Tubeworks design analysis
| QUALITY- FAIR
-Flux left on circuit card.
-Unsoldered pads on circuit board.
-Transformer retained by pop rivets.
-Solder wicked into multi-strand wires.
-"Fixes" soldered to back of board.
-No silkscreen or component designators.
-Hardwired components captivate board to
-Components underneath tube socket.
-Close tolerances to enclosure may cause
DESIGN- FUNCTIONAL BUT EXPENSIVE
-Two op amps used as flip-flop to toggle
-Eight large electrolytic capacitors.
-Metal shaft potentiometers.
-Three different potentiometer values used.
-No surface mounted components utilized.
-No high frequency roll-off, will damage
-High voltage in unit without earth ground or
-No U.L. Listing.
-High and low voltages in close proximity.
-Report non-compliance to FTC and Underwriters Laboratories so this product will be recalled from the market.
-Design alternative product which eliminates
ground loops in a safe manner and achieves
cost reductions by good design and
This post is in these categories: