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Hello, Since the thread about cheap noise source on the other list got very interesting and I was doing some repairs on my HP 8970A and 8970B I would like to ask some questions which I am not sure how

Thanks to all that replied and helped me find a counter. I settled on an HP 5342A from a list member. Thanks Gary K4FMX

No, not Avantek. The IC (just the chip) is supposedly still in production at Keysight, but I have no idea if it's still available in that package. I think it was designed in the 1980s. Vladan

Could this be an Avantek part after spinning out from HP?

Just a guess, in case you can't find the data sheet: Vd=7V Id is adjusted for 150mA max. or leave it at Idss if it's less than 150 mA. Vladan

The IC looks like an old HP traveling wave amplifier, but what’s around it does not look like it was made at HP. The gate voltage (bottom left pin with the wire going to the feedthrough) is quite

Hello Tam, thanks for your kind offer. You can contact me via dk1vi at darc.de Ernst

My data base shows that this transistor has been replaced by 1853-0059. PNP, VCE-55V, IC-5A, PD-150W, FT-3MHZ, SI TO-3. -- This email has been checked for viruses by AVG antivirus software.

Hello, I am looking for the HP 1GG7-4210 MMIC amplifier datasheet or at least the +VD and -VG values for this amplifier Best regards eric

IIRC, the film used for LED displays was not only fairly monochromatic, but polarizing.? The idea was that light going through from the outside would be polarized, change polarization when bouncing

Pay especial attention to the alphabet soup past the part number, and for that manufacturer, try to track it down to a specific outline in the data sheet.? Not all manufacturers give you a link to a

I have a few C# examples which work with quite old devices. Please email me OFF list, as these are customer code and I cannot post them publicly. Tam With best regards Tam HANNA -- Enjoy electronics,

Perhaps the best thing might be to make a new, dual footprint so that either narrow or wide will fit rather than overlaying one on another – which will always produce DRCs. It’s rare that us

Hello Yves, thanks for your detailed reply. I am not familiar with vb.net, so probably there are a few more code lines necessary for initialisation of the program. Maybe you can send me this code.

That problem has bitten me numerous times in the past. What I try to do is to order the chips, then print out the layout on paper ans place the chips to check the spacing.

Hi Ernst, Using the 5350B series meters is not simple with GPIB at first glance. But you have to follow a small procedure: You must put the meter in HOLD mode to begin. - Press the SET key - Press the

What about rubylith tape (like we used to use to make PCB artwork)? 3M makes tape (which is pricey) but you can buy sheets for a few dollars.

I keep looking at my parts and seems the issue with the parts is naming by different vendors.? .Nexperia SO20 is 7.5mm wide while TI SO20 is 5.3mm wide.? Lesson learnt - cant trust the names - need

Here is the pad difference seen on? half of U1 shown with SO20W and other half with both SO20 and? SO20W. Routing is possible but a few tracks and vias had to be moved. SO20W and SO20 overlap. This

Hello, my HBIB system works with 8568B spectrum anaylyzer, 8970A, 34401A and others. However I fail to connect a 5350B to my system. Diag 80 (HPIB diagnosis) shows no errors. Also tried ddifferent