Chris's Spec 2 restoration

[Gepetto]

Lee
I suspect the wire started that way. I notice the same thing in my old Realistic TM-1001. My conclusion is that these Japanese brands used wire that is half hard or not fully annealed. It breaks during the unwrap process sometimes. The good quality Kynar I have does not exhibit that problem. Yeah I have wire wrap gun and bits.

 

[laatsch55]

This unit came to me with no RCA jacks, and no backing plate, so we fabbed one.

Thanks for the explaination Joe.

 

[laatsch55]

On first try, it would not come out of protection. The right meter was deflected to 40 watts and the protect circuit held it out. Unplugged one board, wasn't it, unplugged the other board, wasn't it. It was a transistor on the meter amp board I had replaced, onl;y I had replaced an NPN with a PNP. Got the right one in there and tried again. Came out of protect but one protect relay is not closing. Tracing it now. The protect circuit in the Spec 2 can make ya dizzy tracing shit through it.

 

[laatsch55]

Ummmm........ the relay that wouldn't pull in is for the other transformer tap when running in 4 ohms. Ready to test .Warming up the AP.

 

[laatsch55]

Testing--1,2,3---4

 

[laatsch55]

THD & N at 1/2 watt output into 8 ohms, impressive.

 

[laatsch55]

Frequency response at 10 watts output into 8 ohms.
Equally impressive.

Gotta set the current limiters before we do a max output.

 

[laatsch55]

343/338 watts RMS into 8 ohms just before clipping.
I must say again, the Spec 2's are some well built and well engineered amps.

 

[laatsch55]

One more run of THD & N at 50 watts. Jani has just finished the faceplate. Time to button er up and see how the Horns like it!!

 

[laatsch55]

Done!! Chris, I think it turned out very nice you picked a good one to put some money into. A week on the horns and we'll call it good.

 

[laatsch55]

The test set, Phase Linear 3300 Ser II pre-amp, Onix CD-1 source, and the "2".

 

[laatsch55]

SERIOUSLY shaking down the Specster this morning!! Sounding VERY good!!

 

[laatsch55]

Final stress test today, final setting of bias and current limiters. Test music--- The Crystal method---"Vegas"

Getting pretty F&^%$#@ loud in the mancave. Gonna miss this amp. Being shipped to it's owner this week.