700/1 “Tim” WOPL driver board
- Thread starter AngrySailor
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- Victim of the record bug since age five
- Joined
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- 3,246
- Location
- Gaston, SC
- Tagline
- Victim of the record bug since age five
It means that I put them on there so the inquisitive folks on this forum could check the top to bottom symmetry on their full comp amps 
Thanks- I didn’t understand your purpose in this.
Knowledge increased, education continues…
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- No such things as bad days, just bad moments
I am old enough to have had my childhood in the 1950's. The general attitude among my parents and their social circle was that"Made in Japan" meant utter cheap junk. I had battery powered robots and cars given to me and can attest that they broke or stopped working soon after I began playing with them. But they were cheap to buy. If that were not so, I wouldn't have gotten them.
In the 60's "Made in Japan" began having less of a stigma. My belief is the proliferation of solid state devices and manufacturing in general along with R&D began to set "Made in Japan" as a hallmark of quality. And that was carried through into the 1970's which might have been the apex of Made in Japan" quality assurance.
And then "Made in Korea" had the distinction of being the cheapest and lowest of the low in terms of quality acceptance. Then their game was upped and "Made in Korea" began to be considered a viable alternate to "Made in Japan".
It was about then I began empoloyment in consumer electronics. "Made in Malaysia" made it's appearance as did "Made in Hong Kong", "Made in Singapore" and other "Made in's" that don't come to mind at the moment.
And now it is "Made in China" that's been getting the bad rap. But that population and manufacturing base is huge as is the global market so as far as I'm concerned, manufacturing quality ranges from extreme to extreme. My thought is that good stuff can come from there but foreign importers like North America, chose to buy what's most cheaply available and take their chances with failure rates.
I suspect that Japan's semi-conductor industry still produces viable products but the primo stuff is not exported due to price competion with the likes of China. Maybe only factory seconds or stuff not subject to quality control are sold abroad?
In the 60's "Made in Japan" began having less of a stigma. My belief is the proliferation of solid state devices and manufacturing in general along with R&D began to set "Made in Japan" as a hallmark of quality. And that was carried through into the 1970's which might have been the apex of Made in Japan" quality assurance.
And then "Made in Korea" had the distinction of being the cheapest and lowest of the low in terms of quality acceptance. Then their game was upped and "Made in Korea" began to be considered a viable alternate to "Made in Japan".
It was about then I began empoloyment in consumer electronics. "Made in Malaysia" made it's appearance as did "Made in Hong Kong", "Made in Singapore" and other "Made in's" that don't come to mind at the moment.
And now it is "Made in China" that's been getting the bad rap. But that population and manufacturing base is huge as is the global market so as far as I'm concerned, manufacturing quality ranges from extreme to extreme. My thought is that good stuff can come from there but foreign importers like North America, chose to buy what's most cheaply available and take their chances with failure rates.
I suspect that Japan's semi-conductor industry still produces viable products but the primo stuff is not exported due to price competion with the likes of China. Maybe only factory seconds or stuff not subject to quality control are sold abroad?
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Hi Andrew
I think I see the leads of the RCA410s poking through the sockets at the bottom. Can you confirm? If yes, good.
The body of the 10 ohm resistor you are measuring is far offset to the right and very close to the blob that is the connection of all the upper bank emitter resistors.
Are you sure there is really a connection to the blob for that resistor? Or is the right end connection intermittent to the blob?
Blob is one of my favorite words, use it nearly daily...
I think I see the leads of the RCA410s poking through the sockets at the bottom. Can you confirm? If yes, good.
The body of the 10 ohm resistor you are measuring is far offset to the right and very close to the blob that is the connection of all the upper bank emitter resistors.
Are you sure there is really a connection to the blob for that resistor? Or is the right end connection intermittent to the blob?
Blob is one of my favorite words, use it nearly daily...
I had a 10 Ohm resistor that was cracked right on a black color band, very hard to see, you may want to move it slightly.
Also, it is a routine maintenance technique on those original transistor sockets, when the transistors are removed, to pinch the connection points for the Emitter and Base pins with a small pair of wire cutters to push them back together.
Also, it is a routine maintenance technique on those original transistor sockets, when the transistors are removed, to pinch the connection points for the Emitter and Base pins with a small pair of wire cutters to push them back together.