Ice-Tea's Score Thread

[coromonadalix]

you're talking of the connector inserted in the black  heatsink

[Ysjoelfir]

Pretty clean. They look pretty different but they are not. The 400MHz unit has additional shielding on the mainboard, the 300MHz does not. Having a look the the CRT driver board and "butt" board to check for bulging electrolytes or dreaded RIFAs. None to be found. But... there's something else going on. Can you spot it?

(Attachment Link)

What the.... why?

[Ice-Tea]

What the.... why?

Hell if I know. But the CRT was burned in. Perhaps it was used in an automated setup where the screen wasn't required and they figured with would save the display/power supply like this.

[Ysjoelfir]

That's actually not that bad of an idea imho. If you don't need the CRT, why kill it by displaying the same picture over and over?

[Ice-Tea]

True, but then again you can also turn down the brightness

[Ysjoelfir]

But that wouldn't stop it from being heated all the time.

[Ice-Tea]

Agilent 34420A Micro-Ohm Meter, 7 ½ Digit, includes new 34102A testlead



This thing is awesome.. And odd. Has some great specs, is in great shape. Includes the testlead, which I bought new for it. It sold fairly fast, customer was happy at first but later indacated there was too much noise on the measuremens and returned the unit for a full refund.

My first reaction was that he was full of shit, was measuring noise in his lab, borked up the nulling connector, ... So, when I got it back I wanted to repost it on eBay just like that. My engineering caution got the better of me, though, and I shipped it off to one of the forum voltnuts (Dr.Frank). He actually confirmed the customers findings: on higher voltage ranges, there's an occasional uptick in noise on the measurement, violating the specifications. He made another point: it's mostly moot as you would not need such low noise measurements on such high ranges (or rather: the 34420 is more meant for low voltage measurements). He verified pretty much all functional blocks without finding any issue. His final suggestion was perhaps newer FW contains mitigations but an update is not trivial.

So, finally, this is a coin with 2 sides. The unit is adjusted, calibrated and fully checked but there's a noise issue.

https://www.ebay.de/itm/143683112584

SOLD

[Ice-Tea]

R&S APN62

AF generator, but, like, a good one:

- balanced or unbalanced
- output impedance between 10 and 640 
- 0.05% distortion (!)
- this model has the output transformer option

Second one I receive, second one that shits the pants (Schaeffner line filter, off course). No biggie, but not cheap to repair either. I actually ran out of filters, so I have new ones on order. For sale if you're interested but it offers the option to share the insides of this bit of kit. The transormer is clearly visible.

[AVGresponding]

R&S APN62

AF generator, but, like, a good one:

- balanced or unbalanced
- output impedance between 10 and 640 
- 0.05% distortion (!)
- this model has the output transformer option

Second one I receive, second one that shits the pants (Schaeffner line filter, off course). No biggie, but not cheap to repair either. I actually ran out of filters, so I have new ones on order. For sale if you're interested but it offers the option to share the insides of this bit of kit. The transormer is clearly visible.

Wait what, it has a Pikachu inside it?

[Ice-Tea]

Heheh... took me a minute or so to catch up 

Yeah, that's the optional trafo.

[Ice-Tea]

SANKI ESD-8012 kV ESD Electrostatic Discharge Tester

This thing is just too much fun... 



Actually managed to capture a discharge in slowmo:

https://photos.app.goo.gl/1PfYo8ac1PtRM5Yb8

30kV ESD discharge tester. Now, do I keep it for when gentleman come calling for my daughters or do I sell it now?

Eh, well: https://www.ebay.de/itm/143914342337

SOLD.

[PA0PBZ]

Not sure how you created that link but that's not going to work:  http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=https://www.ebay.de/itm/143914342337

This will do: https://www.ebay.de/itm/143914342337

[Ice-Tea]

With the eBay "function" of the forum editor. Probably should have known better 

Thanks for the heads up!

[PA0PBZ]

Looks like you have to feed it the item #, but why you'd want to use that is beyond me 

[Ice-Tea]

Had to pop open a Marconi/IFR 2024/2025 to change covers so I took a quick picture for the fancier of finer electronics.

Yeah, I have some for sale if you want.

https://www.ebay.de/itm/143932629977

[Ice-Tea]

Had a gluke Y5020 current shunt on the bench. Something was rattling, so I opened her up.

Turns out the rattling were the front connectors that were open  Anyways, gives you guys a peak inside.

[Ice-Tea]

Marconi 6200B RF Test Set

Bit difficult to catch this thing under a single name, so they went for "RF Test Set". In essence, it combines (up to 20GHz)

- RF Signal Generator (including sweep)
- Frequency counter
- Power meter (with external sensor)
- Scalar Analyzer (up to four traces, with external sensor)

A scalar analyzer lands somewhere between an SA and VNA. It can read multiple traces at once (per example to compare to plot return losses against output power or something), so it does better than an SA there) but it can't offer any insight on phase relations. Unfortunately, it requires external sensors for both the scalar and power measurements. I have a few power sensors in stock and am including one with this unit but I currently have o scalar sensors. They aren't all that difficult to find on eBay, but they aren't all that cheap.

I actually have a custom flight case for it if you're interested.

eBay listing:

https://www.ebay.de/itm/143969971751

Essentially, with that kit you get a 20GHz RF gen, counter and power sensor. If you would like to complete the set with one or more scalar sensors you can buy them on eBay or if you want it to work guaranteed I can buy the scalar sensor and test it all before shipping out.