Ładny sprzęt. Wykonanie tradycyjne a nie SMD wszechobecne. Maszyna ma swój urok. Pozdrawiam.

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Hello, not sure how much services you have done to your HP 3585A, but I recommend you replace all them electrolytes in the power supply area. I have the same unit, them caps are dry and stresses the power transformer! also make sure you apply new thermal compound on the power transistors! otherwise this will run HOT! thanks!

@garyramsey4275

12 күн бұрын

@@thevintageaudiolife I prefer to replace parts when I find them to be defective. To my mind, arbitrarily replacing good capacitors seems to be attempting to solve a problem which doesn’t actually exist.

those little tones at -70dbc should not exist. they seem to be about 20khz apart and not harmonically related to the 1MHz input. Either the 3325a or 3585a still has a problem.

@garyramsey4275

23 күн бұрын

Yes, you are correct. When I use an analog oscillator as my signal source, those spurious signals disappear, so the problem isn’t in the 3585A. I am aware of this situation, it is a problem in the fractional-N PLL circuit on my 3325A. That repair may be coming up in a future video.

Gotta love these fairly simple repairs. Many of these sub-assemblies contain custom HP unobtanium parts that can only be acquired from a doner unit. I have several units that I have simply replaced the entire sub-assembly because I didn't have the test gear to properly troubleshoot the issue. I'd love to get my hands on a 3585A eventually.

@garyramsey4275

23 күн бұрын

I wanted one since about 1980. Only took me about 44 years to get it!