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Post subject: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 9:33 am
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I have a Blues Deluxe reissue. The volume knob on the clean channel goes to a very high decibel level when turning the knob from 1 to 2, which doesn't give me much choice or room for volume control when playing in my basement (where I only play). Seriously, it sounds like it's on 10 when in position 2! I've read on the internet that Fender apparently used the wrong type of potentiometer? Does anyone know about this who could shed some more light. Could I get it replaced under warranty? Is there a modification that can be done?

Thanks!


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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 9:46 am
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Use the search function at the top of the page for Blues Deluxe, or BDRI.

If it truly sounds like it's on 10 with the volume knob at 2, then you have a serious issue that should be looked at by a tech, if it's new take it back.

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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 9:52 am
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bluesdelux wrote:
I have a Blues Deluxe reissue. The volume knob on the clean channel goes to a very high decibel level when turning the knob from 1 to 2, which doesn't give me much choice or room for volume control when playing in my basement (where I only play). Seriously, it sounds like it's on 10 when in position 2! I've read on the internet that Fender apparently used the wrong type of potentiometer? Does anyone know about this who could shed some more light. Could I get it replaced under warranty? Is there a modification that can be done?

Thanks!


Fender did NOT use the wrong type pot for the clean volume control. All pots for the other controls are correct also. This is Internet BS that keeps getting spread around.

Follow shimmilou's advice. Also, when doing a search as shimmi suggested, add my name, bluesky636, to the search parameters. I have posted a lot about ways to get the best sound out of the BDRI. :wink:

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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 10:13 am
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shimmilou wrote:
Use the search function at the top of the page for Blues Deluxe, or BDRI.

If it truly sounds like it's on 10 with the volume knob at 2, then you have a serious issue that should be looked at by a tech, if it's new take it back.


I did use the search function first before posting—is there a specific term rather than just Blues Deluxe that could narrow the field? Maybe I exaggerated a bit about the volume, but it does seem to jump up in volume too quickly for being on 2, not a smooth transition.


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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 10:31 am
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Search my name and BDRI or Blues Deluxe Reissue.

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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 10:32 am
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bluesky636 wrote:
bluesdelux wrote:
I have a Blues Deluxe reissue. The volume knob on the clean channel goes to a very high decibel level when turning the knob from 1 to 2, which doesn't give me much choice or room for volume control when playing in my basement (where I only play). Seriously, it sounds like it's on 10 when in position 2! I've read on the internet that Fender apparently used the wrong type of potentiometer? Does anyone know about this who could shed some more light. Could I get it replaced under warranty? Is there a modification that can be done?

Thanks!


Fender did NOT use the wrong type pot for the clean volume control. All pots for the other controls are correct also. This is Internet BS that keeps getting spread around.

Follow shimmilou's advice. Also, when doing a search as shimmi suggested, add my name, bluesky636, to the search parameters. I have posted a lot about ways to get the best sound out of the BDRI. :wink:




The information I found noted that Fender installed a linear taper rather than a logarithmic taper. Apparently, the logarithmic would resolve the volume issue.

http://guitarless.com/2011/07/how-to-fe ... olume-mod/

Looking forward to seeing what you have posted bluesky636. How's your volume pot? Is it sensitive?


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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 10:45 am
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:lol:

I thought that it might be a slight exaggeration. It's a 40 watt tube amp, not made to be whisper quiet.

The schematic lists a 250k15A audio taper pot for the volume, and I haven't seen any amps with a linear taper pot installed from the factory. I guess that it is possible that some linear pots were installed by mistake, but no visual evidence offered that I could find. Check the stamp on your pot, look for the "A" next to the pot value.

BTW, the article that you referenced is about the master volume, which is a linear taper. :idea: Unless the gain is cranked, the master is not so sensitive to adjustment.

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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 10:50 am
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bluesdelux wrote:
bluesky636 wrote:
bluesdelux wrote:
I have a Blues Deluxe reissue. The volume knob on the clean channel goes to a very high decibel level when turning the knob from 1 to 2, which doesn't give me much choice or room for volume control when playing in my basement (where I only play). Seriously, it sounds like it's on 10 when in position 2! I've read on the internet that Fender apparently used the wrong type of potentiometer? Does anyone know about this who could shed some more light. Could I get it replaced under warranty? Is there a modification that can be done?

Thanks!


Fender did NOT use the wrong type pot for the clean volume control. All pots for the other controls are correct also. This is Internet BS that keeps getting spread around.

