Rig-Talk

Guitars, Gear, Tone!
It is currently Mon, Dec 10, 2018 12:30am

All times are UTC - 5 hours




Post new topic Reply to topic  [ 3 posts ] 
Author Message
PostPosted: Thu, Nov 29, 2018 8:57am 
Offline
Hack
User avatar

Joined: Thu, Nov 29, 2018 8:55am
Posts: 13
Are you human?: 951
QQ: Anyone Bias an Engl Savage before? Does anyone know what's up with the cold biasing. I noticed the bias quite cold and the range is limited on the bias pot when I went to change out my 6550's to KT88's last night. I did some research, and looks like this is by design not only on the Savage but several other Engl model amps too, but wondering if there is a recommended percentage ENGL suggests, since you clearly can't bias up to 70% Are most people having to do resistor mods in their Engls or using some sort of standard percentage to bias their power tubes running them a bit cold all the time? I went ahead and set them for 50% for now, which is a bit hotter than was default. It seemed like the amps bias pot was all the way down to the minimum or very close. This is a brand new old stock Savage I picked up, so it's never had tubes changed. I just wanted to throw in some KT88s instead of the 6550 Engl Sovteks, which I prefer a bit more.

_________________
----AMPS-----

Engl Savage 120
Engl Invader II
Bogner Uberschall Rev Blue
Marshall JCM 900 SL-X
Marshall JMP 1987 - 1976
`64 Fender Super Reverb
Mesa Mark V
----Guitars-----
IBANEZ for Days


Top
 Profile  
Reply with quote  
PostPosted: Thu, Nov 29, 2018 9:51am 
Offline
Plank Cranker Wanker
User avatar

Joined: Sat, Aug 27, 2016 2:38pm
Posts: 2033
Location: Out of my mind
Are you human?: 951
I never messed with power tubes or biasing when I owned my Savage. Wish I had, because what your saying makes me think had I switched to KT88s and maybe biased a little hotter, that maybe would have "warmed" the amp up a touch. It is one of my all time favorite amps, but it was just a touch too stiff in response in the end, and I traded it. I can't help but wonder now based on what your saying here if those changes would have yielded the character I was after. I've found on a few other amps after trading the Savage, that I prefer tubes other than 6550s.

_________________
Good transactions with: harddriver, Hey_bert_whtcha_doin_bert, Tuckerbomb, krueger, ibzprestige, journeyman73, JerEvil, apophis, DragonCrestPC, hammered, Hardvalve, lowmantotempole, Mailman1971, FLYINRYAN11, bwgintegra


"Give me liberty, or give me Death" Patrick Henry


Top
 Profile  
Reply with quote  
PostPosted: Thu, Nov 29, 2018 10:45am 
Offline
Hack
User avatar

Joined: Thu, Nov 29, 2018 8:55am
Posts: 13
Are you human?: 951
I can say this, I had owned another Savage 120 with KT88's in it previously and the resistor must of been modded. I threw in the same exact power tubes that were in it, and I'm biasing this new one at about 50% which is running them a bit cool, and it is a lot tighter, stiffer, not as much break up, but the other Savage I had with the same exact tubes, had tons of breakup, was more brutal sounding, so must of been running them a lot hotter. I sent an email to Engl asking them about this and why they are limiting the range when the stock tubes are 42W 6550 Engl Sovteks. I do notice that the 6550's break up a lot more running them cool, so maybe that is the case with the Sovteks not needing to run them as hot as the KT88's. I'm just looking for a technical answer to this, because it seems from searching, Engl does this quite a bit with other models of their Amp also by design. If I need to have the resistor changed to open up the bias more, I can do that, but want to do my research before I take this into a tech to have that done.

_________________
----AMPS-----

Engl Savage 120
Engl Invader II
Bogner Uberschall Rev Blue
Marshall JCM 900 SL-X
Marshall JMP 1987 - 1976
`64 Fender Super Reverb
Mesa Mark V
----Guitars-----
IBANEZ for Days


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group - Terms of Use