My Fender Bassman was showing zero current at idle on one of the two 6L6GC tubes. I knew it was isolated to the socket because swapping the tubes showed the same zero current on the same socket. To make a long story short, the screen resistor (470 ohm) was fried. This is a 1 watt 470 ohm resistor that goes across pins 4 and 6 on the output tubes. The real culprit was a bad tube that would draw too much current.
Replaced the screen resistor and tube and all is good.
The symptoms of the bad tube/burnt screen resistor was low output volume and extremely low/none current across the 1 ohm cathode resistor.
If you have an iPhone or iPad, you need to get iMazing. This app will do a ton of things, but the #1 thing it will do is copy files to your iPad faster than iTunes. I mean minutes instead of hours.
The next thing it will do is browse your iPad/iPhone backups directly on your computer. Need to grab one file in an iPad backup? Now you can instead of having to restore the entire iPad contents.
It’s worth the cost.
I had all sorts of articles and books as well as electronics projects I had tried, but this simple Anderton book was the first one I really understood. For some reason I was able to understand what was in this book. I guess the delivery was really for a beginner.
I still think it’s a great book! Check it out!
Early days Fender Factory video!
My old trusty Radio Shack multimeter broke recently. I’ve had it for about 15 years and it has been a workhorse! I loved using it to build my stompboxes and debug my amps. The resistance function broke recently and it was time to find another. I have a number of meters but I wanted another one that was like my old Radio Shack meter. It had True RMS and other functions and it was accurate.
Well, I searched on Ebay and locally and I found a newer model with auto-ranging and true RMS and even a computer interface. I just received the meter and it ROCKS! It seems much better made and almost everything from the display to the information shown to the probes and the extra fuses make this a great deal for under $35! I have a hard time imagining a better meter at this price. I think you will probably like it as well for building stompboxes!