Follow shimmilou's advice. Also, when doing a search as shimmi suggested, add my name, bluesky636, to the search parameters. I have posted a lot about ways to get the best sound out of the BDRI. :wink:




The information I found noted that Fender installed a linear taper rather than a logarithmic taper. Apparently, the logarithmic would resolve the volume issue.

http://guitarless.com/2011/07/how-to-fe ... olume-mod/

Looking forward to seeing what you have posted bluesky636. How's your volume pot? Is it sensitive?


I cannot access that site from work, however, if they are claiming that the BDRI clean volume pot is a linear pot, they are dead wrong. The schematic clearly shows it as a log pot and that is exactly how it behaves.

http://support.fender.com/schematics/gu ... _Rev-A.pdf

The drive pot is also a log pot. The master volume is linear and that is the correct type pot for that function.

The problem is that the preamp has too much gain with a 12AX7 in V1. Intall a 5751 or 12AY7 in V1 and the clean volume will work perfectly. Mine does.

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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 10:52 am
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shimmilou wrote:
BTW, the article that you referenced is about the master volume, which is a linear taper. :idea: Unless the gain is cranked, the master is not so sensitive to adjustment.


HA! Thought so. That nonsense has been floating around on the net since time began. :lol:

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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 11:04 am
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Your preamp tube set recommendation, is my favorite and what I have been using for the BD. 5751 - 12AX7 - 12AT7.....perfection! (at least this was one of your preferred sets, :lol: )

Recently installed that lineup in this little beauty, really hated to give it back, so sweet! Original BD, not a reissue, from '93 IIRC.
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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 11:34 am
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shimmilou wrote:
Your preamp tube set recommendation, is my favorite and what I have been using for the BD. 5751 - 12AX7 - 12AT7.....perfection! (at least this was one of your preferred sets, :lol: )

Recently installed that lineup in this little beauty, really hated to give it back, so sweet! Original BD, not a reissue, from '93 IIRC.
Image


Yeah. Currently running a 12AY7 in V1 and 12AX7 in V2/V3. Overall gain is about the same but I found the bass with the 12AT7 in the PI to be too harsh.

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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 11:38 am
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Hey bluesky636 and shimmilou,

I really appreciate your feedback and confirmation about the pots, REALLY HELPFUL! I guess I should have thought to look at the schematics, however, none of it would have made sense to me anyway—I'm faaaar from any kind of electronic engineer. I can replace light bulbs, that's it! So, I might not be able to check to see if the pots have an "A." I feel better now knowing there isn't something wrong with my amp, which I LOVE. Such a beautiful looking and sounding amp.

bluesky636, I reviewed some of your posts and did run across the one about replacing the tubes, which you again noted on this post. That makes a lot of sense to me believe it or not. I'll try that once I can afford new tubes and a tech. BTW, where can I find the 5751 or 12ay7? Would I need to do anything with biasing?

Thanks again!


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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 12:16 pm
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bluesdelux wrote:
Hey bluesky636 and shimmilou,

I really appreciate your feedback and confirmation about the pots, REALLY HELPFUL! I guess I should have thought to look at the schematics, however, none of it would have made sense to me anyway—I'm faaaar from any kind of electronic engineer. I can replace light bulbs, that's it! So, I might not be able to check to see if the pots have an "A." I feel better now knowing there isn't something wrong with my amp, which I LOVE. Such a beautiful looking and sounding amp.

bluesky636, I reviewed some of your posts and did run across the one about replacing the tubes, which you again noted on this post. That makes a lot of sense to me believe it or not. I'll try that once I can afford new tubes and a tech. BTW, where can I find the 5751 or 12ay7? Would I need to do anything with biasing?

Thanks again!


My favorites:

http://www.kcanostubes.com/content/nos-jan-philips-5751

https://www.kcanostubes.com/content/nos ... 5751-1980s

http://www.kcanostubes.com/content/nos-jan-ge-12ay7

Biasing only applies to the power tubes. No tech is needed. You can do replacement yourself. If you search my posts you will also find how to bias the power tubes.

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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 12:44 pm
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Great! Thanks for the resources. Good to know I can do it myself. The preamp tubes are the smaller ones, correct? Looking at the back of the amp, which one is the V1?


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Post subject: Re: Blues Deluxe reissue volume too high
Posted: Mon Jun 11, 2012 12:59 pm
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bluesdelux wrote:
Great! Thanks for the resources. Good to know I can do it myself. The preamp tubes are the smaller ones, correct? Looking at the back of the amp, which one is the V1?


Looking at the back, tubes are counted from right to left.

Before opening up a tube amp, do a search on and read about tube amp safety. Tubes amps have very high voltages inside that can kill you, even if they have been turned off for awhile. Come back with questions when you are ready to bias your amp or change tubes.

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