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Test Equipment Anonymous (TEA) group therapy thread

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nixiefreqq:

--- Quote from: med6753 on May 26, 2018, 02:52:32 pm ---Portascope my ass!  :wtf: Although in it's day Dumont was good stuff. That scope looks a lot like an HP. Is it just rebranded or was it built by Dumont?

--- End quote ---

am pretty sure it was a genuine Dumont product.  later ones were badged Fairchild according to the manual.

they were very proud that it was "solid state"......BUT the front end used nuvistors.

med6753:
Bd139, I have to give you kudos in rebuilding that D83. That's not something I would tackle. Looking forward to seeing it complete.

In other news....this weekend (Memorial Day) is a 3 day weekend and the unofficial start of Summer. So it's time for family get togethers, picnics, cookouts, etc. But apparently there are families who should stay away from each other. I do a lot of listening on a Police/fire scanner. Starting last night the police have been EXTREMELY busy with domestic (family) disputes. It has continued right thru this morning and I expect it to get worse as the alcohol takes effect. Not a fun weekend to be a cop.  :scared:     

med6753:

--- Quote from: nixiefreqq on May 26, 2018, 03:03:39 pm ---
--- Quote from: med6753 on May 26, 2018, 02:52:32 pm ---Portascope my ass!  :wtf: Although in it's day Dumont was good stuff. That scope looks a lot like an HP. Is it just rebranded or was it built by Dumont?

--- End quote ---

am pretty sure it was a genuine Dumont product.  later ones were badged Fairchild according to the manual.

they were very proud that it was "solid state"......BUT the front end used nuvistors.

--- End quote ---

Yep, many Teks of that vintage used nuvistors in their front end until suitable FET's were available.

mnementh:

--- Quote from: Brumby on May 26, 2018, 05:51:49 am ---My under bench lighting has revealed something I didn't want to think about .... The dust collection in the far corners looks like there was an explosion in a felting class.

It's something I just can't unsee ...  :(

I'm just wondering what will travel up the hose if I get the vacuum out......

--- End quote ---

Dust elephants, not dust bunnies... a common infestation in that region. You'll need the BIG Shop-Vac, some brain bleach and a 24-inch crowbar in case there's a bull and it decides to charge.  :-DD


mnem
You mighht want to get the .303 out of the closet just in case they stampede...   :scared:

mnementh:

--- Quote from: bd139 on May 26, 2018, 08:32:27 am ---
--- Quote from: mnementh on May 26, 2018, 12:22:35 am ---Wouldn't it be easier to just clean up and recap the original board with the bodge wire?  |O

mnem
 :-//

--- End quote ---

I thought about that but the original board actually had electrolyte soak into it and it was oozing out of the sides as well. I think that one is a write off. The other board was in perfect condition just a bit dusty. Also it was attached to the chassis that had an IEC socket instead of the weird as hell 1970s proprietary inline thing they the other one had. Ergo I decided to take the hard road and make a frankenscope!

Edit: plus I actually enjoy doing things the sick twisted and hard way

--- End quote ---

Hmmm... I remember reading back in the day an article about this problem Nuts & Volts maybe. The solution presented was to cook the board in a solution of vinegar & water to neutralize the borax, then cook/scrub in distilled water, then soak in alcohol to clean everything and leech out the ethylene base. Obviously this is a process you want to watch carefully on a populated board.

And of course the hard way is always the most rewarding; even if only for the sense of relief when it's over. ;)


mnem
"...Oh, I beat my knee with a monkey wrench; 'cuz it feels so good when I stop..."

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