Jeff Litt.
New Member
Hello Everyone,
To start out, I have visited this forum over the last 3 years for research and information. I finally made an account to post some information about my equipment. This site has been very helpful in research and decision making on my equipment / tube selection.
I have a pair of Dynaco MKiii amps that have Constant-Current Differential-Amplifier (CCDA) by ADI conversion. They have also been converted to run on EL34's. I have posted a few pictures to go along with the post. There is more documentation on the ADI conversion, it was just to much to post.
These amps belong to my father and about 4 years ago he gave them to me. He was tired of messing and constantly adjusting them. He switched to a Lynn integrated amp. As the story goes, he purchased the original Dynakit back in the 60's and built the factory amp. He wanted to upgrade the amps and did the CCDA change, plus converted it to EL34's. I guess KT88 where getting hard to find good quality in the 70's. The person that did the upgrades also took some liberties in upgrading the design how they sought best. It's made it a little challenging for me as the amps do not match to original Dynakit or ADI conversion prints.
The 2nd year of having them I lost sound out of one of the amps. Due to their age I decided it was time to recap them. I successfully recapped the first one and found the cause of sound loss (broken resistor on the 400V path). The pictures here are of the other amp, not re-capped yet. I will be going through it here over the next weeks to recap.
Thanks,
Jeff L.
To start out, I have visited this forum over the last 3 years for research and information. I finally made an account to post some information about my equipment. This site has been very helpful in research and decision making on my equipment / tube selection.
I have a pair of Dynaco MKiii amps that have Constant-Current Differential-Amplifier (CCDA) by ADI conversion. They have also been converted to run on EL34's. I have posted a few pictures to go along with the post. There is more documentation on the ADI conversion, it was just to much to post.
These amps belong to my father and about 4 years ago he gave them to me. He was tired of messing and constantly adjusting them. He switched to a Lynn integrated amp. As the story goes, he purchased the original Dynakit back in the 60's and built the factory amp. He wanted to upgrade the amps and did the CCDA change, plus converted it to EL34's. I guess KT88 where getting hard to find good quality in the 70's. The person that did the upgrades also took some liberties in upgrading the design how they sought best. It's made it a little challenging for me as the amps do not match to original Dynakit or ADI conversion prints.
The 2nd year of having them I lost sound out of one of the amps. Due to their age I decided it was time to recap them. I successfully recapped the first one and found the cause of sound loss (broken resistor on the 400V path). The pictures here are of the other amp, not re-capped yet. I will be going through it here over the next weeks to recap.
Thanks,
Jeff L.
