I was looking at some web page data this morning and I think I may have given a false impression in my post “You Never Really Know…” back in early November.
Continue readingHowever, Sometimes You Can Learn…
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Tag Archives: preamp
You Never Really Know…
Whenever I make a decision to start a project for this website, I never really know how that particular project will be received. And sometimes I get surprised. This is definitely the case with the new Source Selection Preamp.
Continue readingIt’s Truly Amazing
It really is amazing how much I can accomplish when suddenly I can’t work on all the projects which have been keeping me busy for the last month. The SSU assembly is complete and I’ve done some testing.
Continue readingAn Opportunity
As it turns out, there is a crew working on painting the exterior of my house today. Since I can’t work on many of my outdoor projects around the house, I thought I’d take the opportunity to get a little done on the source selector unit.
Continue readingSSU DC Checks Complete
It took a while but the DC checkout is complete and I’m finally ready to finish assembly on the Source Selector Unit.
Continue readingNo More Delay on the Source Selector Unit
The resistors for which I’ve been waiting showed up this afternoon. Time to get back to work on the Source Selector Unit.
Continue readingSmall Delay to the Source Selector Unit
As I said before, I decided perform the DC testing of the tube assembly for the source Selector Unit in the clamping fixture. But just as I started testing, I ran into a little problem.
Continue readingCompleted Tube Assembly
I got some time today to finish out the vacuum tube assembly of the source selector unit.
Continue readingI Can’t Believe…
I can’t believe I did that! How could I have been so thick headed to make this kind of mistake?
Continue readingSignal Sections Fully Wired
Yesterday I was bottling mead but today I got a chance to wire up the buffers and tie in the coupling capacitors. This completes installation of all the signal chain components. All that’s left on the assembly is the final power supply wiring.
Continue readingTube Wiring Progress
Between regular chores, gardening, and yard work today I managed to steal a little time to make some progress on the latest project. The gain stages for the source selector unit are essentially complete and I’ll begin working on the buffers as soon as I can.
Continue readingSource Selector Chassis in One Piece
This morning after installing the selector switch and all its pigtails in the chassis, I decided to install the base plate. The chassis in now all in a single assembly.
Continue readingWiring in Technicolor
So what does one do when needing to keep twelve signal paths clearly separated and easily identified in a chassis? Actually the answer is remarkably simple.
Continue readingSource Selector Unit Chassis Taking Shape
I’ve been waiting for some wire I needed for twisted pairs and a Fender style fuse holder. I really like these fuse holders. I find them sturdy, good looking, and reliable. I have some cheaper ones but I reserve those for brassboards, quick projects, test equipment, and the like. While I’ve been waiting for my deliveries, I’ve been populating the chassis.
Continue readingAbout that Volume Control – Part II
This topic is just the gift that keeps on giving. I first introduced the 4S preamp with the volume control on the output almost 12 years ago. And yet there still seems to be a tremendous number of misconceptions about the concept and performance ramifications of volume controls on the output instead of the input. This time the misunderstandings surround an output buffer cathode follower.
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