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CCE mod on SE34-I (first gen) question (Read 1091 times)
Hajj
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CCE mod on SE34-I (first gen) question
10/20/10 at 08:42:46
 
I opened up my SE34-I yesterday to carry the CCE mod on it.
Soldering iron, ready
Caps, ready

Just to be on the safe side, I read the posts again on the forum concerning the mod, and, as mentioned by ZYGI in one of the posts, the cap should go between pins 1 and 8.
But then I read a post made by Steve, stating that for the mod to work on the SE34-I.2 (the second gen SE34 integrated) there's a 1K resistor connecting pins 1 and 3 that needs to be removed first.
Looking at my amp, it seems that the SE34-I has that same resistor across pins 1 and 3 on the outer tubes (the ones wired in triode).
So my question is, should that resistor also be removed from the SE34-I, just like on the SE34-I.2 in order for the mod to work?
I read 4Krow did the mod on his SE34-I.
Below is a pic showing the actual internals as well as notes about the resistor and pins
Any input is more than welcome.
Thanks
Nick
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SE34-I_CCE_mod.jpg
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Hajj
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Re: CCE mod on SE34-I (first gen) question
Reply #1 - 10/22/10 at 09:02:38
 
Ok, my impatience got the better of me.
Not sure how to proceed for the outer tubes, I went and added the caps to the inner tubes (between pins 1 & 8).
Turned the amp on, played my favorite Diana Krall song, and......
OUCH!!!
The sound is distorted! horribly so! as if the tubes are overdriven.
Sad
Help!

Someone?
Anyone?
Cry
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4krow
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Re: CCE mod on SE34-I (first gen) question
Reply #2 - 10/26/10 at 03:01:40
 
Hajj, There are major differences between the first and second generations of this amp, so removing the resistor is not something that I did on my amp. And, as for the distortion, check the gain setting on the amp, as this will have a direct effect on the tubes being overdriven. I found that i had to lower the volume on my amp. Then as I wasn't satisfied with the outcome, I purchased a Nakamichi preamp so that I could have more control over the Decware amp.  It worked very well, and I am still using it that way.  Hope this helps.....Greg
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/BESL subs/Emotiva ERC3 CD player/BPT 3.0 power cond. PS Audio P500
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Hajj
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Posts: 33
Re: CCE mod on SE34-I (first gen) question
Reply #3 - 10/26/10 at 11:25:26
 
Thanks Greg!
I'll report back as soon as i add the caps, hopefully with pictures.
Regards.
Nick
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rmt
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NIbbelin NFX

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Re: CCE mod on SE34-I (first gen) question
Reply #4 - 10/27/10 at 01:38:48
 
On the first generation se34 does each of the power tube bases get a capacitor, 4 in total or just two of them?
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Select, CSP2 upgrade, Dec 685, DSRii, home built Nibbelin NFX w/DFR-8s, Klipsch RF-7, SE34.I, Zbox
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4krow
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Re: CCE mod on SE34-I (first gen) question
Reply #5 - 10/29/10 at 01:08:05
 
I added one capacitor for each tube, for a total of four. Each tube in this amp can be used alone or as a couple for the output. Either way, I thought that each tube should be modded.
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/BESL subs/Emotiva ERC3 CD player/BPT 3.0 power cond. PS Audio P500
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