tag:blogger.com,1999:blog-17775202.post7671246798606672935..comments2024-03-27T10:06:45.689-07:00Comments on MATRIXSYNTH: ARP2600 filter 4072 modification?matrixhttp://www.blogger.com/profile/06364921840391533422noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-17775202.post-74057492315755599592007-03-26T16:03:00.000-07:002007-03-26T16:03:00.000-07:00i think dave should post photos next time he does ...i think dave should post photos next time he does it. no offense, but it sounds like these directions could mess up a few 2600s since hes not sure how to describe where to do this mod, and also because posting this information without a disclaimer - like "you could really mess up your arp if you dont know what youre doing" - may mislead some people into thinking this is within their skill level Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17775202.post-75741524803392324262007-03-26T07:23:00.000-07:002007-03-26T07:23:00.000-07:00"Why does he add 4 resistors in parallel with the ..."Why does he add 4 resistors in parallel with the existing one, since ONE resistor of a certain value would accomplish the same thing"<BR/><BR/>I think there are 4 resistors that need to be modified by soldering 4 new resistors in parallel (1 per resistor) to reduce it's resistance. This can also be done as you said by removing the originals and replacing all 4 resistors but desoldering through Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17775202.post-48627496480409807772007-03-25T22:58:00.000-07:002007-03-25T22:58:00.000-07:00I have the CMS Cirocco filter upgrade on my orange...I have the CMS Cirocco filter upgrade on my orange and black 2600. I tried the test and I can still hear signal.It's not out of the audio range. Shouldn't the filter upgarde fix the flaw?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17775202.post-35090851461475888672007-03-25T19:18:00.000-07:002007-03-25T19:18:00.000-07:00I've read that it was 12kHz, but whatever.Why does...I've read that it was 12kHz, but whatever.<BR/><BR/>Why does he add 4 resistors in parallel with the existing one, since ONE resistor of a certain value would accomplish the same thing.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17775202.post-64205519090297673622007-03-25T14:52:00.000-07:002007-03-25T14:52:00.000-07:00More on the museum -http://search.retrosynth.com/a...More on the museum -<BR/>http://search.retrosynth.com/ah/search/lookit.cgi?-v9809.346Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17775202.post-22230240235693034872007-03-25T14:07:00.000-07:002007-03-25T14:07:00.000-07:00Not mentioned is that the trimmer behind the panel...Not mentioned is that the trimmer behind the panel might be set too low or one's hearing not good at high frequencies.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17775202.post-15849702497828269612007-03-25T13:03:00.000-07:002007-03-25T13:03:00.000-07:00The second generation 2600 filter had a design def...The second generation 2600 filter had a design defect that limited the bandwidth to something like 8KHz. The simple resister mod brings the filter back to its intended bandwidth.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17775202.post-78843717572411450012007-03-25T11:45:00.000-07:002007-03-25T11:45:00.000-07:00Ok but what is the filter mod suppose to do? He ne...Ok but what is the filter mod suppose to do? He never does explain why one needs to go through all the trouble unless the whole point is to annoy your dog. :DAnonymousnoreply@blogger.com