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I have both of these and would like to get these replaced with the new style of chip that does not need the back-up battery. The (real) 2465B is still good. I do not know how long it will keep the

I fully concur, Ozan. Raymond

I partially agree with Goran's statement, but only partially because, as written, it neglects an important subtlety. It is certainly true that a large first-stage gain suppresses the noise

I agree sometimes stepping back and looking with fresh eyes helps. Let us know when you want to bounce off ideas again. Ozan

Goran wrote: "If you wish to design a multistage amplifier with low phase noise factor you should maximize the first amplifier gain and the noise factor contribution from the following stages will be

The following photos have been uploaded to the Sampling with 3S2 ( /g/TekScopes/album?id=261250 ) album of the [email protected] group. * 0325211621-00.jpg (

I bought ten BFR505 transistors which are supposed to be faster than 2N2369's. Unfortunately they come in SOT-23 packages (i.e. smaller than a mouse turd). I had a fun time installing one into my

Gentlemen, I have been following this splendid discussion with great interest. There are so many ways you can discuss amplification and noise, negative feedback or no feedback, hopefully not positive

Barry, Yes! In fact AGC is negative feedback. GOD Bless and Thanks, rich!

So is negative feedback more analogous to AGC? Thanks, Barry - N4BUQ

Barry, The sighs were because the idea that negative feedback in an amplifier reduces noise in the output signal, whether that noise is present in the input, or is introduced elsewhere in the

Just wanted to say thank you for continuous support. I haven't abandoned the ship just yet but I realised I spent way too much time on a scope project and haven't done enough paid repairs to bring the

Yes, I understand how these work. My question was more about why the explanation where noise from the first stage of an amplifier is fed back (negated, inverted, or, ?) to the input which seems much

Hi Barry, No sighs from my desk, your question is a good one. I think these modern headphones work in the following manner, a small amount of noise comes through the leather in your headphones. At the

There certainly is, in a way, between the title of this thread and noise-canceling headphones: In noise-canceling headphones, a fraction of the outside environmental noise is in anti-phase added to

The solution with reduced value of R693 seems to have disadvantages also, otherwise Tek would have done so I think. That might be the reason that P600 has been introduced to enable/disable interdot

Is there an analogy between this subject and the way noise-canceling headphones work? I'm sorry if that's a silly thing to introduce into this conversation but it might help me understand this a bit

I never knew sighing in chorus existed, defies relativity's simultaneity concept. Raymond

Those TD's should work. Just go through the applicable adjustment procedure in the SM, no special equipment needed. Results will be better than by matching. Raymond

I really don't see a manufacturing defect. Your image shows the underside (base) of the package, with its glass(-like) lead feed-throughs. Packages are purchased by the transistor manufacturer