Search found 180 matches

by emuarc
Tue Sep 24, 2019 2:17 pm
Forum: Music Tech DIY
Topic: Roland System 700 DIY VCO
Replies: 61
Views: 19356

eBay or UTsource
I can send them to you for free if it’s a small order
Drop me an email at sales@amsynths.co.uk

I must get my 702 working ☺️☺️
by emuarc
Sun May 12, 2019 12:25 pm
Forum: AMSynths
Topic: JP8 Filter
Replies: 88
Views: 15825

10x 8109 JP8 filters will be shipping in 10 days, drop me an email at sales@amsynths.co.uk to preorder. The 8328 filter module is in stock now, for anyone wanting a CEM3328 low pass filter.
by emuarc
Thu May 09, 2019 2:23 pm
Forum: Music Tech DIY
Topic: The open source Jupiter-8-4-ALL project
Replies: 74
Views: 8445

Very cool using the 3310 as a basis. How did you use the modulation input to vary the timing? I was aiming to get the replica into a 16 pin footprint...
by emuarc
Thu May 09, 2019 5:47 am
Forum: Music Tech DIY
Topic: The open source Jupiter-8-4-ALL project
Replies: 74
Views: 8445

Hi, I have started researching the IR3R01 envelope chip in more detail, and there is a post on my website to record progress to a working replica here: https://amsynths.co.uk/2019/05/09/roland-ir3r01-clone/ . If anyone has ideas or real world measurements please comment on the post or here. My initi...
by emuarc
Fri Apr 12, 2019 6:43 am
Forum: Music Tech DIY
Topic: who can clone arp 2500 "wing" cab size system
Replies: 83
Views: 6312

The design files are being loaded into Github so anyone can have panels and PCBs manufactured, as they are licensed as open source. There are few restrictions and there is no warranty or liability
by emuarc
Thu Apr 11, 2019 10:57 am
Forum: Music Tech DIY
Topic: who can clone arp 2500 "wing" cab size system
Replies: 83
Views: 6312

Time for a progress update on my ARP 2500 replica! It is now an Open Source Hardware project with files being loaded into my Github repo and there is a progress update on every module here: https://amsynths.co.uk/home/my-synths/2500-rack/ Latest module is the 1047, and here is the front panel: https...
by emuarc
Tue Apr 02, 2019 1:38 pm
Forum: AMSynths
Topic: JP8 Filter
Replies: 88
Views: 15825

Thanks for the positive feedback and another batch of 10x 8109 modules are being built in April.
by emuarc
Sun Mar 17, 2019 4:14 am
Forum: AMSynths
Topic: AM8320 panel - any new stock soon ?
Replies: 2
Views: 826

Hi,
Panels will be in stock at end of March and I will put the CAD file in the manuals section of the web site.
by emuarc
Sun Mar 17, 2019 4:10 am
Forum: AMSynths
Topic: JP8 Filter
Replies: 88
Views: 15825

Hi
Possible cause is the M5210 switching op amp that takes the 12 and 24db outputs from the IR3109. Its a SIP chip. I can send you a repalcement for free just drop an email to sales@amsynths.co.uk
by emuarc
Sun Jan 20, 2019 8:20 am
Forum: Music Tech DIY
Topic: BA662F vs BA662
Replies: 8
Views: 1231

Pin 6 to 7 resistance = 10M ohm Pin 6 to 8 diode connected with cathode to pin 6 Pin 7 to 8 no connection Pin 8 is of course -VE The equivalent of Pin 6 in the BA662 is connected to the buffer as a control signal, and it is connected to GND, +VE or -VE in various Roland applications. Maybe pins 6 an...
by emuarc
Sat Jan 05, 2019 5:16 pm
Forum: AMSynths
Topic: JP8 Filter
Replies: 88
Views: 15825

Hi
Panels will be back in stock in late January, along with a batch of skiff friendly AM8109 modules. Its a great filter!
by emuarc
Sat Dec 29, 2018 1:13 pm
Forum: Music Tech DIY
Topic: The open source Jupiter-8-4-ALL project
Replies: 74
Views: 8445

Hi, Great project and thread, keep up the excellent work! I have some info on the JP4 envelope generator here: AM8108 The Roland design is innovative but very heavy on component count and really needs log not linear pots for control. Having individual trimmers for each envelope stage in a polysynth ...
by emuarc
Mon Dec 03, 2018 6:22 am
Forum: AMSynths
Topic: JP8 Filter
Replies: 88
Views: 15825

The latest 2018 Mouser BOM for the AM8109 is on our website in the manuals section. www.amsynths.co.uk
by emuarc
Sat Oct 13, 2018 11:39 am
Forum: Music Tech DIY
Topic: Arp 1601 Sequencer clone
Replies: 1982
Views: 136941

Hi, Wood and plywood end cheeks for the 1601 clone are in stock at our webstore Plywood https://www.amsynthstore.co.uk/JML_1601_Plywood_Ends/p1461448_19194501.aspx Real Wood https://www.amsynthstore.co.uk/JML_1601_Wood_Ends/p1461448_19194491.aspx This is the only stock we will have this year but we ...
by emuarc
Wed Oct 10, 2018 1:39 am
Forum: Music Tech DIY
Topic: Arp 1601 Sequencer clone
Replies: 1982
Views: 136941

Boat and Sides Update

Hi
It looks like Jamie is restocking 1601 pcbs and panels, and possibly boats. If he doesnt restock boats I will place an order of 25. Hope to know this week.

