Author Topic: Im Hooked - an SF-2 tale (Read 610 times)

cntrabssn · « **Reply #15 on:** December 10, 2006, 09:02:49 PM »

Hello Tom,

If each individual channel works in stereo and you're getting low (or no) signal from Ch B in mono, I think you should also check the Ch B input jack. When you're in mono mode, the direct signal from Ch A (post direct-gain) is routed to Ch B via an extra contact on the Ch B input jack (info taken from the SF-2 manual). If this contact is dirty or 'sprung', this might explain the low signal getting to Ch B in mono mode. When you run in series mono, your jumper cable takes the extra contact out of the circuit. I would try exercising the B input jack as Mica recommends for F1-X effects return jacks (plug in/out a few times). If this doesn't work, check the jack to make sure its other connections are OK. As a reference, the procedure to clean/check the F1-X jack is here:

http://club.alembic.com/Images/16271/16301.html?1107539286

Good luck,
- nate.

(Message edited by Cntrabssn on December 11, 2006)

echo008 · « **Reply #16 on:** December 11, 2006, 05:37:04 AM »

Nate you got it!
plugging in and out of Ch. B In
A dozen or so times fixed the problem
I now can run the SF2 in through my effects loop as intended.
Send> Ch. A In
Return> Ch. B out

again thanks guys for taking the time to help.
- Tom

David Houck · « **Reply #17 on:** December 11, 2006, 07:50:12 AM »

Congrats!!!

Nice catch Nate!!

cntrabssn · « **Reply #18 on:** December 11, 2006, 11:12:23 AM »

That's great news! I'm glad I was able to help.

By the way, I double-checked the diagram in the manual and noticed something else. With the switch in the mono position, connecting a cable between A-out and B-in still gives you mono (not series-mono) mode. This is basically what Tom reported in his first post. I think this could come in handy if the extra internal contacts on the B input jack fail for any reason. Also with the cable installed, you could go from 'regular-mono' to 'series-mono' by just flipping the switch from mono to stereo

- nate.

bob · « **Reply #19 on:** December 11, 2006, 12:04:29 PM »

RTFM, eh? I was thinking it must be something along these lines when I referred to the magic of the connections, but didn't pursue the thought sufficiently.

Glad this worked out. Have fun, Tom.

echo008 · « **Reply #20 on:** December 11, 2006, 12:26:41 PM »

Again thanks Guys, Bob/Dave you guys were a big help for sure.
Nate also again thanks for filling in the blanks, Im very glad I do not need to take this in to have it looked at by someone who might know less about than even I do.
- Tom