Other constructors have improved the grounding around the fets as well, but my approach is to test and fix problems as they arise rather than trying to fix everything at once. If it works good at 600w when i get there then thats good enough for me. If it goes up in smoke, expect some amusing pictures
ljfamps.jpg
1974. Amp on the left is a single 4-1000 and the little guy on the right is the 4-400.
Those were the days.
Last edited by kf0rt; 05-18-2012 at 06:07 PM.
i love the way the fronts looks so bare, but inside you know they're filled with goodness. ....and the wheels and cranks :D
Roi Tan cigars and Heathkits, too.Originally Posted by mw0uzo
Those were some fun times. The big amps then had variacs to adjust the power. As I recall, these adjusted the input power and could go from zero to whatever the max was. The variac was the "steering wheel" and you had to tune the amp. No broadband solid state stuff. RF deck up top and a power supply in the bottom. Plate voltage was in the kilovolts.
I once worked JY1 in a contest... Must have been 1973 or 4. Drake 4B line and a similar homebrew 4-1000 amp. Middle of the night and was just a kid.
WØGGC and WAØQLH: I still remember you guys.
Yeah, he's a fucking artist when it comes to this stuff... His beacon project was/is very exciting!
That beacon project is sooo close to being able to make a kit out of it. I have an ongoing long term mental block on learning some PCB design software to make the boards though :/ I have http://sourceforge.net/projects/pcb/ installed and waiting for some attention. Why can i not get my arse in gear to do it?!
Some more progress on the EB104:
Fixing all the PSU parts
Wiring up
It works :)
Is that big handwheel so you can go from a kw to deathray with the flick of your wrist?
When the government's boot is on your throat, whether it is a left boot or a right boot is of no consequence. — GARY LLOYD
The nation we live in is the nation we have built by design, each successive generation raising the wall of tyranny a little higher. - Chris Griffin
It's a surplus hatch wheel from a German U boat.
A clear conscience is usually a sign of a bad memory
RIP ALBI-W3MIV RIP RUSS-W5RB RIP BOB-VK3ZL
Indeed, it is!
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