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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Sat Sep 28, 2013 6:55 am
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BMW2002Ti wrote:
Bill,

I got 15 NOS 1952 Sylvania JAN-JHS 6L6GA for $50 about ten years ago. If you are interested, I can try to find them in my infinite stash.


:lol:


Thanks, but I'll pass. :D

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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Sat Oct 05, 2013 4:09 pm
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Still working on liking the JJ 6V6S power tubes. I do like them better than the E-Hs. I liked the E-Hs clean, but not so much overdriven. The JJs are much thicker sounding clean and that carries over to the overdrive sound. One other thing I did was to replace the 56K s l o p e resistor I installed earlier in this thread with the stock valued 100K s l o p e resistor. The combination of the JJ 6V6S and the Cannabis Rex speaker made the lower mids/upper bass too muddy. Going back to the higher valued resistor cleared that up. I do like the fact that all three amps (BDRI. 5F6A/C Bluesman, and the Wrecking Ball) sound very different from each other. Gives for a nice choice of tones. Maybe one day I'll learn how to really play the guitar. I wonder if Leo said the same thing? :lol: :lol: :lol:

Note: If I spell s l o p e normally, I get $@!&#. :lol: :lol: :lol: :lol:

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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Sat Oct 05, 2013 4:25 pm
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bluesky636 wrote:
...Note: If I spell s l o p e normally, I get $@!&#. :lol: :lol: :lol: :lol:


I wondered why you did that. :lol:

Tune in next week for the <bum, bum, buuuummmm> FINAL MOD! :lol:

I also found that one of my BH amps sounds best with the JJ 6V6, which is a neat tube, somewhere between a 6V6 and 6L6 in sound. For a classic 6V6 sound though, the EH is hard to beat......at least in amps meant for a 6V6. I was surprised how quickly you went from wow! to meh with the EH.

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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Sat Oct 05, 2013 4:51 pm
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shimmilou wrote:
bluesky636 wrote:
...Note: If I spell s l o p e normally, I get $@!&#. :lol: :lol: :lol: :lol:


I wondered why you did that. :lol:

Tune in next week for the <bum, bum, buuuummmm> FINAL MOD! :lol:

I also found that one of my BH amps sounds best with the JJ 6V6, which is a neat tube, somewhere between a 6V6 and 6L6 in sound. For a classic 6V6 sound though, the EH is hard to beat......at least in amps meant for a 6V6. I was surprised how quickly you went from wow! to meh with the EH.


Yeah, initially the E-Hs sounded really nice, especially the cleans. If that's all I wanted I would have kept them in. But when overdriven, I found the lows, particularly on the low E string, had a really nasty, raspy sound to them. The JJs are much smoother in the lows when overdriven.

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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Fri Oct 25, 2013 5:39 pm
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Well, believe it or not, I am still running the JJ 6V6S tubes in the BDRI and have really gotten to like them. I did make one change to the tube configuration which really helped cement the tone.

I changed out the 12AY7 in V1 and went back to a JJ ECC83S (the first one I tried had gone microphonic :shock: ). Previously, with the 12AY7 in V1 I had to set the clean volume to 10 and plug into input #1 with my humbucker equipped guitars to get any grit out of the clean channel. Now I can drop the clean volume down to 8 and plug into input #2 and go clean to gritty with the guitar volume control. I can plug my Strat into input #1 and do the same (with the 12AY7, the Strat in input #1 and clean volume on 10 was always clean). The volume is definitely lower than with the 6L6GCs, but the amp is still plenty loud. I highly recommend this tube combination (V1-V3 12AX7 of your choice, V4/5 JJ 6V6S). :D

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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Mon Oct 28, 2013 7:46 am
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Great mods!

Cheers!


Last edited by Feelyfeels on Mon Oct 28, 2013 7:13 pm, edited 1 time in total.

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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Mon Oct 28, 2013 9:37 am
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Last edited by bluesky636 on Thu Oct 31, 2013 8:12 pm, edited 1 time in total.

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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Mon Oct 28, 2013 7:09 pm
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Oh... Then I am sorry..
I thought this was a general mods to the Blues deluxe thread.. Im terribly sorry for being ignorant and just post. I should've asked.. ! It was for a good intention.. Since I find your BDRI mods to be really good, I felt for giving a little something back that you and other BDRI users might like!

I'll delete the post..

Sorry again!


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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Thu Oct 31, 2013 8:24 pm
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Feelyfeels wrote:
Oh... Then I am sorry..
I thought this was a general mods to the Blues deluxe thread.. Im terribly sorry for being ignorant and just post. I should've asked.. ! It was for a good intention.. Since I find your BDRI mods to be really good, I felt for giving a little something back that you and other BDRI users might like!

I'll delete the post..

Sorry again!


Feelyfeels,

Please accept my apology for my rude and inconsiderate response to your earlier post. I am very sorry. I know it is no excuse, but I have been under a considerable amount of pressure and stress at work (I have a major delivery to my government customer next Friday, after which I will probably be laid off) that has caused considerable emotional and physical pain. My response to you was uncalled for.

I normally do not recommend a mod until I have had a chance to thoroughly evaluate it both mathmatically and electrically. I had actually considered making the feedback resistor switchable some time ago, but did not like the increase in gain that would have resulted. Depending on the circuit design, such an increase could cause instability in the amp resulting in oscillations. However, since I have made some other mods that have changed the amp gain structure slightly and am using 6V6S tubes vice 6L6GC tubes in the power amp, I may take another look at this mod. In fact, I have been tossing around the idea of changing the output tubes from adjustable fixed biased to cathode bias. It may be some time before I get around to all this, but when/if I do, it will be accompanied by a detailed explanation of what I did and the resulting impacts to the amp's sound and performance.

