Conrad Johnson Premier 5 resurrection.
Posted: Fri May 20, 2016 5:21 pm
Hi.
I am a longtime owner of a set of CJ Prem. 5 monoblocks.
Currently not working after being heavily modified by capable personnel. (or so I believed)
Reconfigured to Triode mode and changed all resistors to Beyschlag and caps to Mundorf silver in oil.
Also changed big caps to Rifa PEH169.
Have tried with substitute for EL34 - KT77, have understood that this was a direct replacement.
So, now I need to try a new road, having spent quite a sum of cash on improving these monsters.
I am thinking of separating the power section of the amplifiers and hardwiring these point to point.
The "other" part of the amplifier I was thinking to make new prints, with modern technology and modern prints.
The old prints are almost gone and it is no longer possible to purchase new replacements.
I have mailed the schematics and parts list for these amps in order to support this forum (couldn't find them here my selves)
I will be trying to gather information sufficient to produce the prints for the pre-part of the amps and find a good solution to hardwire the rest.
I am attaching a few pictures from the work on the amps so far.
Later, Lars
I am a longtime owner of a set of CJ Prem. 5 monoblocks.
Currently not working after being heavily modified by capable personnel. (or so I believed)
Reconfigured to Triode mode and changed all resistors to Beyschlag and caps to Mundorf silver in oil.
Also changed big caps to Rifa PEH169.
Have tried with substitute for EL34 - KT77, have understood that this was a direct replacement.
So, now I need to try a new road, having spent quite a sum of cash on improving these monsters.
I am thinking of separating the power section of the amplifiers and hardwiring these point to point.
The "other" part of the amplifier I was thinking to make new prints, with modern technology and modern prints.
The old prints are almost gone and it is no longer possible to purchase new replacements.
I have mailed the schematics and parts list for these amps in order to support this forum (couldn't find them here my selves)
I will be trying to gather information sufficient to produce the prints for the pre-part of the amps and find a good solution to hardwire the rest.
I am attaching a few pictures from the work on the amps so far.
Later, Lars