Converting a Seeburg jukebox for free play operation is a popular modification for home use. It eliminates the need to find coins and eliminates coin gear jams. The “old” way to free play a Seeburg was to bend the little ramp inside the CCU so that selections were not cancelled as the CCU wheel rotates. […]
1950s Seeburg free play Read More »
Here is something that you will not see everyday, an NOS NIB NEW Globe-style Arcturus blue-glass 071A audio output tube. Type 071A is also known as 71-A, 71A, 171A, 271A, 371A. This tube has the star-logo on the top of the glass bulb with 071A inside the star logo. Engraved base reads “ARCTURUS – No.
NOS NIB NEW Arcturus Blue 071A tube (71-A) Read More »
This is one of many examples where tube testing requires experience to properly evaluate any tube. In this situation, using a tube tester would yield a completely wrong answer. These tubes were factory marked as E283CC, but are actually 12AX7A tubes. Hence, if you tested them in your tube tester using E283CC settings, you would
when E283CC tubes are actually a 12AX7 Read More »
by Bob Putnak, ©2010. Of all the subjects that I have discussed, I receive the most inquiries about my HP Officejet “scanner system failure” repair article. That article also fondly mentions the old-school Laserjet’s, and I had several inquiries about repairing them. These old dinosaurs are still useful to any small business that prints traditional
HP Laserjet 4L – 4P refurb and repair Read More »
This article discusses repair and calibration of the Hickok 6000 tube tester. Models 6000A and 6005 are the same with only minor feature differences that are not relevant to tube test calibration, therefore the discussion is applicable to those models as well. Serious electrical voltages are present, repairs should only be attempted by a qualified
Hickok 6000 calibration Read More »
