The Ovation Fan Club
The Ovation Fan Club
Forum Search | Statistics | User Listing Forums | Calendars | Albums | Language
Your are viewing as a Guest. ( logon | register )

Random quote: "Got time to breathe, got time for music." --Briscoe Darling.



Jump to page : 12
Now viewing page 2 [25 messages per page]
FIX THE OP PRO LOW OUTPUT

View previous thread :: View next thread
   Members Forums -> General PostingMessage format
 
moody, p.i.
Posted 2019-12-26 10:17 PM (#550813 - in reply to #526770)
Subject: Re: FIX THE OP PRO LOW OUTPUT


Joined:
March 2002
Posts: 15651

Location: SoCal
Dan, I passed along that Op Pro out of my own self interest. I figured that once you got into it, you'd understand what was going on and if I ever had a problem with the remaining one in the 87C, that you might have a handle on trouble shooting it.
Top of the page Bottom of the page
DanSavage
Posted 2019-12-27 7:00 PM (#550826 - in reply to #550811)
Subject: Re: FIX THE OP PRO LOW OUTPUT



Joined:
June 2012
Posts: 2303

Location: Lake Forest, CA
MatureWolf - 2019-12-26 2:11 PM

While I was doing this mod I wondered why Ovation would cut the output. Then, I remembered that the ADII as well as the OFC II guitars have a boost switch that 'increases' output 4 dB. I'm guessing that the 'boost switch' doesn't really boost anything. Instead it has a separate daughter board that has different values of resisters, such as those used in this mod, to remove the inhibition built into the circuit that you found.

Seems you got the point, Dan.

Supposedly, 1769 ADII has special "modified" can (=housing) + outer "Boost" switch whilst OP-Pro preamp itself is very standard.

;-)

Best,



That's interesting that the mod was in the can and not the pre-amp.
Top of the page Bottom of the page
DanSavage
Posted 2019-12-27 7:02 PM (#550827 - in reply to #550813)
Subject: Re: FIX THE OP PRO LOW OUTPUT



Joined:
June 2012
Posts: 2303

Location: Lake Forest, CA
moody, p.i. - 2019-12-26 8:17 PM

Dan, I passed along that Op Pro out of my own self interest. I figured that once you got into it, you'd understand what was going on and if I ever had a problem with the remaining one in the 87C, that you might have a handle on trouble shooting it.


The one you gave me is the first one I modified. I never did find the problem with the gain knob cutting out when turned > 9.

If you ever need a replacement OP-Pro, the best place to buy them is from Thomann Music in Germany. It's faster, cheaper and easier to buy a replacement from them than to try to fix a broken one.
Top of the page Bottom of the page
moody, p.i.
Posted 2019-12-27 7:51 PM (#550830 - in reply to #526770)
Subject: Re: FIX THE OP PRO LOW OUTPUT


Joined:
March 2002
Posts: 15651

Location: SoCal
I know. I was just teasing you.....
Top of the page Bottom of the page
Jump to page : 1 2
Now viewing page 2 [25 messages per page]
Jump to forum :
Search this forum
Printer friendly version
E-mail a link to this thread

This message board and website is not sponsored or affiliated with Ovation® Guitars in any way.
Registered to: The Ovation Fanclubâ„¢ Copyright (c) 2001
free counters
(Delete all cookies set by this site)