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RG100G3 pre amp, blocking distortion, help please

 
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belleraphon88
RM20


Joined: 09 Feb 2013
Posts: 2
Location: South Africa

PostPosted: Mon Jul 08, 2013 12:32 pm    Post subject: RG100G3 pre amp, blocking distortion, help please Reply with quote

Hi
My RG100G3 gets blocking distortion when i turn the level up on the dirty channel.
I know its the pre amp coz ive isolated it from the power amp and the problem is still there.
Had it at a tech recently that fixed my power amp, according to him all the components are fine, power supply, etc.
Any help would be appreciated
thanks
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Mattfig
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Joined: 22 Jun 2010
Posts: 5572
Location: Hurtling through space on a wet rock.

PostPosted: Mon Jul 08, 2013 1:25 pm    Post subject: Reply with quote

Try swapping out the preamp tubes one by one...Sounds like that's your issue...I dead triode perhaps?
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belleraphon88
RM20


Joined: 09 Feb 2013
Posts: 2
Location: South Africa

PostPosted: Thu Jun 19, 2014 8:33 am    Post subject: Reply with quote

The amp has only one tube and it is in the power amp.

The only way to play that amp is to have the level on the pre amp at almost 0 and then crank the master volume. otherwise its al moosh etc.

When the amp did work i could turn the level up on the pre amp on the gain channel and ot sounded pretty rad, lots of saturation.
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tschrama
RM100


Joined: 04 Jun 2014
Posts: 190
Location: Netherlands

PostPosted: Thu Jun 19, 2014 12:00 pm    Post subject: Reply with quote

It still might be that one preamp tube, that for some reason gets biased too hot or to cold. It happens with tube swaps or electrolytics going bad. Did you recently swap the tube? Did it allways sound like this, or did it just occured recently?
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