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AUDIO FORUMS >> General Discussion and Support >> CCE mod on SE34-I (first gen) question
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Message started by Hajj on 10/20/10 at 08:42:46

Title: CCE mod on SE34-I (first gen) question
Post by Hajj on 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

Title: Re: CCE mod on SE34-I (first gen) question
Post by Hajj on 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.
:(
Help!

Someone?
Anyone?
:'(

Title: Re: CCE mod on SE34-I (first gen) question
Post by 4krow on 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

Title: Re: CCE mod on SE34-I (first gen) question
Post by Hajj on 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

Title: Re: CCE mod on SE34-I (first gen) question
Post by rmt on 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?

Title: Re: CCE mod on SE34-I (first gen) question
Post by 4krow on 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.