NAD - Jansen Liberator 9-180
This arrived today :)
I needed a more powerful amp, and I like tube amps and I like NZ made Jansens.
I emailed a couple of techs to see if they knew the whereabouts of one of these and to my surprise the one in Wellington did.
It was languishing unused in a cafe. They were using it as a PA and it had broken down.
I organised a swap for a SS Jansen PA head I found on trademe - far better suited to playing quiet music for hours on end, and still has that classic look they wanted.
The tech did the swap for me and has worked on the Liberator on and off over the holiday season. He replaced caps, some tube sockets and bits and pieces.
Big heavy transformers in this.
Unfortunately someone has removed the tremolo circuit board completely and cut a hole in the top for an extra cooling grille :hmm:
Also needs new handles and the faders on the front need cleaning because they're a bit noisy.
This mid 1970's Liberator is 200W from 4 KT88s (or 6550s).
It is running with 700V on the plates - a bit over spec - and I have ValveArt KT88s installed.
Sounds great :) It has a real sense of power even at low volumes and the tone has a bit more 'tang' compared to my Bassman. Sounds great with my 4001 :)
I'm glad you're enjoying your new toy. Have fun with it and remember never run it without a speaker system connected.
A bit of an update.
I've cleaned up most of the noise in the faders using compressed air and CRC2.26
I've replaced the handles.
The original handles had only 4 screws each for a c.25kg amp and the case is chipboard...
So I blagged a pair of old Penn handles from a friend and cleaned them up using Autosol.
Then I reshaped the holes (carefully! - measure twice, cut once), filling in with shaped woodblocks and fillets and re-gluing the vinyl.
The new handles have 10 screws each and I hope they will deal with the weight of the amp better.
Cosmetically, it would be nice to re-chrome the corners at some point.
No luck sourcing a replacement tremolo circuit board, so it is likely I'll get the circuit built up next time the amp goes to the tech.
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