|
|
Post by sten on Jan 20, 2011 16:18:58 GMT
|
|
|
|
Post by Charlie Hall on Jan 20, 2011 17:36:47 GMT
Hi Sten,
If you have a main board type revision A or revision C then you can remove C14 and C17. For board revision E the components are much the same but numbered differently, on that latest type of board you remove C8 and C9.
The third pic looks like a factory modification to the memory reset circuit of what appears to be a revision A board. I have seen several early Q2 units modified exactly like this. This is a required modification for updating the software chip to version 2.00 or 2.01.
Regards,
Charlie
|
|
|
|
Post by sten on Jan 20, 2011 17:57:04 GMT
Thank you Charlie.
Now I dare to remove.
Greetings
Sten
|
|
|
|
Post by clivea on Jan 20, 2011 19:14:41 GMT
Just as a matter of interest, what difference does it make to the sound in removing the capacitors? Why are they there in the first place?
(Obvious that I'm not tech. minded eh?).
Rgds - Clive
|
|
|
|
Post by Charlie Hall on Jan 20, 2011 19:21:47 GMT
Hi Clive,
Alesis probably had to include them for some kind of regulations for interference. The problem is that while the inputs are high impedance, they are only completely high impedance with the capacitors removed. Connecting to the inputs from units with a low output impedance is OK such as in studio environments.
With a guitar input, the capacitors will give the sound of a very long cable, with the associated loss of highs and a nasal sound.
Regards,
Charlie
|
|
|
|
Post by clivea on Jan 20, 2011 19:24:19 GMT
Ah! Thanks Charlie.
Sten, is this why you're doing it?
Clive
|
|
|
|
Post by musikxpressen on Jan 21, 2011 9:01:29 GMT
Hi Charlie!
Is it the same operation for the Q20? And with the same numbers?
How simple is the operation? Can I do it myself - I'm not a technical genious.
Best regards
Jan
|
|
|
|
Post by sten on Jan 21, 2011 12:03:19 GMT
|
|
|
|
Post by Charlie Hall on Jan 21, 2011 14:16:31 GMT
Hi Jan,
If your Q20 was programmed by me then the capacitors are already removed.
Otherwise, the capacitors' numbers and their location is different. They are C6 and C11 and are very difficult to reach without taking the Q20 apart because they are mounted on the reverse side of the sub boards that the input sockets connect to.
Regards,
Charlie
|
|
|
|
Post by musikxpressen on Jan 21, 2011 23:18:08 GMT
Hi Charlie!
Thanks for your answer.
My Q20 is programmed with your EFTP patches, but you send them to me by mail for programing by myself.
I can understand from your answer, that you don't recommend removing the capacitors myself - or can you mail me a diagram that shows the location and instructions "how to do it"?
Best regards
Jan
|
|
|
|
Post by Charlie Hall on Jan 22, 2011 1:50:56 GMT
Hi Jan,
Sorry, I don't have a diagram. To get to the capacitors easily, you really need to dismantle the unit to remove the main board and the sub boards. It is a bit tricky to do that but OK if you are careful with the ribbon connectors that connect the small boards to the main board.
I have some new Q20 main boards that still have the sub boards attached to the main boards. I could take a pic of one and email it to you if that would help to identify the component positions but to get to them you still really need to do the above.
Regards,
Charlie
|
|
|
|
Post by erikMAMS on Jan 22, 2011 9:29:26 GMT
Hi Jan
Before you go to dismantle the unit to remove the caps - have you tried to put a low imp buffer ahead of the Q20 to hear the difference. If you normally run the guitar directly into the Q20 - inserting a low imp buffer would equal the removal of the caps soundwise, I believe. Most Boss pedals works as a low imp buffer (in bypass mode).
Erik
|
|
|
|
Post by musikxpressen on Jan 22, 2011 12:27:45 GMT
Hi Charlie og Hi Erik!
Thank you very much for your answers.
I run my Q20 through a loop in my t.c.electronic G-System board and bypass all other effects on the board.
Will you say thats an OK way to do it, and therefor I don't have to remove the capasitors?
Anyway Charlie, I would be glad to recieve the pics you refer to. My e-mail adress are: infoACmusikxpressen.dk (replace AC with @)
Thanks again.
Best regards
Jan
|
|
|
|
Post by Charlie Hall on Jan 22, 2011 14:18:24 GMT
Hi Jan,
The Q20 should work fine in the loop. The effects send should be low impedance, so it should not be necessary to remove the capacitors.
I will take one or more pics and send them to you later.
Regards,
Charlie
|
|
|
|
Post by sten on Jan 23, 2011 16:30:26 GMT
|
|
|
|
Post by musikxpressen on Jan 24, 2011 11:00:51 GMT
Thanks again Charlie!
It works going through the loop in the G-System, but I just wondered if I could get a more smooth and warm sound, if the capacitors were removed?
Anyway, I look forward to see those pics you will send me.
By the way - I have ordered a Gemini III that I plan to put before the G-System.
Have you any experience with this unit and the way it works?
Regards
Jan
|
|
|
|
Post by betowelch on Jan 24, 2011 12:39:35 GMT
Hi Sten:
The sound it's really great. And after your experience I'm thinking to replace these capacitors on my Q2 too.......
Do you think that it could be easier to do it by myself or I will need a technical service?
Cheers from Brazil!
Roberto
|
|
|
|
Post by erikMAMS on Jan 24, 2011 13:40:07 GMT
Hi Jan
Removing the caps will not give you more smoothness and warmth. It'll give you more highs.
Roberto
Removing the caps will only make a difference if you run the guitar directly into the Q2, if you still have your CS-2 in the chain it will work as a buffer and prevent the loss of highs.
Erik
|
|
|
|
Post by betowelch on Jan 24, 2011 13:53:33 GMT
Roberto Removing the caps will only make a difference if you run the guitar directly into the Q2, if you still have your CS-2 in the chain it will work as a buffer and prevent the loss of highs. Erik Hi Erik: Just only to confirm and understand upper mentioned. My intention it's for have more highs. In my chain I have a Boss CS-2 but it's quite always in by-pass position. In this case (having a CS-2 as by-pass) if I remove these capacitors on Q2 I will have more highs? Cheers from Brazil Roberto |
|
|
|
Post by Charlie Hall on Jan 24, 2011 14:19:30 GMT
Hi Jan,
Removing the capacitors will give more highs if you normally connect the guitar directly to the Q2. This could translate to a smoother tone if the treble on the amp is reduced to compensate, and that will make the Q2 quieter with background hiss too. However, with other configurations such as an effects loop, or a pedal like the CS-2 as in Roberto's case, then removing the capacitors will not really make any difference.
I have the Gemini III and it works well for reducing the low end of the guitar for the early Shadows sound.
Hi Roberto,
The CS-2 will still act as a buffer in the bypass mode, so it will still give a better sound while the capacitors are not removed.
Regards,
Charlie
|
|
|
|
Post by betowelch on Jan 24, 2011 14:50:44 GMT
Hi Roberto, The CS-2 will still act as a buffer in the bypass mode, so it will still give a better sound while the capacitors are not removed. Regards, Charlie Hi Charlie: OK. Now understood. In my case it will be better leave it as it's. Cheers from Brazil! Roberto |
|
