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Hello,Do you have an electronic manual for FG504 ?Series before 0400000 Thank you,Petre

No affiliation. Has a good CRT and powers up. https://www.ebay.com/itm/202324932698? <https://www.ebay.com/itm/202324932698>

Mark, thank you for the hint. I've just found a photograph of an HP 1430A sampling head and the resemblance to the Soviet one is, shall we say, uncanny. I'm definitely going to do more research down

Oxidation of TO-3 transistor socket contacts have been noted in the past. If Q1418 is socket-ed, remove, clean the leads, and re-install.

Are you asking is the plugins from 7613 work with 7904 , asnwer is yes as long as its a 7000 series it should work. On Mon, May 28, 2018 at 11:56 AM, Jeff Urban<JURB6006@...> wrote: Will one

Let me be heretical and suggest using an HP 1430 series head. They can be made compatible w/ the S series but you'd have to roll-your-own interface. They also have a very strange cable. But, it's

Hi Jeff- family issues and life stuff managed to derail ALL of my projects ( the 422 pwr sply, the 475 ps with issues, other radio projects ), however I did manage to get the supply working without a

OK, thanks for correcting me. I unsoldered that ground link you circled, plugged P1445 back in, PDA lead still unplugged. I still get nothing on screen, and the reading at TP1423 is still low... It

It is going on the back burner. I am going to put it together for its own safety. I am out of ideas and last I looked so was everyone, so I might just use it as a 12 volts scope or something... If

Will one from a 7613 work ?

No, no, no. You do not unplug P1445. That stays put. Did you look at the picture I posted yesterday? I circled the part you need to UNSOLDER to open the ground to the HV Multi.

Thanks you for that clarification! OK, so I unplugged P1445 and the PDA lead, then powered up and gave it some time to warm up. Nothing on the screen even when beamfinder pressed, and TP1423 HV test

Yes, that is the connector for the HV lead that goes to the CRT Post Deflection Accelerator (PDA) electrode. The PDA is a conducting coating on the inside of the tube funnel that starts after the

Yes, that is the connector for the HV lead that goes to the CRT Post Deflection Accelerator (PDA) electrode. The PDA is a conducting coating on the inside of the tube funnel that starts after the

Is this the PDA? /g/TekScopes/photo/49286/2?p=Name,,,20,1,0,0 I was thinking it was the end of the HV mulitplier...

Now it's coming back to me. The 10H was a geometry shrink with reduced internal capacitances and higher fT so they could improve speed and lower power. Pinout issues aside, the MC10H109 might well

Post Deflection Accelerator. It is the Anode cap at the edge of the CRT's funnel usually to the left of the screen. -Chuck Harris Keith Ostertag wrote:

Had same fault many years ago,replaced the resonator cap with, from memory, a 0.001/1000V Styroseal (white) cap...should outlast the scope. John

Yes the 1330 manual is the correct manual for your unit. while the 1861 manual can be useful at times, as it pertains to your unit? you need to be very careful . Some circuits in the later manual are

Hi Keith, as others have already shown, that's not the one. Apparently I was mistaken. The ground lead doesn't come out from between the two boards. Here's a picture of what it looks like when the