DRRI Headscratcher Solved
Moderators: pompeiisneaks, Colossal
DRRI update ...
Hi to ALL -
Just a breif update on my DRRI - I am still waiting for my new octal bases to arrive and thought I would have a look at the amp this afternoon - I checked the tube sockets for any arcing - nothing evident - and then checked the tube pins on the rectifier and power tubes - there was some sort of corrosion on them which I thought ought not to be there - I gave them a clean up with a fine blade and then some fine emery paper and refitted them and set the amp up again and to my surprise and enjoyment I have just finished a 2 hour session without any of the previous volume/power dropout issues ... never missed a note .....
Still, I am going to do the full rebuild with the new point to point board when it arrives as well as fit the new octals etc ....
Checked out the net for some info regarding the corrosion and found this "the pins are actually prone to intermittent connections caused by the build-up of electrolytic corrosion products due to the pin being of a different metallic composition to the socket contact."
Something to keep an eye on for sure .....
Cheers all -
frostbite.
Just a breif update on my DRRI - I am still waiting for my new octal bases to arrive and thought I would have a look at the amp this afternoon - I checked the tube sockets for any arcing - nothing evident - and then checked the tube pins on the rectifier and power tubes - there was some sort of corrosion on them which I thought ought not to be there - I gave them a clean up with a fine blade and then some fine emery paper and refitted them and set the amp up again and to my surprise and enjoyment I have just finished a 2 hour session without any of the previous volume/power dropout issues ... never missed a note .....
Still, I am going to do the full rebuild with the new point to point board when it arrives as well as fit the new octals etc ....
Checked out the net for some info regarding the corrosion and found this "the pins are actually prone to intermittent connections caused by the build-up of electrolytic corrosion products due to the pin being of a different metallic composition to the socket contact."
Something to keep an eye on for sure .....
Cheers all -
frostbite.
Re: DRRI Headscratcher Solved
Yes sometimes dissimilar metals can react to each other causing electrolysis.
A small voltage develops and corrodes the metal.
A small voltage develops and corrodes the metal.
Tom
Don't let that smoke out!
Don't let that smoke out!
DRRI UPDATE ...
Hi - I just finished my DRRI Rebuild and finally now have a DR that is worthy of owning .... It is so much better than what Fender are passing off as a 65 Deluxe Reverb Re-Issue ....
I will never again even think about buying a new Fender amp ... after having all the troubles with their inferior rubbish I am done with them. I can now enjoy my DR as it was intended - trouble free for years to come.
To anyone contemplating doing the upgrade to the Original AB763 Layout/Schematics with the fiberboard/turretboard setup, GO FOR IT.
You will not regret doing it - if you like your DRRI, then you will LOVE the DR Rebuild ...
Very happy with the NEW AMP, Oh, and I installed a Celestion Vintage 30 speaker - Excellent match up for the amp innards ...
Cheers -
frostbite
COOMA NSW
I will never again even think about buying a new Fender amp ... after having all the troubles with their inferior rubbish I am done with them. I can now enjoy my DR as it was intended - trouble free for years to come.
To anyone contemplating doing the upgrade to the Original AB763 Layout/Schematics with the fiberboard/turretboard setup, GO FOR IT.
You will not regret doing it - if you like your DRRI, then you will LOVE the DR Rebuild ...
Very happy with the NEW AMP, Oh, and I installed a Celestion Vintage 30 speaker - Excellent match up for the amp innards ...
Cheers -
frostbite
COOMA NSW