you don't have to dumpster dive a medical power supply or use a stack of Meanwell switchers, there's a very concise, affordable and neat way to get/build a *linear* power supply for this. Start with the MFOS Adjustable Bipolar Power Supply (PCB on Synthcube: https://synthcube.com/cart/MFOS%20Adj...
by belltones
Sat Jul 11, 2020 1:44 pm
Forum: Music Tech DIY
Topic: Arp Omni 2 Repair – String Control Board
Replies: 1
Views: 107

Re: Arp Omni 2 Repair – String Control Board

I have a complete set of ARP service manuals that were given to me by a former ARP service manager and they include only one version of the Omni 2 service manual/schematic, and though the cover says "Models 2471, 2472, 2473 and 2475" every page says "2470" which I take to mean 247x. I don't know wha...
by belltones
Tue Jul 07, 2020 3:11 am
Forum: Music Tech DIY
Topic: extreme Moog MG-1 Realistic Concertmate expansion/mod kits coming soon - and a request for opinions!
Replies: 15
Views: 1313

Re: extreme Moog MG-1 Realistic Concertmate expansion/mod kits coming soon - and a request for opinions!

Thanks folks! In my opinion I think you should also look at: • Sustain, for a ADS- or ADR envelope. Makes a ton of difference. More than you would think actually. • Transpose -1 oct for both OSC's since they by default are rather high pitched. • Overdrive for a more saturated output Oh, one thing I ...
by belltones
Mon Jul 06, 2020 9:36 am
Forum: Music Tech DIY
Topic: extreme Moog MG-1 Realistic Concertmate expansion/mod kits coming soon - and a request for opinions!
Replies: 15
Views: 1313

Re: extreme Moog MG-1 Realistic Concertmate expansion/mod kits coming soon - and a request for opinions!

analoglsd wrote:
Mon Jul 06, 2020 1:10 am
I'd buy a couple...
Cool, any thoughts on what format you might prefer (full panel or separate mod board)?
by belltones
Mon Jul 06, 2020 9:29 am
Forum: Music Tech DIY
Topic: extreme Moog MG-1 Realistic Concertmate expansion/mod kits coming soon - and a request for opinions!
Replies: 15
Views: 1313

Re: extreme Moog MG-1 Realistic Concertmate expansion/mod kits coming soon - and a request for opinions!

OK @KSS... I guess I was mistaken about the backstory! I thought I'd read about it when I first got my first one about 10 years ago but maybe I didn't, or maybe what I read was just speculation. I should get my facts straight so I know whose work I'm undermining! But my other initial thought was tha...
by belltones
Sun Jul 05, 2020 4:27 pm
Forum: Music Tech DIY
Topic: extreme Moog MG-1 Realistic Concertmate expansion/mod kits coming soon - and a request for opinions!
Replies: 15
Views: 1313

Re: extreme Moog MG-1 Realistic Concertmate expansion/mod kits coming soon - and a request for opinions!

@Jarno, actually one of the reasons I chose this synth as the "target" for this project is because they are quite ubiquitous and relatively cheap in the US. Definitely the absolute cheapest Moog-- you can still find nonworking ones for ~$300 on Ebay pretty often which is hundreds less than the VERY ...
by belltones
Sun Jul 05, 2020 3:32 pm
Forum: Music Tech DIY
Topic: extreme Moog MG-1 Realistic Concertmate expansion/mod kits coming soon - and a request for opinions!
Replies: 15
Views: 1313

Re: extreme Moog MG-1 Realistic Concertmate expansion/mod kits coming soon - and a request for opinions!

(continued) So, now that I finally have the *final* PCB version finished and was just about to start making the install instructions, I've 90% decided to scrap that whole plan and remake the whole thing with a new, big, full-panel PCB. The advantages are obvious. No wiring for the person building/in...
by belltones
Sun Jul 05, 2020 3:30 pm
Forum: Music Tech DIY
Topic: extreme Moog MG-1 Realistic Concertmate expansion/mod kits coming soon - and a request for opinions!
Replies: 15
Views: 1313

extreme Moog MG-1 Realistic Concertmate expansion/mod kits coming soon - and a request for opinions!

