electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Articles  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links  |  Store
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Echo Rockit troubleshooting help
Post new topic   Reply to topic Moderators: dnny, Uncle Krunkus, v-un-v
Page 1 of 1 [1 Post]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
xGx



Joined: Feb 11, 2019
Posts: 10
Location: USA

PostPosted: Wed Feb 05, 2020 12:41 pm    Post subject: Echo Rockit troubleshooting help Reply with quote  Mark this post and the followings unread

Hello there,

I have just finished building an Echo Rockit, but would like some help troubleshooting, if possible.

The main issue is that I can barely hear any output.... if I turn both the Echo Rockit and the amp up to 10 the output is still incredibly soft. The oscillator is inaudible at low frequencies... I am unable to get the nice low sound as in the demo video here: https://youtu.be/0NDlRXwpS1w?t=137

I only (faintly) hear the oscillator at higher frequencies... I don't know if that is a separate problem, or a result of the low amplitude.

Turning the echo volume up helps a little, but not much. However, it does sound as though the echo / delay section is operating correctly.

If I plug my Noise Toaster into the input, I still have trouble hearing anything, although again I can hear the NT coming through, albeit faintly.

So it is possible that everything is working correctly, I just have next to no volume... although it remains to be seen about the oscillator.

I have rechecked the wiring on the panel 4 times, as well as checked and rechecked component placement on the PCB. I have also reflowed my solder joints on the board and panel, and tried replacing all ICs. I have replaced C19 and C20 with film capacitors of equal value (330pf), and also replaced panel mounted capacitor C6 with a film capacitor of equal value (1uF).

I am attaching the relevant documents for convenience, and the project is here: http://musicfromouterspace.com/analogsynth_new/ECHOROCKIT/ECHOROCKIT.php

Anyone have any idea what I should try next? Please let me know if it would help to see any pictures or if you would like me to provide any meter readings. Thanks for the help!


echorockitpcbdesigs.gif
 Description:
 Filesize:  76.58 KB
 Viewed:  29 Time(s)
This image has been reduced to fit the page. Click on it to enlarge.

echorockitpcbdesigs.gif



echorockitpcbvalues.gif
 Description:
 Filesize:  79.95 KB
 Viewed:  27 Time(s)
This image has been reduced to fit the page. Click on it to enlarge.

echorockitpcbvalues.gif



echorockitschem_page_1_assembly.pdf
 Description:

Download
 Filename:  echorockitschem_page_1_assembly.pdf
 Filesize:  14.1 KB
 Downloaded:  33 Time(s)


echorockitschem_page_2_assembly.pdf
 Description:

Download
 Filename:  echorockitschem_page_2_assembly.pdf
 Filesize:  9.49 KB
 Downloaded:  29 Time(s)


frontpanelwiring1_assembly.pdf
 Description:

Download
 Filename:  frontpanelwiring1_assembly.pdf
 Filesize:  18.13 KB
 Downloaded:  30 Time(s)

Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: dnny, Uncle Krunkus, v-un-v
Page 1 of 1 [1 Post]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
e-m mkii

Please support our site. If you click through and buy from
our affiliate partners, we earn a small commission.


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use