Archive of the former Yahoo!Groups mailing list: Modular Synth Panels

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: [ModularSynthPanels] arp 4075

From: Ti_ <shari_en_jin@...>
Date: 2008-05-15

I know Dave Brown has a page with a link to an Front Panel Express file of a 1u face.
He's built some kind of summing amp into it so it can accept 3 inputs.  If a few more people want one we could save a few $s if we buy 5 or more.
currently it looks like the prices are:
1->5=$55.53
5->9=$49.98
10->19=$44.42
20->29=$38.87
Luckily I got the tempco when I bought my board from another list member a while back.  My big problem will be matching the transistors....
~Tim


--- On Thu, 5/15/08, loopcycle <loopcycle@...> wrote:
From: loopcycle <loopcycle@...>
Subject: Re: [ModularSynthPanels] arp 4075
To: ModularSynthPanels@yahoogroups.com
Date: Thursday, May 15, 2008, 12:08 PM

i would be really happy to see a 1U panel for the 4075.

i have no idea where to source a 1k87 tempco, so i was thinking i'd just use a
regular (1% metal film) 1k87. 1v/O tracking will be lost when the filter
self-oscillates.

according to the docs: "the filter works perfectly well without hand matching
the transistors. "

--- adaaxs <wonggster@gmail. com> wrote:

> I just got an analog metro 4075 board (a lot of us probably have). Are there
> enough of us to
> get a panel or will I end up housing it in a oops panel.
>
> It has 5 matched pairs of 2n5087, do I have an alternative to measuring a
> bag of these
> things, I don't really know how to do it properly.
>
> Should I use a 1 or 2k tempco Precision has no 1k87 in stock.
>
>