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FDP Forum / Amp Mods, Repairs, and Projects / JJ vs GT

Previous 20 Messages  
NHILL1

United States

Nov 29th, 2016 03:01 PM   Edit   Profile   Print Topic   Search Topic

Interesting, I have a tung-sol 12ax7 so when the Sovtek's come I'll be able to compare them directly. What do you prefer about the tung-sols? I thought they were kind of treble-y, in a thin kind of way. Just my thoughts :o

MLC
Contributing Member
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It's not just good..

...it's good enough.
Nov 30th, 2016 07:21 AM   Edit   Profile   Print Topic   Search Topic

I like mirrorboy's word - "sweet"

I think the Tung Sol's have a nice, well-balanced tone. I don't find them thin, at all. In fact, I hear a nice, round top end from them and I like the way they react to volume changes - especially when you start pushing them.

Coming from the JJ's, I suppose they might sound thin, at first. The JJ's being darker might make the TS's sound that way.

Now that we're talking about all this, maybe I should try messing around with the Sovtek's I have. (;^D)


mirrorboy

Yorkshire, England

Nov 30th, 2016 10:01 AM   Edit   Profile   Print Topic   Search Topic

I'm glad MLC answered the OP's last question as I find it difficult putting the detail in subjective opinion.

I do concur with MLC. The Tung-Sol are rounded and sort of midway between JJ and Chinese Ruby on the tonal spectrum.

Another thing, I think Tube Amp Doctor make the sweetest 6v6. It's the 6V6GT STR.

NHILL1

United States

Nov 30th, 2016 11:22 AM   Edit   Profile   Print Topic   Search Topic

MLC, your the first person whos heard what I heard! To me the tung sols are just kind of pokey in the top end. I compared it to a stock sovtek in my SRRI and I immediately put the sovtek back. Imo the top end is covered by the bright switch, you dont need the top end from the tube.

On the other hand jj's tend to be too dark in my DRRI, hence I've long struggled thinking it was the amp that was dark and muddy, but neither did I care for the tungsols in mine. It wasn't until I researched what fender put stock in a DRRI that I found out theres another option.

BbendFender
Contributing Member
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American Patriot

About as ordinary as you can get.
Nov 30th, 2016 11:52 AM   Edit   Profile   Print Topic   Search Topic

A local tech worked on my Deluxe Reverb and 2 of my Princeton Reverbs. He put in JJ 6V6's and they worked well except in the last Princeton. I replaced them with some used but good Tung-Sol and now it sounds much better.
I have very few "new" tubes. For many years I have used tubes that I salvaged from older components and have never had a tube failure.

MLC
Contributing Member
**********

It's not just good..

...it's good enough.
Nov 30th, 2016 01:44 PM   Edit   Profile   Print Topic   Search Topic

"Imo the top end is covered by the bright switch, you don't need the top end from the tube."

None of my amps have a bright switch. (;^)

"It wasn't until I researched what fender put stock in a DRRI that I found out there's another option."

Oh, there are options - LOTS of options.

NHILL1

United States

Nov 30th, 2016 02:15 PM   Edit   Profile   Print Topic   Search Topic

Lol what I know that sounds weird MLC, but I always thought Sovtek was for metal amps/high gain applications, turns out Fender regularly uses them. I had no clue.

Also I had a bright switch installed in my DRRI, likewise the SRRI comes with one :) Likewise, I like the sound with the bright switch on, the way it acts with the circuit makes a very acoustic sound and pure bliss imo.

Bbend Fender: I was really only talking about 12ax7's as they relate to the main gain stages, v1, v2, and v4 in blackface amps. Likewise I only buy new production tubes, I don't see the allure of old stock tubes.

(This message was last edited by NHILL1 at 04:18 PM, Nov 30th, 2016)

MLC
Contributing Member
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It's not just good..

...it's good enough.
Nov 30th, 2016 02:48 PM   Edit   Profile   Print Topic   Search Topic

Never felt the need to add a bright switch to my DR (it's a '68).
I've got the Tung Sol RI tubes in the preamp, but the 6V6's are NOS Marconi - it sounds amazing (to me, anyway - though others have made similar comments about it).

