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cncjerry:
thanks again.  still debating.  Now I'm thinking I want a 438 instead of a 437.  I found sensors in the 150 range, cable in the $50 range and I can get a 438 for around 150 or less.  So for 350 I can get one channel configured and then work on the second at a later date.  The power sensors look like the are very band and range specific.  If doesn't look like many have more than about 50db of range.  So it looks like you have to have a stack of attenuators.

The problem I have is after picking up the 8350 for a song, I find it hard to pay double for a power meter, or more.  I pulled the plug-in out of the 8350 today and it is absolutely spotless.  Nice and clean - almost polished - rails.  I doubt it was used much.  The liquidator that sold it really doesn't have much equipment so it must have been a fluke.

I posted another thread asking if I can somehow mix it to use as a TG for my 8566b second band from 2.0 to 5.8Ghz.  I can use it with max hold, of course.

Thanks for all the info on power sensors.  Still looking.

Jerry

orin:

--- Quote from: cncjerry on December 09, 2018, 10:14:44 pm ---thanks again.  still debating.  Now I'm thinking I want a 438 instead of a 437.  I found sensors in the 150 range, cable in the $50 range and I can get a 438 for around 150 or less.  So for 350 I can get one channel configured and then work on the second at a later date.  The power sensors look like the are very band and range specific.  If doesn't look like many have more than about 50db of range.  So it looks like you have to have a stack of attenuators.

--- End quote ---

Mini-Circuits will sell you a stack of attenuators... I have a K1-UNAT+ - good to 6GHz.  I tend to keep the 30dB attenuator on the 8484A.

cncjerry:
And Orin, nice to hear from you, hope all is well up north.  I'm still taking good care of your Geller standard and will repay the favor someday I hope.  Playing with any 3456s lately?  I still have one in the garage a patient gentleman sent me to fix about 18 months ago and though I said "at my convenience" I think this is pushing it and I should get a move on.  They are fun to fix on a rainy day.

Jerry

orin:

--- Quote from: cncjerry on December 11, 2018, 07:41:21 am ---And Orin, nice to hear from you, hope all is well up north.  I'm still taking good care of your Geller standard and will repay the favor someday I hope.  Playing with any 3456s lately?  I still have one in the garage a patient gentleman sent me to fix about 18 months ago and though I said "at my convenience" I think this is pushing it and I should get a move on.  They are fun to fix on a rainy day.

Jerry

--- End quote ---


Hi Jerry,

All is well up here - at least after getting a new furnace on Monday.  Glad that the Geller is still alive and well and has a good home.  I haven't been doing anything with the 3455 or 3456s.  I should get back to that nanoprocessor FPGA project.

Orin.

cncjerry:
OK, I've had a run of good luck.  I picked up two 3586 Selective Level Meters for $50 per.  These are basically a radio that was used for testing channelized voice on T1 and other lines.  I can't remember what the voice technology was called but it was still around in 2001 when I was at cisco.  Very accurate for testing filters, etc. up to 30Mhz with some limitations above 20Mhz.  There are a number of boxes that look like this including the 3336 Synthesized Level generator, 3325 Synthesize/ Function Generator, 5325 Universal Counter, and I think one or two others.  I have one of each or so, ok, two of each or so.  I've had a 3586B that I've used for the Frequency Measuring Tests but the more desirable of the 3586's are the 'C' model as it has a true 50ohm input.  The two I bought today for their Option 004 ovenized 10811 oscillators are an 'A' and 'C' with the 'C' being in the better shape.  It has some hanger rash on the cases but not real bad.  You can see the front panel is in pretty good shape.  The issue with this line of products from HP were the white line across the front under the LED display always discolored.  But it can probably be fixed with the peroxide and sunlight trick. 

The 'A' unit didn't fully power on but the fans started and it went into standby, but no lights, etc.  Probably a power issue.  The 'C' model powered up with an error.  I wasn't going to fix it but when I opened it up to gut it, it was so absolutely gorgeous on the inside I thought I would take a crack at fixing it.  Turned out to be the fractional N VCO so I swapped it with one from the unwanted 'A' unit and off it goes.  Works perfectly.  I tweaked the oscillator to my Cesium beam and ran if for a couple of hours and I'm happy with it.  I'll put it on top of my 'B' unit and decide which to use in the future.

So take a look at how these are built.  The HP 8566B and 8568B spectrum analyzers were built the same way with bolt-down panels holding the cards sliding into a frame.  These units weight a ton.  The 8566B I know exceeds 140lbs with the two units.  This thing has to be over 60lbs.  It's a pain to get the cards out because of all the bolts but it is solid.  After removing the bolts you pull on the silver spindles to remove the cards

Anyway, that's all for now.

Jerry

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