Viewing last 25 versions of comment by BigBuggyBastage on image #1340742

Add some fluorescent fixtures and a few duplex outlets, it looks almost exactly like my bench! :D]


 
Seriously, I ♥ this, so friggin' much.



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[@gallagher117":](/1340742#comment_5773670
)  
I have some Heathkit and HP instruments with PCBs from the late-1950s through early-1960s. Granted, the masks were hand-cut, and the material isn't exactly high-quality FR4, but it gets the job done. Depending on the year, who made it, and what the instrument does, they can be all-tube, some tubes plus silicon (or selenium [yuck!]) rectifiers for their B+ supply, or something crazy in between. The ONLY application I've seen vacuum tubes *_and_* integrated circuits on the same board is my Acoustic tube amp from the mid-1980s. It uses an LMxxx on a heatsink to drive the reverb tank (I think), which just spared the designer from having to use something like a 12AU7 as a cathode-follower.


 
Heh, a rather sick side-joke kinda slipped into my mind: the PCBs could mean both "printed circuit boards" and "polychlorinated biphenyls", because I'm fairly sure at least one of my instruments has both! lol


 
**Consumer-grade** PCBs really took off in later All-American Five radios - anything the manufacturers could do to save a penny, they jumped on. I just checked with my Beitman guides, and it looks like PCBs were in at least a few popular models as far back as 1955, perhaps further.

Add some fluorescent fixtures and a few duplex outlets, it looks almost exactly like my bench! :D]

Seriously, I ♥ this, so friggin' much.



"@gallagher117":/1340742#comment_5773670
I have some Heathkit and HP instruments with PCBs from the late-1950s through early-1960s. Granted, the masks were hand-cut, and the material isn't exactly high-quality FR4, but it gets the job done. Depending on the year, who made it, and what the instrument does, they can be all-tube, some tubes plus silicon (or selenium [yuck!]) rectifiers for their B+ supply, or something crazy in between. The ONLY application I've seen vacuum tubes *_and_* integrated circuits on the same board is my Acoustic tube amp from the mid-1980s. It uses an LMxxx on a heatsink to drive the reverb tank (I think), which just spared the designer from having to use something like a 12AU7 as a cathode-follower.

Heh, a rather sick side-joke kinda slipped into my mind: the PCBs could mean both "printed circuit boards" and "polychlorinated biphenyls", because I'm fairly sure at least one of my instruments has both! lol

*Consumer-grade* PCBs really took off in later All-American Five radios - anything the manufacturers could do to save a penny, they jumped on. I just checked with my Beitman guides, and it looks like PCBs were in at least a few popular models as far back as 1955, perhaps further.

Add some fluorescent fixtures and a few duplex outlets, it looks almost exactly like my bench! :D]

Seriously, I ♥ this, so friggin' much.



"@gallagher117":/1340742#comment_5773670
I have some Heathkit and HP instruments with PCBs from the late-1950s through early-1960s. Granted, the masks were hand-cut, and the material isn't exactly high-quality FR4, but it gets the job done.

Heh, a rather sick side-joke kinda slipped into my mind: the PCBs could mean both "printed circuit boards" and "polychlorinated biphenyls", because I'm fairly sure at least one of my instruments has both! lol

*Consumer-grade* PCBs really took off in later All-American Five radios - anything the manufacturers could do to save a penny, they jumped on. I just checked with my Beitman guides, and it looks like PCBs were in at least a few popular models as far back as 1955, perhaps further.