I the unit was great so I can't complain..
This was my attempt...
Better stop now or I'll end up down one for real....
I think... speaking as a dwagon, with some experience here... that any such attempt just makes it look like you're trying to set Benjamin Bunny on fire. I mean, if that's the feel you're going for, then , well done.
But otherwise... maybe a strategic withdrawal from the meme would be most prudent. The only way it would work is if you found a way to actually put a nixie counter in frame to put the hearthlike glow in context.
mnem
*Glowy*
https://www.ebay.com/itm/HP-8565A-Spectrum-Analyzer/292802470214
Looks a LOT like an 8569, just modular. Interesting.
I have buyed that in .fr
looks now much better
Those mini scopes are so neat. I must get one, one day.
https://www.ebay.com/itm/HP-8565A-Spectrum-Analyzer/292802470214
Looks a LOT like an 8569, just modular. Interesting.
I was wrong I am in for a 8559A, also an HP4140B and Tek PS5250 from the same seller. But I wont do the bid war, no watchers or bids when I put it up, so we'llsee if any hold though
Spending far to many HOURS manually trimming the Ratio Box but it's kind of therapeutic
This is the offending Nominal 600 Ohm card removed fairly easily from the system. It is actually two parallel runs wound in opposite directions to minimize inductance so I shortened both by a 1/2 a turn to bring them from 607 to 594 meaning I had to bump up the trimming bobbin by 3 to get to where it needed to be. Give me a swizzle stick and a trim pot any day.
Trimmed some of the others closer to their nominal values so the divider should be nearly well under 0.02% when I am done if not a bit better if my patience holds out.
My "portable" mini Tek 323. Still 'works a treat' but I do need to replace the battery bank
My "portable" mini Tek 323. Still 'works a treat' but I do need to replace the battery bank
Huh I never new Sony put their brand on Tek equipment. Neat!
My "portable" mini Tek 323. Still 'works a treat' but I do need to replace the battery bank
Huh I never new Sony put their brand on Tek equipment. Neat!
@med: noone replied to the post for either of the 7704 units yet, so I still plan to send you the A model. Shipping via USPS is gong to be about $85. Its big, odd and heavy. But I will PM you the dimensions and weight of the box and you can shop around for better prices as well.
On that note if anyone is travelling up to NY and coming through TN, maybe we can link up and you can run it up to MED or at least get a lot closer.
Lets play with the PM6303A RCL meter...pics to come
My "portable" mini Tek 323. Still 'works a treat' but I do need to replace the battery bank
Huh I never new Sony put their brand on Tek equipment. Neat!
They had a short run with Sony and a lot of them are now collectibles. I gotta say, as cool as the American EE is and was, the Sony spin brought a new era of compact design. Its getting harder to find complete Sony/Tek gear (not that it is "hard" now, just watch the part #'s) but soon the 'parts swappers' will have ruined the era. This unit is still 100% Sony/Tek. You can see the stamp o the CRT. The Japanese EE's did well to make the US EE's rethink space. I am sure Martin.M will fill us in more.
unpacking HP 8556A
Unpacking HP 19511-80014...
mnem
Oh, I kill me...
Part number humor. I like it.
I have buyed that in .fr
looks now much better
Those mini scopes are so neat. I must get one, one day.
the restoration of them can be a adventure. But they need not a lot of space for a collection.
200Series, µTek
211 is a single channel 0,5MHz
212 is a two channel 0,5MHz
213 is a single channel 1MHz with onscreen DMM
214 is a two channel 0,5MHz with storage CRT
221 is a single channel 5MHz
higher numbers are the little DSO.
222 you have seen, 10MHz, the cpu clock is only 8MHz
224 is the same, but specified to 60MHz
general problem: batteries damage inside.
211 - 221 use NiCd , and when they are leaky the acid will destroy something on the board. This can grow to a hard job.
Exception is the 213, it have 2 pcs D Cells sitting in large wholes of the boards, so the acid soup flow in the downside case and there is no destroy to calculate.
222+224: they are made with smd ! The batteries are obsololete, it requires 8V lead cells to work.
CRT of all of them: obsolete, you can wait years to get one.
Specialities: µTek is made to check at higher voltages. Do not wonder to see at the little vertical button 100V/div that is no mistake !
About that the isolation class of the probes is very special, including the ground clips.
222 + 222A, 224 have isolation amplifiers, they allow higher voltage between the 2 ground clips.
Picture: 212, 213, 214, 221 and 222. (I am looking for the 211..)
I am about to unwind. To many Bobbins wound, cut tweaked soldered, tweaked , cut rewound tweaked .....
600 Ohm needs a touch more wire but I am out and will live with it being 0.03% low Plenty good enough for 4.5+ digits at that.
Sure beats the hell out of my resistor reference. Simple switch box with 0.1% resistors 1 thru 10M. Plugs directly onto DMM under test to minimize lead resistance. Works good enough for me.
My "portable" mini Tek 323. Still 'works a treat' but I do need to replace the battery bank
Huh I never new Sony put their brand on Tek equipment. Neat!
They had a short run with Sony and a lot of them are now collectibles. I gotta say, as cool as the American EE is and was, the Sony spin brought a new era of compact design. Its getting harder to find complete Sony/Tek gear (not that it is "hard" now, just watch the part #'s) but soon the 'parts swappers' will have ruined the era. This unit is still 100% Sony/Tek. You can see the stamp o the CRT. The Japanese EE's did well to make the US EE's rethink space. I am sure Martin.M will fill us in more.I sure wish Martin would spill all his invaluable knowledge on Teks in his Tek restoration thread. <busy strumming fingers> and
Or in a new thread: Martin.M's Tek ramblings.................
Sure beats the hell out of my resistor reference. Simple switch box with 0.1% resistors 1 thru 10M. Plugs directly onto DMM under test to minimize lead resistance. Works good enough for me.
4-wire sensing works for me.