I do have wood and plywood end cheeks ready, and they will go on our web store at the weekend. About 10 sets in total.
by emuarc
Mon Jul 16, 2018 8:37 am
Forum: Music Tech DIY
Topic: Arp 1601 Sequencer clone
Replies: 1982
Views: 136941

Hi, The original boats were: 5 off @ GBP 53.55 each plus VAT plus p&p. 10off @ GBP 37.40 each plus VAT plus p&p. 20off @ GBP 26.90 each plus VAT plus p&p. 50off @ GBP 20.15 each plus VAT plus p&p. I will probably order 20 which means around 35 GBP plus shipping to customer. I’ll need to factor in so...
by emuarc
Sun Jul 15, 2018 2:40 pm
Forum: Music Tech DIY
Topic: Arp 1601 Sequencer clone
Replies: 1982
Views: 136941

Boats Order

Hi
Is anyone interested in buying a boat for the project? I may place an order in August but need to know the potential demand first. Price will be as cheap as I can make it, not looking to make profit. European shipping is easier, but will send to Synthcube as one shipment for US.

Best regards Rob
by emuarc
Sat May 05, 2018 4:21 am
Forum: AMSynths
Topic: Discrete Jupiter4 AM8121 LPF HPF
Replies: 6
Views: 3132

Hi,
A number of new Roland VCF's are on the way from AMSynths:

JP04 VCF and HPF in late May
JP08 and JP06 VCF re-issues
SH07 VCF and HPF

The 8121 has been redesigned to be skiff friendly and could be re-issued before Behringer issue their 100M copies.
by emuarc
Fri Apr 20, 2018 2:37 am
Forum: Music Tech DIY
Topic: DSL-man.de & DIYSYNTH.de important info
Replies: 37
Views: 2747

Very sorry to hear the news but the right decision. Do some synth DIY in any spare time to keep the passion alive. I have bought some 1601 wood ends from your store and hope that helps with cash flow.
by emuarc
Sat Apr 14, 2018 4:36 am
Forum: Music Tech DIY
Topic: ARP 1601 clone Build Thread
Replies: 853
Views: 59371

looking at the picture I think you have a 1N400X in D6 when it should be a 10V Zener. Thats why you only get 0.57V... :-) :razz:
by emuarc
Sat Apr 14, 2018 4:34 am
Forum: Music Tech DIY
Topic: ARP 1601 clone Build Thread
Replies: 853
Views: 59371

The SWITCH header has 4 connections to enable the power supply to be switched off by a DPDT switch. Pin 1 and 2 are one pole and pin 3 and 4 are the other. Pins 1 and 2 should be connected with thick wire, and pin 3 and 4 if you dont want to use a switch. You may need to enlarge the panel hole for t...
by emuarc
Sat Jan 13, 2018 9:23 am
Forum: AMSynths
Topic: Just built an AM8320
Replies: 7
Views: 1993

The AM8320 Prophet filter module and PCB's will be back in stock soon using the new AS3320 chip (which we sell for 5 GBP). Its a revised PCB design, single PCB mounted to the panel horizontally.
by emuarc
Tue Dec 12, 2017 4:22 pm
Forum: Music Tech DIY
Topic: reverse engineering the IR3109
Replies: 93
Views: 24583

A progress update: Moved to using ZVP2106 FET's which are thru hole have VGS at -3.5V. Dropped the BJT output buffers on 2 and 4 pole. This works alot better, but I will add a single BJT as a buffer on each output. I will also try out the J176's as well and a Roland design for the expo converter - a...
by emuarc
Mon Dec 11, 2017 5:02 pm
Forum: Music Tech DIY
Topic: Retrieve Roland IR3109 from Boss PH-2
Replies: 17
Views: 545

Hi, We made a manual all about it... great to make our JP8 and JP6 filters..... http://https//www.dropbox.com/s/w72dq9eryuvd2f0/Boss%20PH-2%20Chip%20Extraction%20Manual.pdf?dl=0 Cutting the pcb reduces the heating stress on the IR3109,but it us a robust chip, but it does explode if you reverse the p...

Go to advanced search