Author Topic: Test Equipment Anonymous (TEA) group therapy thread (Read 14815897 times)

worsthorse · « **Reply #32875 on:** June 09, 2019, 06:26:47 pm »

One thing is clear... I will spend far less time and shed many less tears if I just rebuild the battery pack. And yeah... storing it outside the case is the thing to do once that's done.

I couldn't take the not seeing if it works anymore (you may suspect, rightly, that patience is not my most visible quality) so I rigged up a 12VDC cable and managed to get it into the battery compartment, fat hands notwithstanding.

And... of course there's a power supply issue. I brought the power up to 12VDC and got a beam on the screen (good news) and as I released the current limit, the current spikes and goes to zero (bad news). I imagine its the same old bastard tant problem, so it is now in line for a recap.

BUT, I hate to spend a lot of time doing that, only to find that the tunnel diode needs to be replaced. Or maybe it doesn't matter and maybe the tunnel diode is good and in that case, this is a lot of TE for twenty-two bucks. It even came with the original coax test cable.

* wch is a little weak on decisioning today.

worsthorse · « **Reply #32876 on:** June 09, 2019, 06:27:46 pm »

Quote from: mnementh on June 09, 2019, 05:15:13 pm

Quote from: bd139 on June 09, 2019, 02:09:21 pm
Indeed. Just sold my FT818 and listed a whole load of other stuff so I'm looking at more expensive ones now

And you are agreeing with which of the MANY points in the post(s) above this one?

mnem

I can understand why you are selling the FT818. But why did you buy one in the first place?

bd139 · « **Reply #32877 on:** June 09, 2019, 06:29:50 pm »

Small, cheap, does everything, can't run QRO at home, plus a medium sized fuck you to the XYL at the time

tggzzz · « **Reply #32878 on:** June 09, 2019, 06:52:16 pm »

Quote from: wch on June 09, 2019, 06:26:47 pm

this is a lot of TE for twenty-two bucks. It even came with the original coax test cable.

Look at the price of that standard cable on fleabay - you have already made a profit!

They are rare and very special. Search for the part number and you will see someone has done a high quality non-destructive teardown of one.

mnementh · « **Reply #32879 on:** June 09, 2019, 07:34:00 pm »

Quote from: wch on June 09, 2019, 06:26:47 pm

One thing is clear... I will spend far less time and shed many less tears if I just rebuild the battery pack. And yeah... storing it outside the case is the thing to do once that's done.

I couldn't take the not seeing if it works anymore (you may suspect, rightly, that patience is not my most visible quality) so I rigged up a 12VDC cable and managed to get it into the battery compartment, fat hands notwithstanding.

And... of course there's a power supply issue. I brought the power up to 12VDC and got a beam on the screen (good news) and as I released the current limit, the current spikes and goes to zero (bad news). I imagine its the same old bastard tant problem, so it is now in line for a recap.

BUT, I hate to spend a lot of time doing that, only to find that the tunnel diode needs to be replaced. Or maybe it doesn't matter and maybe the tunnel diode is good and in that case, this is a lot of TE for twenty-two bucks. It even came with the original coax test cable.

* wch is a little weak on decisioning today.

Quick troubleshooting tip... Turn the current limit up to something below the point at which it shuts down, then look for the cap that gets hot. Replace, lather, rinse, repeat. We used to do the same thing back in the day using varying wattage in a dim-bulb tester with RCA TVs that had the "chopper" SMPS design.

mnem
*diag-ily*

med6753 · « **Reply #32880 on:** June 09, 2019, 07:34:29 pm »

The WO-505A is done. Vertical calibrated and compensation checked. Here it is displaying a 1MHz square from the Heath IG-4244 Scope Calibrator. Not too shabby for a scope with only a 5MHz bandwidth.

As you can see I labeled a reminder about keeping the intensity control no more than 3/4. RCA doesn't get a free pass on this. It's clearly a design fault. The control is 75K. It probably should have been no more than 50K to prevent going into what I would call an "overdrive" condition on the CRT.

And....the CRT for the Heath scope is at my local PO. So tomorrow morning I'll have it.

mnementh · « **Reply #32881 on:** June 09, 2019, 07:38:14 pm »

Now you need to find the viewing hood and Polaroid frame to go with it. And a Polaroid land camera... and the film... and...

mnem
*instigating-ily*

med6753 · « **Reply #32882 on:** June 09, 2019, 07:45:07 pm »

Quote from: mnementh on June 09, 2019, 07:38:14 pm

Now you need to find the viewing hood and Polaroid frame to go with it. And a Polaroid land camera... and the film... and...

mnem
*instigating-ily*

No, no...and no.

mnementh · « **Reply #32883 on:** June 09, 2019, 08:05:32 pm »

*Counts...*

Wait a minute... there's one more "thing" than you gave "no"s for... So which thing were you NOT saying no to?

mnem
Sounds like a "yes" to me...

med6753 · « **Reply #32884 on:** June 09, 2019, 08:09:26 pm »

On 2nd thought. Perhaps I will. Take multiple LARGE and out of focus pix and post them here. Have you cringe so bad your teeth crack and fall out.

kj7e · « **Reply #32885 on:** June 09, 2019, 08:24:57 pm »

Ordered some high resistance Russian glass resistors just to play with the HP 4329a. This thing makes it too easy.

