ShortScale Forum Index
www.shortscale.org
Head 'n Neck Above
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups     RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
UploaderUploader  

EL34s - your experience?

 
Post new topic   Reply to topic    ShortScale Forum Index -> Effects, Amps & Gear, Pedal Building
View previous topic :: View next topic  
Author Message
NickS
.
.


Joined: 14 Jan 2008
Posts: 10602
Location: Nr. Basinggrad, UK

PostPosted: Wed Feb 24, 2021 11:26 pm    Post subject: EL34s - your experience? Reply with quote

I have been pratting around with mods to my Marshall JTM60 as mentioned elsewhere. The time has come to reassemble it, but I noticed some intermittent noise when I powered it up. Removing the phase inverter (V4) made no difference, so the problem was clearly in the output stage. At this point I remembered that when my son's TSL100 started doing this it was actually the EL34s that were the problem. I put in a pair of NOS JJ E34Ls and the problem went away.

So my collection of valves consists of:
1 pair Svetlana EL34s; one is good, one microphonic. I replaced them with JJ E34Ls when the one went microphonic causing horrible feedback.
1 pair of Mesa EL34s, both are good (in Matt's TSL100, not sure how much they were gigged)
1 pair of JJ E34Ls, both are slightly noisy (in Matt's TSL100, , not sure how much they were gigged))
1 pair of old JJ E34Ls; they've been in the JTM60 for a few years and one is very noisy while the other seems to start noisy and settle down a bit.
1 pair of NOS JJ E34Ls, same vintage as the noisy ones.

Just for now I've put the quiet Svetlana and the least noisy old E34L into the amp. I'm not too fussed about matching them at the moment.

Are there any other EL34 users out there, and what has your experience been with different brands? I'm tempted to try something other than JJ if JJs always go noisy.

[Edit; added Matt's JJ E34Ls]


Last edited by NickS on Thu Feb 25, 2021 11:03 pm; edited 1 time in total
Back to top
View user's profile Send private message
Mike
I like EL34s


Joined: 20 Apr 2006
Posts: 38569
Location: Edinburgh, Scotland

PostPosted: Thu Feb 25, 2021 9:18 pm    Post subject: Reply with quote

I’ve only ever had JJs in my 6100 as they were I think in general the most affordable and I’ve blown one in I think 20+ years of owning it and I’ve not had one go noisy

The amp went back to Marshall when the HT fuse kept blowing in 2009 and they did a general checkup and retube then and it’s been fine since

I’m not the best frame of reference though as that amp is now only used once a month or so since 2015 when I moved away from my band *thick heavy tears of sadness*
_________________
MadeByMike.co.uk - Handmade Pedals and Custom Builds
Facebook - Twitter
Back to top
View user's profile Send private message Visit poster's website
NickS
.
.


Joined: 14 Jan 2008
Posts: 10602
Location: Nr. Basinggrad, UK

PostPosted: Thu Feb 25, 2021 11:05 pm    Post subject: Reply with quote

Thanks for the feedback. I just remembered I also looked at a pair of JJ E34Ls out of Matt's TSL and they were slightly noisy too.
Back to top
View user's profile Send private message
Doog
mid-century modem


Joined: 24 Apr 2006
Posts: 21338
Location: London

PostPosted: Fri Feb 26, 2021 8:26 am    Post subject: Reply with quote

My DSL50 only ever saw JJ EL34s and then JJ E34Ls, as they were supposed to have more headroom due to higher plate voltage or something.

I didn't have any problems with either, but this was like 10-15 years ago now; perhaps their QC has dropped off since.
_________________
andrew floss musics
Back to top
View user's profile Send private message
Mike
I like EL34s


Joined: 20 Apr 2006
Posts: 38569
Location: Edinburgh, Scotland

PostPosted: Fri Feb 26, 2021 8:37 am    Post subject: Reply with quote

Yeah I mean the last time Andy and I retubed our Amplifiers transistors were a new exciting technology
_________________
MadeByMike.co.uk - Handmade Pedals and Custom Builds
Facebook - Twitter
Back to top
View user's profile Send private message Visit poster's website
Doog
mid-century modem


Joined: 24 Apr 2006
Posts: 21338
Location: London

PostPosted: Fri Feb 26, 2021 8:49 am    Post subject: Reply with quote

Laughing

I remember blasting that sweet upper midrange sag into the faces of the cool cats at the ice cream social
_________________
andrew floss musics
Back to top
View user's profile Send private message
Progrockabuse
.
.


Joined: 14 Jan 2008
Posts: 4675
Location: Derbyshire

PostPosted: Sun Apr 11, 2021 5:31 pm    Post subject: Reply with quote

I've only used JJ tubes in whatever I've owned at the time. Don't think I've retubed the origin 20H yet. That's current sitting under the bed collecting mojo dust for when I get to be a weekend warrior in my 50's
_________________
Fingers or Pick?

A Fender into a cranked amp = life goals
Back to top
View user's profile Send private message
SAVEStheDAY
.
.


Joined: 18 Jun 2007
Posts: 158
Location: Chicago Burbs, IL

PostPosted: Mon Apr 12, 2021 2:11 pm    Post subject: Reply with quote

The SED winged C was probably one of the best out there, but they closed up shop several years ago. When that happened, Diamond amps went as far as to declare the EL34 dead, and switched all of their products to 5881's or 6L6's!

http://www.diamondamplification.com/5881-conversion

I've used EH 6L6's before and had luck with them, but I haven't tried their EL34.

Svetlana was the EL34 standard bearer for a while. The urban legend of the original block logo 5150 Peavey amps sounding better than the script amps was supposedly due to using Svetlana tubes instead of cheaper spec stuff. Those might be worth a try.
Back to top
View user's profile Send private message
dots
BADmin


Joined: 17 Apr 2006
Posts: 1016357
Location: on the move

PostPosted: Mon Apr 12, 2021 2:35 pm    Post subject: Reply with quote

JJ tubes all the way. with the exception of the '72 bassman 100 head which still had its original RCA valves, all my tube amps get the JJ treatment. before that, i went with groove tubes as they were in most newer fenders and guitar center tended to carry them in stock.

specific to EL34's, the only time i've a JJ fail was at a venue that blew up my TSL 100 -- blew the fuse, blew a power tube. killed the guitar player's amp of the band after me, too, so i was convinced it was a house power issue and not my amp or tubes. never had a problem with them before or since. i do not notice JJ's being any more or less noisy either.

admittedly, the last set of tubes i bought was a set of JJ's for the AC30 (EL84s) which i didn't have to bias. and now that i think about it, i haven't even so much as looked at the tubes in the prosonic mickie sold me last year. i've plugged it in like three times. since i don't have the stuff to bias it myself, i wouldn't change the tubes on that one right now anyway, but i do plan to use that amp in a future live performance... someday...
_________________
Check out Runway Runaway by Saturday's Child
robroe wrote:
im wearing my heart on my sleeve and my lips on my asssssssss
Back to top
View user's profile Send private message Send e-mail Visit poster's website
mickie08
.
.


Joined: 14 Aug 2006
Posts: 6160
Location: Carlsbad, Ca

PostPosted: Mon Apr 12, 2021 5:59 pm    Post subject: Reply with quote

pretty much always used JJs without any issue. Never had one go bad.
_________________
They say great minds think alike....Sometimes we do too...
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    ShortScale Forum Index -> Effects, Amps & Gear, Pedal Building All times are GMT
Page 1 of 1


Powered by phpBB 2001, 2002 phpBB Group

Anti Bot Question MOD - phpBB MOD against Spam Bots
Blocked registrations / posts: 728191 / 0