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My DMMCheck arrived and a quick check shows the 34401A and TF930 to be spot on or one least significant digit out. AC voltage is a few more digits off, I'll need to double check whether that's within calibration or not. I'll run a full report sometimes soon.So far I'm quite happy. It's not a full calibration, but certainly a very welcome sanity check and close enough to it for all but the most demanding jobs. Doug was a stellar guy too. Very friendly.
Looking good I reckon these have held calibration well since jan 2017. Well apart from the one I fucked up I’m trying to work out if I can write something to dump and load the cal data via HP-IB. Might give people an insurance policy without having to fish out for a cal cert. Arduino jobby looks possible.
I temporarily organised my stack to fit the HP3478A in. I shall have to make some alterations yet because it currently is sitting on top of a HP3466A and a Solartron 7045, both of which are smaller so their positions need to be reversed. Unable to do that yet as there are power sockets and wall warts behind them which prevents the HP3478A from going at the bottom due to its extra length fouling the sockets.
I finally got round to taking some pics of my ESI 250DE bridge, but I'm having trouble getting them to post, even though I shrank them. Erm, problem solved, ahem.
That's a really nice looking ESI 250DE. Really like the quality of ESI equipment.Yours seems to be a pre-70's version and has several internal differences compared to my 1971 vintage unit.Photos and 1974 service manual on my blog. https://www.barbouri.com/2018/03/24/esi-250-de-universal-impedance-bridge/
Or you didn't fancy a tongue lashing from wife...another haircut or shopping trip to Westfield would wipe out any profits from the scope though so on balance maybe its for the best.
I’ve said before and I guess I’ll repeat myself. So glad her and I maintain separate residences so I don’t have to resort to skullduggery and begging so feed my TEA. She visited last weekend and saw the scope cart with the big 7603 sitting on it. She asked “What is that?” while she was opening 2 expensive handbags that were delivered to my place rather than hers because package theft is a big problem in her area. I answered her and that was that. My money = My TEA. Her money = Her handbags. No fuss. No issues.
Quote from: med6753 on April 26, 2018, 03:15:43 amI’ve said before and I guess I’ll repeat myself. So glad her and I maintain separate residences so I don’t have to resort to skullduggery and begging so feed my TEA. She visited last weekend and saw the scope cart with the big 7603 sitting on it. She asked “What is that?” while she was opening 2 expensive handbags that were delivered to my place rather than hers because package theft is a big problem in her area. I answered her and that was that. My money = My TEA. Her money = Her handbags. No fuss. No issues. It'd surprise you how much TEA could be afforded by not having two residences to pay for. Or children.
a lovely vintage AM/FM signal generator which is supposed to be working.
Ebay is definitely looking up of late, this week alone I have made 2 scores in the TEA dept among many other none related purchases, the first was the lovely HP3478A of 1984 vintage which although missing 2 feet and the tilting bail was in very good condition cosmetically and electrically (photos posted earlier), a final one to post tomorrow after its been cleaned and a lovely vintage AM/FM signal generator which is supposed to be working.
Quote from: Specmaster on April 25, 2018, 11:51:28 pmEbay is definitely looking up of late, this week alone I have made 2 scores in the TEA dept among many other none related purchases, the first was the lovely HP3478A of 1984 vintage which although missing 2 feet and the tilting bail was in very good condition cosmetically and electrically (photos posted earlier), a final one to post tomorrow after its been cleaned and a lovely vintage AM/FM signal generator which is supposed to be working.Hah, I thought that Advance dial looked familiar.Got a similar one here ex military a J1A 15Hz -50KHz AF gen.Tucked away as a rainy day project....dunno if it even goes. Yours looks the better featured one.
Quote from: tautech on April 26, 2018, 07:41:38 amQuote from: Specmaster on April 25, 2018, 11:51:28 pmEbay is definitely looking up of late, this week alone I have made 2 scores in the TEA dept among many other none related purchases, the first was the lovely HP3478A of 1984 vintage which although missing 2 feet and the tilting bail was in very good condition cosmetically and electrically (photos posted earlier), a final one to post tomorrow after its been cleaned and a lovely vintage AM/FM signal generator which is supposed to be working.Hah, I thought that Advance dial looked familiar.Got a similar one here ex military a J1A 15Hz -50KHz AF gen.Tucked away as a rainy day project....dunno if it even goes. Yours looks the better featured one.I never even knew that the Military used Advance equipment, but it sure looks the part, just hope that its better then the last 2 lemons I got of Ebay.
Military used lots of advance kit. Made to order and spec. Problem is that it was made to British standards of the 1960s-80s which wasn’t great. Same with Marconi, Avo etc. You could smell the regret in about 1995 when there were skips of it dumped off and then 2005’s mass dumping pointed at them replacing it all with HP and Tek kit. When I worked in defence sector the kit was all HP by then. Plus some Tek 7000’s. Literally nothing else. Think there were some limping Marconi 2955s as well.
Well for prosperity I'd better add a pic:This one is labeled to have spent some time in Crete.
Quote from: bd139 on April 26, 2018, 08:00:22 amMilitary used lots of advance kit. Made to order and spec. Problem is that it was made to British standards of the 1960s-80s which wasn’t great. Same with Marconi, Avo etc. You could smell the regret in about 1995 when there were skips of it dumped off and then 2005’s mass dumping pointed at them replacing it all with HP and Tek kit. When I worked in defence sector the kit was all HP by then. Plus some Tek 7000’s. Literally nothing else. Think there were some limping Marconi 2955s as well.So its going to be fairly robust at least. I really wanted a Marconi TF2015 but those are to expensive still. I hoping that this one is a good one, I've purchased a few turds so far in this camp that I suppose I might have been better going for working TF2015 in the first place, but this is more fun
I'm intrigued, just how in blue blazes did you make the assumption about the dials, to me they look generic like the other makes around that time, not even the knobs are alike although I think its highly likely that the indicator lights are the same?