So 1x 10 power of 12 = 1,000,000,000,000 or 1TOhm, cool!

Specmaster · « **Reply #32886 on:** June 09, 2019, 08:53:56 pm »

Quote from: med6753 on June 09, 2019, 08:09:26 pm

On 2nd thought. Perhaps I will. Take multiple LARGE and out of focus pix and post them here. Have you cringe so bad your teeth crack and fall out.

Ouch [emoji28][emoji28]

Sent from my POT-LX1 using Tapatalk

xrunner · « **Reply #32887 on:** June 09, 2019, 09:44:41 pm »

Quote from: kj7e on June 09, 2019, 08:24:57 pm

Ordered some high resistance Russian glass resistors just to play with the HP 4329a. This thing makes it too easy.

Ha yea that's really cool. How much were those resistors?

kj7e · « **Reply #32888 on:** June 09, 2019, 10:02:16 pm »

Quote from: xrunner on June 09, 2019, 09:44:41 pm

Quote from: kj7e on June 09, 2019, 08:24:57 pm
Ordered some high resistance Russian glass resistors just to play with the HP 4329a. This thing makes it too easy.

Ha yea that's really cool. How much were those resistors?

About $20 for a set of 5 various values;
https://www.ebay.com/itm/Set-5pcs-33MOhm-100-MOhm-1-GOhm-10G-1000G-Russian-military-glass-resistors-NOS/254180436862?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

mnementh · « **Reply #32889 on:** June 09, 2019, 11:15:34 pm »

Quote from: Specmaster on June 09, 2019, 08:53:56 pm

Quote from: med6753 on June 09, 2019, 08:09:26 pm
On 2nd thought. Perhaps I will. Take multiple LARGE and out of focus pix and post them here. Have you cringe so bad your teeth crack and fall out.
Ouch [emoji28][emoji28]

Sent from my POT-LX1 using Tapatalk

Hmmmm...? Oh sorry... I was away from the computer, doing things.

mnem
eeeebil fings.

mnementh · « **Reply #32890 on:** June 10, 2019, 12:36:11 am »

Quote from: mnementh on June 07, 2019, 05:20:20 pm

https://youtu.be/rSk_37So0Xk Oh, well then... since it's a gift from her, even if it is totally potato, you'd better learn to like it. Just like gladOS.

mnem
is it with the forum not previewing yoobToob vids right now?

https://youtu.be/wm5F4Wj_fUE

Speaking of everybody's favorite sociopathic neural-network cyber-construct... GLaDOS is back; and she has a daughter.

mnem
4 claws up!

0culus · « **Reply #32891 on:** June 10, 2019, 01:25:09 am »

As long as baby GLaDOS also gets a run-in with Wheatley and a potato battery, I'll be entertained.

mnementh · « **Reply #32892 on:** June 10, 2019, 02:05:30 am »

I'll keep my mouth shut.

mnem
Spoilers!

med6753 · « **Reply #32893 on:** June 10, 2019, 02:14:52 am »

I saw the preview the other day. Looked interesting but my record with most Netflix movies is that they tend to suck. Is this one any good?

maginnovision · « **Reply #32894 on:** June 10, 2019, 02:31:51 am »

It's ok.

0culus · « **Reply #32895 on:** June 10, 2019, 02:56:44 am »

I think their real strength is their shows. `Altered Carbon' is probably my favorite new sci-fi/dystopian series. Waiting to see what they do in the promised next season.

mnementh · « **Reply #32896 on:** June 10, 2019, 03:27:14 am »

I've been surprised a number of times by their productions. I don't think they're gonna suffer a bit from Disney pulling all their catalog to show exclusively on their own streaming service; might even free a bunch of money for more new production once they get out from under the Mickey-bloat.

Quote from: med6753 on June 10, 2019, 02:14:52 am

I saw the preview the other day. Looked interesting but my record with most Netflix movies is that they tend to suck. Is this one any good?

Was a 2019 Sundance premiere. Watched it with my son; I'd watch it again. Like I said; I give it 4 claws up. Pretty good, but not epic.

mnem

No.Mad · « **Reply #32897 on:** June 10, 2019, 10:57:59 am »

Checking out new HP PSU trying to charge this bad boy. Got it by chance in workplace, any idea of a manufacturer anybody?

bd139 · « **Reply #32898 on:** June 10, 2019, 11:31:14 am »

Philips / BC components. Should be a 2222 under that black wire if it is.

Edit: BTW they ain't cheap - about €70 a go.

No.Mad · « **Reply #32899 on:** June 10, 2019, 11:41:40 am »

Quote from: bd139 on June 10, 2019, 11:31:14 am

Philips / BC components. Should be a 2222 under that black wire if it is.

Edit: BTW they ain't cheap - about €70 a go.

Cheers bd139, might be that!

Unfortunately it seems to be dead, discharges seconds after turning off supply voltage. $:-\$


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Author Topic: Test Equipment Anonymous (TEA) group therapy thread (Read 14815897 times)

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