Right. Time for an update then. Bought this off of "ebay kleinanzeigen" the other day and it showed up on my doorstep a few days back. That there is the twin EL-34 powered Suprem/Luxor 40 combo.
All in all,having checked it out,a combo with a different twist.
The cab in itself is made up of two separated enclosures. This then the upper part that contains the actual amplifier. Chassis is rather rudimentary to the build FWIW.
This particular unit had also seen the works of some previous "Mr Handyman". In short..repairs had been done in a less than satisfactory manner to say the least.
In turn jacks and a switch had been added to the faceplate. IOW...restoring to stock glory is out in this case.
I did however service the amp enough to get it up and running. Mainly to check it out,and this amp will distort when pushed alright.
This is a manner of putting the amps together that is a telltale for being Suprem. About as hardwired as it gets,and IMO a bit dangerous. The sheaths draped around the resistors is the only point of insulation,and..there´s about 400VDC running through some of them.
Speaking of which,after having handed the bias circuit som fresh e-lytes and a trimpot to make it adjustable i set bias to 36mA@495VDC in idle.
As noted the speaker enclosure is separate. As you can see it is also ported which i find a bit interesting. At the bottom there´s the reverb tank,and i seriously doubt that being untouched. The mere idea of installing a reverbtank together with a speaker sans any form of "bag" to prevent acoustic feedback is a no-no.
The giant green resistor in turn was installed in series with the speaker.
After handing the powerstage a few zener diodes vs the powertube screens asf i focused attention at the preamp and phaseinverter. All of the noval tubes had been replaced,sorry to say with the wrong types.
In turn..i really do frown upon the stock way of putting it together,hardwired or not,so a couple of tagstrips/soldersupports were installed as well. Recycled from an old Hohner actually.
This amp will not become a relay controlled twin channel unit. Each channel with three gainstages,and that brings that the preamp will get another noval socket to make it all come together.
One thing i REALLY frowned upon... them holes in the chassis there. The wiring of the amp was simply run straight through the metal sans ANY and all insulation. This of course has been remedied,and the real culprit here is that the wiring for the powertransformer was run that way too!! A dangerous proposition to say the least!
That said.
One modified Suprem 40 Combo coming up shortly guys.