I'm glad I got the Marconi's when I did - even bought a 2nd pair after realizing what a great sound they have. NOS prices have gotten pretty crazy, though, so I won't be doing that again anytime soon. One of the benefits of NOS is longer life - so maybe I won't have to worry about my DR for a while. (:^)

NHILL1

United States

Nov 30th, 2016 03:34 PM   Edit   Profile   Print Topic   Search Topic

Who knows man, different horses for different courses. Lot's of love for tung-sols here, I personally like what comes with fender amps stock. I've found that out through painful experience and lots of spent dollars trying out different things. The only thing I'd consider is re-biasing if the amp comes cold, blackface amps tend to be biased a little colder than they should be. But as far as parts are concerned, in the future I'm approaching my amps with care and caution, I'm not so hasty to try to change things.

After all this time I've owned my amp, I spent the majority of the time f*cking with it, and now I'm just trying to put it back the way it was, go figure.

On a note, I keep hearing many reviews complaining about the Sovtek 12ax7wa's, out right calling them bad tubes. I don't understand this as they're stock in fender blackface amps, and the stock BF fenders sound great. I don't see tung-sols in any modern production amps, so I wonder where people are getting these ideas from that they're vastly superior to what comes stock in many production amps.

(This message was last edited by NHILL1 at 06:01 PM, Nov 30th, 2016)

NHILL1

United States

Nov 30th, 2016 04:45 PM   Edit   Profile   Print Topic   Search Topic

Also, I decided to pull this quote from tdpri.com, and I agree with this guy...

"I used to take people's advice on tubes and it even led me to almost getting rid of my Rivera because I thought it was doomed. Then I started doing some research. I had been running ALL JJ's. BIG mistake my amp always sounded like there was a thick moving blanket over the top of it. I now am running JJ's in the power section and Sovtek's in the preamp. 12ax7wa's. The Blues Jr. I believe came with 12ax7wa's from the factory. That's what I would stick with. These mass produced amps were designed to run their best with cheap available tubes. Your best bet would be to find what it came with stock and find the best graded version of those tube sets. this of course is strictly MHO :) I hope you find something that works for you!!"

Quote

Hammond101
Contributing Member
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So. Cal. USA

Nov 30th, 2016 05:32 PM   Edit   Profile   Print Topic   Search Topic

There are many tubes out there and many amps. For the most part I have no issues with JJ tubes and have them in most of my amps. I will say the JJ 6V6 is a very robust tube, handles higher B+ voltage and sounds much like a 6L6. I like that.

Note that GT does not make tubes. All of their tubes are made by different manufactures and relabeled/branded, same goes for TAD.

Try several brands both preamp and power amp and play what you like best in that amp. It is the way of the world.

Also the DR and DRRI have a bright cap built in so the stock amp is playing the circuit with the bright switch always on in the trem channel. Installation of a bright switch basically turns the bright cap on and off like BF amps equipped with the switch.

I don't put the bright cap in my builds unless there is a switch. I'd rather turn up the treble a bit as I find it smoother on top. I also fiddle with the mid resistor and add just a bit more middle and a less scooped tone.



NHILL1

United States

Nov 30th, 2016 05:44 PM   Edit   Profile   Print Topic   Search Topic

The main issue for me Hammond is actually lack of treble content, and overall headroom. I agree with you in that I like JJ 6v6's, but if I'm correct the JJ 12ax7's is what is causing the issue I'm having. I have to wait till my replacement tubes come in, which are Sovtek 12ax7wa's (OEM tubes).

(This message was last edited by NHILL1 at 07:52 PM, Nov 30th, 2016)

catnineblue

LA , Calif

I try my best
Nov 30th, 2016 08:25 PM   Edit   Profile   Print Topic   Search Topic

I don't recall Sovtek tubes being in older BF or even SF amps. All I ever saw were RCA and GE and Sylvania. First I saw GT or Sovtek were in 94 fender Blues Deluxe and Pro Jr's I had.

