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Username: mrbeezroom

Post Number: 30
Registered: 3-2004
Posted on Wednesday, February 01, 2006 - 10:00 pm:   Edit Post

Hi, I have an Orion-5 with stock electronics. When I was changing my preamp battery, I noticed a small part of the electronics (I assume the preamp itself)that has what looks like a small rotary adjustment. The part is blue with a white round adjustment(?)wheel. Is this for adjusting something within the electronics or tone shaping? I should probably know this, but at least here I feel confident enough to flaunt my ignorance and I usually end up learning something valuable that I can flaunt elsewhere. Thanks.
Senior Member
Username: bob

Post Number: 574
Registered: 11-2002
Posted on Wednesday, February 01, 2006 - 11:23 pm:   Edit Post

Flaunt away :-)

What you have discovered is the trim pot for adjusting the gain of the preamp. Depending on the instrument, there may be one or two, and we recently learned that sometimes when there are two, one of them has a piece of tape over it - a long story you can discover elsewhere.

You'll find lots of discussion by searching for either "trim pot" or "gain adjustment", but the short answer is that it allows you to adjust the output level. You can rotate it through about 3/4 of a turn or a little more (it is NOT a screw) from low to high, and the difference should be quite obvious. There is no standard or "correct" setting, it's just a matter of what works for you (try the search for various considerations).

Seems like we should have something on this in the FAQ. I did a quick skim of topics, and nothing jumped out at me - maybe it could be called "blue square with white circle", since that seems to come up fairly often?
Username: mrbeezroom

Post Number: 31
Registered: 3-2004
Posted on Wednesday, February 01, 2006 - 11:59 pm:   Edit Post

I am flaunting as we speak . . .thanks!
Username: davehouck

Post Number: 3126
Registered: 5-2002
Posted on Thursday, February 02, 2006 - 8:05 am:   Edit Post

In addition to what Bob said, two other points. One, the adjustment will have no effect on the tone coming from the bass. Two, if you set it too high it will clip some preamps.

Bob; I'll try to put up a FAQ later. Work beckons at the moment.
Username: mica

Post Number: 3040
Registered: 6-2000
Posted on Thursday, February 02, 2006 - 3:13 pm:   Edit Post

Good idea! I got the FAQ started for the trimpot subject.

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