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Re: MOTM-650 bug reporting time

2009-08-21 by xiphiguy

Paul, Please include the ability to daisy-chain two 650s in the update. I purchased two so that I could take advantage of this advertised feature. ~Terry

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Re: [motm] MOTM-650 bug reporting time

2009-08-20 by Paul Schreiber

The EXT CLK is hard-wired as input only: there is a LM311 comparator circuit to allow any waveshape (not just squares/pulses) to be a clock. Jeffrey still gets

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Re: [motm] MOTM-650 bug reporting time

2009-08-20 by James Elliott

Damn it! I would volunteer to be a beta tester for this as I ve been bitching about these bugs either privately to Paul or openly to this list over the last

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Re: [motm] MOTM-650 bug reporting time

2009-08-20 by Ben Stuyts

Hi Paul, ... Maybe this is related: if I power up the 650 after the connected midi keyboard (a GEM S2), the 650 will sometimes lock up. The Gem S2 sends out

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RE: [motm] MOTM-650 bug reporting time

2009-08-20 by John L Rice

Thanks Paul, I ll try to get some debug time in this weekend. Two bugs I encountered that you didn t mention below (and I ll give exact details on in a few

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MOTM-650 bug reporting time

2009-08-20 by Paul Schreiber

I have collected MOTM-650 bug reports over the years and sent them in as a whole to Jeffrey so he can address them. In many cases, he is unable to reproduce

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Update

2009-08-17 by Paul Schreiber

I received all of the MOTM front panels Friday except the 700s, and those should be here this week. I can now start looking at the kits to finally ship. I need

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FS: panels and brackets

2009-08-14 by Scott Juskiw

I ve got some panels and brackets I m not using, all official MOTM parts with no significant wear or rack rash. Priced to sell, buyer will have to pay shipping

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Polymoog Resonantor Clone PCB preview

2009-08-12 by JH.

http://electro-music.com/forum/phpbb-files/poly_m_reso_preview_769.jpg This was an easy one to layout. And it will be an easy project to solder, this time! And

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Update

2009-08-10 by Paul Schreiber

a) Shipping MOTM-650s this week, if you have a 650 on order you should get it shortly. b) MOTM-410s are at the tech, next up 830s followed by 300s. c) wire

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JH improvisation music download

2009-08-09 by JH.

Hi, I just put up 24 minutes of improvisation from October 2007 for download. It s a 58MB mp3. It starts rather calm, with some looping of the JH-720 and the

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FS Buchla Lopass Gate

2009-08-07 by babysealclub

I have an extra Thomas White / Buchla Resonant Lopass Gate Module. While it is absolutely cool, I don t think I need two. Module is based on the Bridechamber

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Update

2009-08-03 by Paul Schreiber

I will be back to regular shipping schedule for the next several weeks. The MOTM-650 panels have arrived, and I will be building several units the next few

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About the resistor....

2009-08-02 by Paul Schreiber

a) the resistor is used to minimize DC offset drift over temerature. b) the bad effect is added noise, but in this use it doesn t matter. It also can add

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RE: [motm] Missing resistor

2009-08-02 by Craig Critchley

I vaguely recall discussion of audio mixer circuitry where the reason to omit the resistor was that it adds noise. If that s right, I guess here you make the

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Re: [motm] Missing resistor

2009-08-02 by JH.

My guess is that it s probably a relict from a circuit that used an opamp with higher input bias current. The MXL1014 would probably just work as well with the

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Re: [motm] Missing resistor

2009-08-02 by Paul Schreiber

... This is sort of a hand waving answer you write on a test when you forgot the real answer :) ... Well that part is correct. ... Application dependent. I

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Re: [motm] Missing resistor

2009-08-02 by Paul Schreiber

... This is correct but only half the answer. Keep going............. ... No, but a good guess :) Paul S.

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Re: [motm] Missing resistor

2009-08-02 by Richard Brewster

According to the Musical Engineer s Handbook (Bernie Hutchins, 1975), 3a (10), The purpose of the resistor is to compensate for the offset due to the current

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Re: [motm] Missing resistor

2009-08-02 by Ben Stuyts

... Oooh, pick me, pick me! :-) (Although it s been a while...) The input bias current into the minus input causes a voltage drop across the input resistors.

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Re: [motm] Missing resistor

2009-08-02 by Miguel Mendoza

Thanks a lot for your answers, I have some 15K ;-) Bonuses scape from my knowledge, but interesting, so... what? Regards. Miguel. ... From: Paul Schreiber To:

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Re: [motm] Missing resistor

2009-08-02 by Paul Schreiber

Correct, not critical, 15K to 33K will work, 5% ok. Bonus: what is the specific *purpose* of this resistor, and ... Bonus #2: what bad effect results from

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Re: [motm] Missing resistor

2009-08-01 by Ben Stuyts

... It s not that critical. Optimally, it should be the same as the input resistance seen on the minus input of U4b, but as that is connected to a whole bunch

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Missing resistor

2009-08-01 by Miguel Mendoza

Hi group, I m starting to build a MOTM 300 kit that I was keeping on a shelf and I m missing the 22K resistor for R49. I d like to ask if any of you know if I

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RE: [motm] Re: no-clean solder

2009-08-01 by John L Rice

Check out All-Spec too, pretty good prices on Kester! ;-) 24-6337-6401 organic $23.99 http://www.all-spec.com/products/KW33105.html 24-6337-8814 no-clean

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Re: no-clean solder

2009-08-01 by wjhall11

Hi Chris - 533-24-6337-6401 - organic 533-24-6337-8814 = no-clean http://www.mouser.com/catalog/catalogUSD/639/2148.pdf Bill and Will

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no-clean solder

2009-08-01 by chris walcott

hello list. i am running out of no-clean solder that i ve gotten from paul over many kits and was wondering what to order. does anyone have a mouser part

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Re: [motm] VCO Problems

2009-07-31 by Graham Atkins

Jesse, Re check the 300, you must have a short on the power rails somewhere on that module. Plugging it in with the frame powered up would not normally cause a

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Re: [motm] VCO Problems

2009-07-31 by mcb, inc.

... 1. *STOP* plugging it into your power supply. It s clearly not operating anywhere near normal conditions if it is affecting other modules. 2. Component

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VCO Problems

2009-07-31 by spacebardubs

Hey y all I m new here and this is the first post I ve made, so Hello. I just built a bunch of MOTM modules, all of which work great, except for one boneheaded

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