OK folks, bear with me because I have both a lot of information to deposit here, and a sort of convoluted request for opinions! gonna break it into 2 posts. So I am closing in on imminently being able to release something I have been working on on and off for a couple years, what I have dubbed the "...
by belltones
Sat Jun 27, 2020 1:59 pm
Forum: Music Tech DIY
Topic: Lost in BJTs
Replies: 20
Views: 766

Re: Lost in BJTs

BJT fan club!
by belltones
Sat Jun 27, 2020 11:22 am
Forum: Music Tech DIY
Topic: Lost in BJTs
Replies: 20
Views: 766

Re: Lost in BJTs

My perspective is a little different because my head is 80% in servicing designs already built and 20% in designing, but I do have one simple thing to mention which was implied in some other people's answers, but which I can maybe help untangle from the more in-depth and specific discussions I saw a...
by belltones
Mon Jun 22, 2020 1:35 pm
Forum: Music Tech DIY
Topic: Need a tech in the East coast usa
Replies: 27
Views: 1873

Re: Need a tech in the East coast usa

Also, to all of you who are making assumptions about us without having ever had us do work for you: ask yourself, if you knew the same amount about us, only had seen that the owner was a 60-year-old man instead of a young woman, would you make the same assumptions about our credibility? Would you as...
by belltones
Mon Jun 22, 2020 12:36 pm
Forum: Music Tech DIY
Topic: Need a tech in the East coast usa
Replies: 27
Views: 1873

Re: Need a tech in the East coast usa

This is Alison, the "female" from Bell Tone... and WOW... I don't know who the person trash talking about us above is, but it appears that they are not someone who we ever did work for. It looks like they were just dissatisfied with an offer we made on a synth they were selling, did some Googling, s...
by belltones
Fri Feb 07, 2020 12:29 am
Forum: Modular Synth General Discussion
Topic: V/Oct to V/Hertz interface box or in-synth mods... interest?
Replies: 9
Views: 1019

Re: V/Oct to V/Hertz interface box or in-synth mods... interest?

I think I might just start by making a couple of desktop two channel ones (like the one above, but two channels and a less wacky-looking design) and put them up for sale. I know it's a niche thing, so I know it doesn't make much sense to go Full Production with it.
by belltones
Sat Feb 01, 2020 2:30 pm
Forum: Modular Synth General Discussion
Topic: V/Oct to V/Hertz interface box or in-synth mods... interest?
Replies: 9
Views: 1019

V/Oct to V/Hertz interface box or in-synth mods... interest?

Hi folks, so I just got done making this 4 channel V/oct to V/hertz converter box for a client using a PCB I designed loosely based on the Korg MS-02. It also has a v-trig/gate to S-trig converter for each channel: http://www.belltonesynthworks.com/blog/wp-content/uploads/2020/02/antilog-done-sm.jpg...
by belltones
Mon Nov 25, 2019 1:30 am
Forum: Music Tech DIY
Topic: mini-jack female nuts. What wrench tool ?
Replies: 9
Views: 693

This is the "official" "correct" tool:
https://www.fullcompass.com/prod/026125 ... d-nut-tool
by belltones
Wed Aug 07, 2019 10:24 am
Forum: Modular Synth General Discussion
Topic: EML 101/200/etc : Converters or Modifications for CV Control
Replies: 18
Views: 3667

I know this is an old thread but in case anyone is ever looking for this again-- My workshop now sell PCBs and kits of a circuit we designed to do this conversion that anyone who can solder can easily install in any EML-101 or 100. Either the Sequencer input jack or what was previously the CM3 outpu...
by belltones
Tue Aug 06, 2019 8:51 pm
Forum: Modular Synth General Discussion
Topic: EML-101 and EML-100 V/Oct mod PCBs and kits now available
Replies: 1
Views: 849

EML-101 and EML-100 V/Oct mod PCBs and kits now available

So I just put the PCB and kit I designed for an ElectroComp EML 101 and EML 100 V/Octave conversion mod up for sale, was doing a Google search to see if it had been indexed yet and found a thread on Muffs from a few years ago where people were talking about wanting such a mod... so I thought I'd pos...
by belltones
Sat Nov 10, 2018 6:33 pm
Forum: Music Tech DIY
Topic: Moog MG-1x highly modded Concertmate kits
Replies: 76
Views: 10486

I'm developing a super intense MG-1 upgrade kit that may be "the most" anyone's ever done because it actually adds a second onboard LFO and a second independent CV summer for OSC 2 to make the two oscillators fully independent. So you can have a sequencer play a bass line on Oscillator 1, play chord...
by belltones
Tue Oct 31, 2017 1:21 pm
Forum: Music Tech DIY
Topic: DIY String machine? (Hohner /Solina/ARP)
Replies: 44
Views: 3917

A potentially very cheap way of doing this that would allow you to make a full keyboard's worth of string synth and take care of some of the tedious parts for you (creating 12 oscillators, all those octaves thereof, keyboard building wiring, etc) would be to start with an inexpensive, no-name-brand ...
by belltones
Mon Sep 11, 2017 12:58 pm
Forum: Music Tech DIY
Topic: TL072 vs. TL082... sound and noisefloor
Replies: 37
Views: 42112

so interesting that they are all made from the same die. I didn't know that.

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