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Thanks. You beat me to the second question! I did wanna know if I could "upgrade" knowing that better op-amps exist. I've downloaded the book and will check it out later and added the site to my Audio

Kuba Ober wrote: RF RMS used ailing directly I mean IF of course. Kuba You don't NEED anything like an RF RMS voltmeter. or phase detector. A diode probe on a VTVM or very minimal scope will do just

My late father used to say "Why do it simply, when complicated works well too" (It looses something in translation) He also said "An engineer can do for two cents what any fool can do for $10.00"

Hello, Anyone have spares I have a way to test. I have three new 1000uf tabed radials that have been tested and work in 465M, and one old style 1000uf OEM tested. I also have one old style 18000uf

Er, guys, do you even know what you're arguing about? The discussion has degenerated into everyone saying this: for a noob, buying an unknown 7603 and having no access to equipment to properly test

I mean IF of course. Kuba

I don't have the clue what you're talking about :( Kuba

The input will look like a square wave even with a badly nonlinear vertical channel. The output "square" wave will then typically be much slower than the input one you fed to your system. With

Kuba Ober wrote: Gee Kuba, Anyone who is at all capable of making those kind of measurements would surely measure the input squa

On Wednesday 07 February 2007 13:56, you wrote: > Kuba Ober wrote: > > Kuba wrote: > > > > Well, if all you care about is *basically working*, then I agree. But > > then you don't need a 7603 either.

I was talking about "aligning" audio circuits, e.g. adjusting operating points of various stages, checking response, etc. Not about any sort of RF work. If I wanted to see a nonlinearity of a stage in

From: Kuba Ober Given that IIRC the OP doesn't have a spectrum analyzer, you'll want to get step or pulse responses of the audio gear you're testing. I can hardly see that going all too well with an

Kuba Ober wrote: Kuba, The origin of many instruments on eBay are government surplus, or surplus acquired by someone with no calibration skills. In the first case, metrology (instrument calibration)

I'd rather think that advising a newbie to buy an uncalibrated, unknown 7603 is sending him/her on a wild goose chase. A newbie will not have enough experience to easily ascertain whether something is

Given that IIRC the OP doesn't have a spectrum analyzer, you'll want to get step or pulse responses of the audio gear you're testing. I can hardly see that going all too well with an uncalibrated

Well, if all you care about is *basically working*, then I agree. But then you don't need a 7603 either. A random 7603 with random plugins will *basically* work, but most of the time it doesn't really

Anything that has got banana jacks on it *may* perform poorly for anything above a few kilohertz due to parasitics, unless you put the feedback path next to the chip. It does have a place to solder

Hello Chris, On A41 there is a chain from GND to +50V: R177 (35k7) - R176 (2k trim, Shield Voltage) - R175 (12k7). The slide of R176 is decoupled by C175 (0.01uF) to ground. Location R176 is what you

Chris Johnson wrote: If you go with an external graticule, the marking will be at least 1/4 inch away from the phosphor. That leads to a rather nasty parallax problem. Internal, or electronically

A lot of Tek CRTs are different only in how the graticule is marked. For example, if it weren't for the fact that the graticules are different, I could swap the pristine, very low hours CRT from my