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Post subject: Blue DeVille (not reissue) volume pot too sensitive
Posted: Sat Mar 12, 2011 6:12 pm
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I purchased an 1993 Fender Blues DeVille. I've discovered that the volume control for the clean channel is extremely sensitive. I did a Google for a solution but the only thing I found is a modification for the master volume.

I'm wondering if this is a bad pot or an actual design flaw. Moving from 1-2 on the volume will make your ears bleed and it's almost impossible to adjust between 1 to 1 1/2 to find a comfortable volume.

I'm capable of change out the pot, just don't know what type and value. Anyone know if this is a standard problem or what pot can be use to replace it?

Thank You


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Post subject: Re: Blue DeVille (not reissue) volume pot too sensitive
Posted: Sat Mar 12, 2011 7:55 pm
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some_change wrote:
I purchased an 1993 Fender Blues DeVille. I've discovered that the volume control for the clean channel is extremely sensitive. I did a Google for a solution but the only thing I found is a modification for the master volume.

I'm wondering if this is a bad pot or an actual design flaw. Moving from 1-2 on the volume will make your ears bleed and it's almost impossible to adjust between 1 to 1 1/2 to find a comfortable volume.

I'm capable of change out the pot, just don't know what type and value. Anyone know if this is a standard problem or what pot can be use to replace it?

Thank You
This is a design flaw that they changed on the HR 3 version.I had a hr deluxe with the same problem.


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Post subject: Re: Blue DeVille (not reissue) volume pot too sensitive
Posted: Sat Mar 12, 2011 9:41 pm
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Hi some_change,

The schematic calls for an audio taper pot (250K ohm, 15A taper), and apparently some amps got them and some didn't, I've heard it both ways, even for the HRDlx which calls for the same pot. My '98 HRDlx has the audio taper pot stock for the clean channel, and it works fine, not reaching full volume until about 10. I am able to adjust it to a very low volume and at 2 is still low enough for home use. I have a replacement pot for the Master Volume pot in my HRDlx (100K ohm B taper), because the stock pot is a linear taper and acts as you've described for your Volume pot. (have the pot, just not installed yet)

I think that the original is: Fender® Control Snap-in 250K 15A Potentiometer - 004-7540-000 (please double check the part number to be sure to get the correct one). I don't know where you like to shop.

http://www.guitarpartssite.com/FENDER-R-VHD-250KA-p/r-vhd-250ka-ce.htm
http://www.guitarpartsnow.com/Fender-reg-Control-Snap-in-250K-15A-Potentiometer-p/fender-pot-004-7540-000-gpn.htm
http://www.darrenriley.com/shop/cart.php?m=product_detail&p=1332
http://www.beyondeleven.com/Fender-reg-Control-Snap-in-250K-15A-Potentiometer-p/fender-pot-004-7540-000.htm

This pot will work well as a replacement for the clean channel volume, although it is not an exact replacement for the original, doesn't have the attached cage. I ordered this same type for my amp's Master Volume.

http://www.mouser.com/ProductDetail/Alpha-Taiwan/RV16AF-20-15S1-A250K/?qs=bigP3%252bYrkGFLJpxE7GJfBw%3d%3d

There may be other places that sell the original pot in an audio taper as well. Look for a pot with a 250K ohm, 15% (or 20%) audio taper, solid shaft pot, made for BDlx, BDvl, RIs and HRDlx. :idea:

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Post subject: Re: Blue DeVille (not reissue) volume pot too sensitive
Posted: Sat Mar 12, 2011 11:22 pm
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Didn't they change the taper on the Treble pot as well on the "Gen III" hot rods?

Art


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Post subject: Re: Blue DeVille (not reissue) volume pot too sensitive
Posted: Sat Mar 12, 2011 11:55 pm
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Yes. :)

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Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


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Post subject: Re: Blue DeVille (not reissue) volume pot too sensitive
Posted: Sat Apr 30, 2011 2:19 pm
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I owned the same amp you have in the 4X10 version. Sorry it is what it is. This one is a topic of unending discussion on forums concerning these amps. After looking at all of the proposed solutions I found none of them to be to my liking and finally traded it in for a Twin Reverb.


