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I use my 7L5 not daily but certainly weekly, for audio restoration and repair, and I love it. Inspection of the spectrum of distortion products, and for FM MPX purposes for which it is ideal: checking

Dave, I was also bidding on a 1L5 at one point, and it also went for (what I consider) real money. The 1L5 is more of an antique than the 7L5, though the 7L5 is pushing 50. The TinySA meets all my

I have restored and own a few tek 2465 scopes, now have a decision to make and looking for opinions. I have an otherwise good condition 2465 with U800 failure - power supply recapped a couple of years

Mark, I'll try that. It could just be a "perfect storm" of several parts contributing to the failure. Regarding one of these plugins, one of the custom ICs has one bad output (the 2^0 bit) which

Couldnt agree more Siggi! Cell technologies are completely different, a backup battery needs to trickle a small amount of current over a very long time. 18650 cells are not meant for that at all,

wrote: Yeah, it's not about the circuit current consumption, it's about the self-leakage of the cell. It'd be a very special 18650 that holds any sort of charge for years - WikiPedia quotes leakage at

I don't consider the 7L5 to be an antique, certainly not when compared to the?851A/8551A and the early Tek/Nelson-Ross/Pentrix SAs. Got a chance to actually use the Tiny SA last week; I had to

Barry, Change the resistors that are out of tolerance to see if that makes a difference since you say they are almost double the rated tolerance. A "bad" transistor can work in one area and not

One of my 7D14s was gating properly; however, the other one would not and, in the one that would not gate, I traced this down to the signal at U733A's "S" pin. The negative-going pulse was only going

This may be a unique fault and not directly useful for any future reference, but sometimes I enjoy reading how someone worked through a problem. Maybe someone will like to read this. I bought a 5A26

I've already emailed directly a few times...

Sounds like a pretty thorough determination of where the slow is. Horizontal bw is supposed to ~match vertical bw. Because they're pretty much the same circuits. But apart from a vertical amp in the

Yes all true - I *think* I may have worked out the problem - 512 ticks is only 4 revolutions of the motor. At that level the PWM (PID output) has to overcome the motor's initial reluctance to start

This is the exact reason i rejected the return requests with ebay. He is now selling it with this claiming its "good for a few yrs" https://www.ebay.co.uk/itm/133989860762 Not fit for purpose at all.

Hello, It is Taylor_D2010 here.. Just thought i would clarify a few things Paul (quadzillatech/M3VUV) has said. I sold him a Tek 2430 Scope on ebay. I mistakenly wrote 2430A, however all photos

Just my 2 cents. First 200V is sitting on top of 30V, so make sure to look at 30V (since your 200V is high). Look at voltage ripple on the big rectifier caps, maybe they are dried out. I see that they

Niels, I concur with Miguel's estimate. I've bid on a couple of these over the past few months on eBay, and they've all gone for more than $200 (US). The asking prices are upwards of $500, and that is

You're overthinking it. Most of the time you can tune a PID controller manually with way less effort then it would take to model the system mathematically and then prove that the model is correct. For

I would be interested too! Any photos? I would rather say around 400 euros. I've seen quite a few 7L5 sold for more or less 300 euros on ebay.

go to his website, pearl audio in Canada I think