Many have seen those pictures which purportedly show the insides of the real(original) Gaincard. They are some funky looking parts. Not particularly impressive looking. Which leads me to my story. I spent the other morning going to a electronic supply store in order to build the inverted version of the gainclone. On a total whim, I ducked into a thrift store and found an early eightes technics tuner/receiver made in japan. It was metal and heavy and had a killer heatsink and ei transformer. It was $10 so I bought it basically to use the heatsink and maybe possibly the transformer. Well turns out, that the amp is littered with exactly, and I mean exactly, the same resistor used in the gaincard for the feedback loop. So, I quickly locate 2 22k resistors and desolder them. Well, gentlemen when I installed them in my nigc the thing took off! A perfect match! Long and short of it is I strongly believe that those parts in the original, are tremendously synergistic for the circuit. I've tried alot of different parts in the amps. I think the 47labs guy has a few tricks up his sleeve.
The one said:
which one?
http://www.vintagetechnics.com/receivers.htm
fwiw, nothing like that in the SA-303, or yamaha cr-240 of the same era.
It is the SA-450.The one said:
MSRP is Manufacturer's Suggested Retail Price; that $320 was back in '84. ten bucks at a thrift store sounds about right.
ofb said:
Can you post a pic of these old resistors. I love using AB carbon comps, but they do not work in every application.
Are these generic metal films?
George
Do they look anything like the input resistor in the picture below?
An externally hosted image should be here but it was not working when we last tested it.
KT said:
I may be wrong, but that looks like Nick's first GCs, the cylinders.
Or is it Flying Saucers? 😀
- Status
- Not open for further replies.