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Post subject: Re: Blue DeVille (not reissue) volume pot too sensitive
Posted: Sun May 01, 2011 10:50 am
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some_change wrote:
I purchased an 1993 Fender Blues DeVille. I've discovered that the volume control for the clean channel is extremely sensitive. I did a Google for a solution but the only thing I found is a modification for the master volume.

I'm wondering if this is a bad pot or an actual design flaw. Moving from 1-2 on the volume will make your ears bleed and it's almost impossible to adjust between 1 to 1 1/2 to find a comfortable volume.

I'm capable of change out the pot, just don't know what type and value. Anyone know if this is a standard problem or what pot can be use to replace it?

Thank You


Another option that you might want to consider is the use of lower gain tubes. I have a Blues Deluxe Reissue and use a Philips JAN 5751 in V1, a JJ 12AX7 in V2, and a JJ 12AT7 in V3. Both the 5751 and 12AT7 have a gain factor of 60 to 70 (compared to the 12AX7 gian factor of 100). The net result is that in order to get the same volume levels as a stock amp with 12AX7s in all three spots, the volume knobs must be set higher which allows for smoother operation of the volume control away from that 1 - 2 hot spot. Turned up, the amp is just as loud, you just have to turn the volume controls a little higher to get the same levels. Works great.

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Post subject: Re: Blue DeVille (not reissue) volume pot too sensitive
Posted: Thu May 26, 2011 7:30 am
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I have this problem on my Fender Blues Deville 4x10 re-issue and it drives me crazy trying to get the correct volume. I was thinking or trying the following mod. Has anyone done this to any great degree of success?

http://www.amprepairparts.com/ampkits.htm


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Post subject: Re: Blue DeVille (not reissue) volume pot too sensitive
Posted: Thu May 26, 2011 8:09 am
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I just got this email reply from a tech in www.studiosoundelectronics about the problem.

"The pots are different, and currently there isn't a reasonable fix for the
volume control in the clean channel. Changing the pot there won't work -
it would take a rather extensive redesign of the circuit. The only
simple fix is for the master volume in the drive channel."


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Post subject: Re: Blue DeVille (not reissue) volume pot too sensitive
Posted: Thu May 26, 2011 8:19 am
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As I stated earlier, in discussing my tube reccomendations, I have absolutely no problems with the volume controls on my BDRI. Playing by myself at home (I don't gig), I run the clean and drive channel volumes anywhere between 6 and 8 and the master volume at 4 or 5. The reduced gain of the tubes allows you to turn the conrtols up past the problem spot on the pot curves while not blowing you out of the room. Better solution in my opinion, than changing volume control pots as you would still have the amp gain to contend with.

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Post subject: Re: Blue DeVille (not reissue) volume pot too sensitive
Posted: Fri May 27, 2011 4:27 am
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I tend to use my amp as a two channel amp and regularly have the drive on 10-12.

I could just get a better overdrive pedal and use the drive channel only to give better control of the volume. What setting to you generally set the drive at to get a little break up on the clean (I use a strat).


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Post subject: Re: Blue DeVille (not reissue) volume pot too sensitive
Posted: Fri May 27, 2011 6:33 am
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Thirtyplus wrote:
I tend to use my amp as a two channel amp and regularly have the drive on 10-12.

I could just get a better overdrive pedal and use the drive channel only to give better control of the volume. What setting to you generally set the drive at to get a little break up on the clean (I use a strat).


Because of the reduced preamp gain from the 5751, both clean and drive channels act effectively as two clean channels. I then get my dirt from a Fulltone Full Drive 2 MOSFET operating in the MOSFET mode. I use the clean channel with Input #1 for my Fender SCN equipped Strat and the drive channel with Input #2 (which also rolls of the bass slightly) for my humbucker equipped guitars.

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