Category Archives: Project

A Quick Overview of Tube Testing…

Now I mention a number of times now of letting the equipment be the final arbitter of the tube’s merit. This is simply because some circuits are not super critical to the tube’s “measured” value, and there is no question there are some pieces of equipment that are very critical of having even acceptable tubes from the tester not being good enough for the circuit (I have a Dumont scope like the one in the “Raj Mahal” which is that way.). Conversely I have a tube radio chassis that has all 5 of it’s tubes test below the question mark, and yet reception is very strong, sound quality is as good as a typical table radio and everything works as it should. Continue reading

Posted in Amplifier repairs, Auditorium equipment, Cathode Ray Tube, CRT, Homebrew, Project, recievers and tuners and guitar amps, Repair, Stereo amps, Tube tester repair, Uncategorized, updating tube tester | Tagged , , , , , , , , , ,

Construction of a Guitar Amplifier Worthy of the Effort

Now to be clear- this amp was not going to be a total ripoff of their design, that was not the intent, but rather this amplifier is an Homage to their design and to see if it could be accomplished with what I had available- with a few important tweeks and differences, their design only gave a starting point. To say the least, this amplifier is a “one of a kind” largely because many of the parts I used were the only parts I had on hand. Any others I build in the future will be different- even if inspired by other amps manufactured by the big name companies. Continue reading

Posted in Amplifier repairs, Auditorium equipment, Homebrew, Project, transformers, Uncategorized | Tagged , , , , , , , ,

Table Saw Repair

I am crossposting this from one of my other blogs because it is an electrical repair of a fairly common household tool. This can save you money if you happen to have one of these saws, or similar. Continue reading

Posted in Project, Repair, Tools and Machinery, Uncategorized | Tagged , ,

Some information on CRT’s- Honest and Accurate Unlike Much of What You Read on the Topic Elsewhere.

As color TV set prices dropped, those tubes made roughly after 1973 no longer had a “frit” and were no longer garage rebuildable. My dad actually worked with a fellow who did rebuild the CRT’s in his garage, and I met him and talked with him about the process back in those days. With the introduction of the Sony “Trinitron”, which actually still had the 3 electron guns, but had an assembly that worked slightly different as a couple of tube elements that had been 3 seperate items each in RCA, GE and others CRT’s and remained so, were now handled by one element instead of three in the Sony products. These Trinitrons were not garage rebuildable. and their introduction also corresponded to the demise of many neighbornood TV shops as sets got cheaper and repair parts got more expensive and labor became a major factor of a repair cost. Color CRT’s were rebuildable even with fused glass parts or burned phosphor coatings, but it required the facilities of on par with a factory to do so- which remained possible into the early part of this century- and they were not cheap. Continue reading

Posted in Cathode Ray Tube, CRT, Frit, Homebrew, Project, Recycling, Uncategorized | Tagged , , , , , , , , , ,

Triplett 3212 “Tube Analyser”, Tube Tester

Other updates are the replacement of the copper oxide rectifier with a silicon rectifier (1N4007), and replacement of the old paper cap with a polyester capacitor of the same 0.1 microfarad capacitance at 630 WVDC. The copper oxide rectifier is safer than selenium, but still has significant reverse bias leakage, the silicon diode has much less leakage, so a significant upgrade to performance. Continue reading

Posted in Project, references, Stereo amps, Tester repair, Tube tester repair, updating tube tester | Tagged , , , , ,

Just Some Idle Notes

Other chargers have been attempted for charging “Primary” Alkaline cells, but they too suffered various limitations, from undercharging the cell so it had minimal capacity, or they suffered from the same failures from heat of the “Alkaline Charger”- Namely leakage and small explosions. This is usually the result of a lack of diffusion and localized heating within the cells. The cycling will hopefully address this issue so effective charging will occur. Continue reading

Posted in Alkaline Charging, Alternative Energy, Battery charger, Bedini, Capacitive charger, Capacitor charger, charger, Homebrew, Incandescent light bulbs, lead acid batteries, Project, Renassaince, Reverse Current charger | Tagged , , , , ,

There will be more to come…

I’ll be back…. Continue reading

Posted in Alternative Energy, Alternative Energy System, Project, Uncategorized