Again, please accept my apologies and feel free to join in the discussions at any time.

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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Mon Dec 02, 2013 4:36 pm
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Well, after about two months of playing my BDRI with 6V6 type tubes (E-H 6V6GT first, followed by JJ 6V6S), I have finally reached the conclusion that I am just not a 6V6 kind of guy. :lol: Both sets of tubes sounded good clean and when overdriven with my Strat (using SCN pickups), but neither set sounded good when overdriven with any of my humbucker equipped guitars. With both sets of tubes, humbuckers exhibited a farty, raspy bass without the "whomp" of 6L6GCs. Also, the lack of clean headroom with humbuckers was unacceptable. So I have gone back to my previous tube configuration of:

V1 = NOS JAN GE 12AY7
V2 = JJ ECC83S
V3 = Balanced JJ ECC83S
V4/V5 = JJ 6L6GC

It was an interesting and worthwhile experiment. It wasn't the first to end up not staying in the amp. Some people may like the tone, I just wasn't one of them. :(

With this, I conclude my thread on modding the BDRI. There are other things I have thought about that could be done but I think I will just quit now while the amp sounds really good. Feel free to post any additional comments or questions. Time to play my guitar. :D

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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Tue Dec 03, 2013 5:33 am
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Same here, went back to 6L6 after trying the 6V6. Even though it was interesting, I'll save the 6V6 for amps made for them. Maybe if your previous mods were geared toward the 6V6 to begin with........ooops! Forget I said that........ :lol:

I'm sure that your BDRI sounds sweet as can be, just the way that you have it now, great job man! 8)

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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Tue Dec 03, 2013 7:40 am
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shimmilou wrote:
Same here, went back to 6L6 after trying the 6V6. Even though it was interesting, I'll save the 6V6 for amps made for them. Maybe if your previous mods were geared toward the 6V6 to begin with........ooops! Forget I said that........ :lol:

I'm sure that your BDRI sounds sweet as can be, just the way that you have it now, great job man! 8)


Actually, I think you're right as far as gearing the mods to 6V6 vs 6L6. The biggest difference I noted in Fender's 6V6 based amps (Princeton Reverb, Deluxe Reverb, SS22) is the fact that much more negative feedback is used in the power amp stage to keep the overall loop gain down compared to the BDRI and Hot Rod series in general (even the Twin Reverb uses a heavy amount of negative feedback to keep things clean). The exception is the 5E3 Deluxe with no negative feedback which causes that amp to break up almost immediately. :lol:

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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Wed Mar 05, 2014 8:55 pm
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Thanks for a great thread Bill. I'm still trying to get my mind around all of the tube options. I retubed my BDRI with a JJ 6V6 "kit" from Eurotubes. I generally thought that improved the sound but I only have the stock GT 6L6 tubes as a comparison. Reading your results, you have me second guessing that move. Maybe I should have gone with JJ 6L6's. I was thinking about changing to a 12AY7 in V1 because I keep reading how much more musical it is. Once again, your results have me questioning the idea of running a 12AY7 in combination with 6V6 power tubes. I did recently change the speaker to an Eminence CR, but I have not had a chance to use it a band volume. At least I should be safe with that change :lol:

I am considering your tone stack mod. Does that produce improvements on the drive channel too?

I see others recommending the so called TwinStack mod on the middle eq pot. I have seen you state in other threads that you don't see the need. The general idea of it seems logical and it would be fairly easy to do while implementing the tone stack mod. Is there a specific downside associated with this mod that causes you to recommend against it?

Thanks again for documenting your experiments here. Very educational.


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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Wed Mar 05, 2014 10:31 pm
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IIRC, bluesky636 didn't state a downside to the jumper on the mid pot, just that he liked the control of the mids just fine without the jumper, and didn't feel the need to dial out more mids. For me, the jumper allowed the ability to dial out more mids, to a much more scooped tone, while retaining the ability to have the same amount of mids as without the jumper. I find that the whole tone stack has a broader range with the jumper. IMO, there is no downside to adding the jumper, except maybe the labor involved (I pulled the board and added the jumper underneath, rather than trying to put the jumper on top).

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Post subject: Re: Modifications To The Fender Blues Deluxe Reissue Amp
Posted: Wed Mar 05, 2014 11:13 pm
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The BillM Twinstack mod is a matter of taste. Shimmilou prefers a more scooped mid tone. I prefer fatter mids, more typical of what you get with a tweed type amp. I also tend to turn the bass all the way down with humbuckers. The Cannabis Rex has a very strong bottom end and my amps sit close to the wall behind them, further boosting the bass. With humbuckers, the bass can get a little overwhelming. Right now for humbuckers my settings are treble = 4, bass = 1, mid = 6, and Presence = 8 with the bright switch on and clean volume at 5. I don't gig, but I do have the luxury of being able to crank my amps at home without complaints (well, I don't crank them late at night).

For the record, I am also now running a 5751 in V1 instead of a 12AY7. I wanted to get a little gain back for some good drive out of the clean channel (I no longer use pedals and don't use the drive channel although my mods have it sounding really good). Can't remember if it is a NOS JAN 5751 or a new JJ 5751, though. :lol:

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