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Guitars, Gear, Tone!
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PostPosted: Fri, Jan 20, 2017 4:05am 
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Hack

Joined: Fri, Jan 20, 2017 3:42am
Posts: 5
Hi everyone,

i am new to this forum and have some questions concerning my (beloved) Einstein.

Channel 1 with all 3 Settings is o.k. but Ch.2 has a much higher noise level (Grundrauschen),

quite independant from the gain setting. Ch.2 is also much more muted than Ch.1.

Seems to me that the source of the problem is on the preamp side, since Ch.1

is perfectly o.k. and VERY loud.. :)

I read on the Diezel homepage that Valve 2 is only responsible for Ch.2,

is there a chance that replacing Valve 2 will solve the problem?

And in case that will do, what tube is recommended there and do i have to

adjust bias currents or so?

Thanks in advance for comments

Regards
Holger

P.S. If there are some o's or i's missing its my fuc... laptop, not my poor diction.... i hope


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PostPosted: Fri, Jan 20, 2017 6:17am 
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Hack

Joined: Fri, Jan 20, 2017 3:42am
Posts: 5
Und was heisst das 'Hack' unter dem Autor?

Dass man neu ist?

Sorry,

what does that 'Hack' mean under the Authors name?

Regards

Holger


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PostPosted: Fri, Jan 20, 2017 1:11pm 
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Apprentice NOOB
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Joined: Sun, Jan 23, 2011 2:00pm
Posts: 131
Certainly worth a try. Ruby 12AX7 AC5 HG+ or similar high grade.
V2 is used solely by channel 2
No rebiasing required for preamp tubes.

If you have any 12ax7 that you know is good or brand new it will enable you to eliminate the tube as the source of the issue.

Unplug amp from power before swapping any tubes etc....

_________________
Graham. West Yorkshire. UK

Diezel Einstein Combo ( K100 open back)
Reverend Rocco Bug Eye with Rio Grande BBQ bridge
ESP GL-56 George Lynch Strat relic with Arcane Mr Scary in Bridge
Organic Artist Hollow Body with BKP (wound for the guitar)
Tanglewood / Sanden Masterbuilt TSR2
Reverend Rocco Sky Blue, maple neck
Gibson Les Paul Custom 1971 Cherry Sunburst
Delay, Wah, Phase 90. All OD and Boost pedals made redundant by Einstein.
Bad attitude towards turning down volume.....
http://www.motusweb.net


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PostPosted: Sun, Jan 22, 2017 8:21am 
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Hack

Joined: Fri, Jan 20, 2017 3:42am
Posts: 5
Thanks Graham,

one Question though:

I read some Posts below that Peter Diezel recommends a

V2: 12AX7-B High grade selection on B-side 678

Whats the Difference between the Tube you mentioned (12AX7AC)

and the tube from Peter?

Would this e.g. be o.k.:

http://www.tubeampdoctor.com/de/shop_TA ... ected_2192

Or can we get them somehow fom Diezel Amp. directly?

Thanks
Best Regards
Holger


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PostPosted: Sun, Jan 22, 2017 10:55am 
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Joined: Sun, Jan 23, 2011 2:00pm
Posts: 131
I have no idea ref the specifics of the 678 tube, other than it is recommended by Diezel.

I used the Ruby 12AX7AC5 HG+ for years and bought them from here. This was at the time the Diezel recommendation. I have owned Einstein since 2011.

http://www.banzaimusic.com/Ruby-Tubes-1 ... -PLUS.html

Don't forget the HG+ part as this is the selection process indicating Highest grade selection from Ruby.

2015 I got some 678 from Valve Queen (USA) on Peters recommendation. Shipping was fast and trouble free.

http://store.valvequeen.com/ruby-ac5-12ax7-678-diezel-selected

I think its basically the same tube but with further selection to meet Diezel criteria above and beyond what Ruby have already done.

I have had the 678's in V1 and V2 for over 2 years now and they are great. Amp works hard, gigging most weekends. I haven't swapped them out yet because it just sounds good and I have experienced zero issues.

Hope that helps.

G

_________________
Graham. West Yorkshire. UK

Diezel Einstein Combo ( K100 open back)
Reverend Rocco Bug Eye with Rio Grande BBQ bridge
ESP GL-56 George Lynch Strat relic with Arcane Mr Scary in Bridge
Organic Artist Hollow Body with BKP (wound for the guitar)
Tanglewood / Sanden Masterbuilt TSR2
Reverend Rocco Sky Blue, maple neck
Gibson Les Paul Custom 1971 Cherry Sunburst
Delay, Wah, Phase 90. All OD and Boost pedals made redundant by Einstein.
Bad attitude towards turning down volume.....
http://www.motusweb.net


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PostPosted: Sun, Jan 22, 2017 11:06am 
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Diezel Amplification
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Joined: Sun, Jul 02, 2006 5:43am
Posts: 4690
At the moment we use the Mullard Reissue CV4004 for V1.
It´s doing a great job.


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PostPosted: Sun, Jan 22, 2017 1:20pm 
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Hack

Joined: Fri, Jan 20, 2017 3:42am
Posts: 5
Hi,
thanks for the posts,
can i get the replacement tube via

service@diezelamplification.com ?

Best Regards
Holger
@Peter Diezel: Viele Grüße aus Unterfranken, bin sehr zufrieden mit dem Einstein.


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PostPosted: Mon, Jan 23, 2017 10:39am 
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Diezel Amplification
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Posts: 4690
Got your email, thanks.


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PostPosted: Wed, Feb 01, 2017 3:01am 
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Hack

Joined: Fri, Jan 20, 2017 3:42am
Posts: 5
Hi,

my Einstein is healed!

I was in Bad Steben and Peter did some things i didn't understand,

and its better than new. :)

Also got to know Einstein himself.

Thanks everyone, especially Peter.

Regards
Holger


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