The only one I replaced those in was a 2001 Pro Jr because of noise and used JJ's sounded fine to me 12ax7's and the power tubes.
I have a Sovtek 12ay7 in one build I have for the preamp. I used EH 6V6's in another build I no longer have they sounded fine in that. I have a matched pair of EH 6V6's I never tried other than one in my SF AA964 Champ build and it sounded to bright. I just like JJ 6V6s.

NHILL1

United States

Nov 30th, 2016 08:41 PM   Edit   Profile   Print Topic   Search Topic

Groove tubes 12ax7s are relabaled sovteks.

http://www.thetubestore.com/Tubes/Groove-Tubes

(This message was last edited by NHILL1 at 10:43 PM, Nov 30th, 2016)

MLC
Contributing Member
**********

It's not just good..

...it's good enough.
Dec 1st, 2016 07:34 AM   Edit   Profile   Print Topic   Search Topic

"I don't see tung-sols in any modern production amps, so I wonder where people are getting these ideas from that they're vastly superior to what comes stock in many production amps."

I can't speak for anyone else, but I got "the idea" that they were superior after buying them, plugging them in, and comparing them.
I think they sound better than the JJ's or Sovtek's that I had used previously - based on what my ears are telling me.

As far as what Fender (or anyone else) puts into their amps at the factory, there are as many business decisions guiding those choices as there are sound/tone related decisions. Maybe more.
Cost, availability, existing relationships between companies, etc...

As with most gear-related choices, we're all ruled by our own personal preferences. Thankfully, there are plenty of options out there for all of us.


NHILL1

United States

Dec 1st, 2016 11:28 AM   Edit   Profile   Print Topic   Search Topic

Btw MLC I wasn't speaking to anyone personally, I was just flabbergasted by the negative reviews I read about Sovteks, and what appeared to be over inflated reviews for tung sols (by tube sellers).

(This message was last edited by NHILL1 at 01:42 PM, Dec 1st, 2016)

MLC
Contributing Member
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It's not just good..

...it's good enough.
Dec 1st, 2016 12:11 PM   Edit   Profile   Print Topic   Search Topic

No worries, NHILL1.
One of the "benefits" of all this internet information - lots of reviews of everything, pro & con.

It's all good info to have, but in the end, it's just somebody's opinion. And we all know what opinions are like....

NHILL1

United States

Dec 3rd, 2016 04:42 PM   Edit   Profile   Print Topic   Search Topic

Just a quick update, the Sovteks came in and worked WONDERS! The ugly, muddy bass end is all but vanished, and there's a noticeably more aggressive, and tight bass end with more clear and prominent high end.

I posted already but thought I would here as well. End of the day, Sovteks WORK (for me...in this particular amp). I was really ready to throw my amp away, but now, holy cow! That big ugly blanket has been lifted, and I have 2 blackface amps! What do I do!.....*rubs hands maniacally*

(This message was last edited by NHILL1 at 06:43 PM, Dec 3rd, 2016)

NHILL1

United States

Dec 5th, 2016 02:08 PM   Edit   Profile   Print Topic   Search Topic

No one's interested? :< I was excited to announce this lol, and to find the resolution to my issues with my amp. I ended up purchasing not only the Sovtek 12ax7's, but after comparing JJ 12at7's to GT 12at7's I also preferred the GT's again and bought them.

I also made a short clip to demo both amps and I think they both sound absolutely great now. I can't wait to get the 12at7's for the DRRI, that'll help clean up the reverb and I think it also cleans up the sound in the phase inverter.

Comparison SRRI vs DRRI

MLC
Contributing Member
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It's not just good..

...it's good enough.
Dec 6th, 2016 06:13 AM   Edit   Profile   Print Topic   Search Topic

Glad you found what works for you - that's always a good thing.

Previous 20 Messages  

FDP Forum / Amp Mods, Repairs, and Projects / JJ vs GT




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