Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 14406026 times)

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Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30200 on: April 26, 2019, 04:43:26 pm »
Ah ha...I did not realize the time delay pot was different.
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Offline bitseekerTopic starter

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30201 on: April 26, 2019, 05:06:42 pm »
Ok so no SA + TG required now. I managed to frig up a rat's nest to do the job.

3310A 0-18V sweep output -> [ Tek 2225 X input + TF2015 sweep input ]
3310A sync output -> Tek 2225 Z input for blanking
TF2015 RF output -> 3dB attenuator -> filter -> AD8307 power sensor -> Tek 2225 Y input
6284A -> AD8307 power sensor

Have to sweep this really slow or the TF2015 oscillates wildly  :palm:

Output. Horizontal is 10MHz/div starting at 70MHz on the left. Vertical is 4dB/division.



Setup is good to 500MHz  :-+

With an SA + TG all I do is connect the filter between the TG/out ports and press a button. Is the laziness worth the money?

Awesome! And the 3310A is already earning its keep. :-+
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Offline bitseekerTopic starter

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30202 on: April 26, 2019, 05:30:50 pm »
Ok, likewise, no quantities given  >:D

Fluke 25
Fluke 27
Fluke 8840A
Fluke 8842A
HP 3466A
HP 3468A
HP 3478A
Proster VC97
Kew 1503
Robin OM840
Avo Mk8
TMK 700
Kyoritsu K1400
Bside ADM08A
Solartron 7150 Plus
TMK 500
Iotech UA6243L
Uni-T UT210E
Iso-Tech LCR1705
Philips PM2521

EDIT:
missed off my list  :palm:
Brymen BM867
Metrix MX52

Nice variety, Spec!

Quote
I never knew that you have a Keithley 160, I had one of those  for a while but it hardly got used so I flipped as is a bit big although nowhere near as big as your 196.

The posts go by fast around here these days. Here's the post of the Keithley 160. The photo is attached as a thumbnail.

The height of the 160 is similar to the HP 3478A and Fluke 8840/8842, but much shorter (similar length as the Fluke A90 current shunt, which now sits on top of it). I just got it for fun — Nixies! — and, although it doesn't have a lot of resolution, it's got amazing ranges considering when it was made.

The 196 is definitely bigger. It would've been nice if Keithley had squeezed it in a 199-sized enclosure instead. :D

Quote
Your Greenlee DM-820A is in fact a Brymen 827s

Yes! In the US, that's how it's officially distributed. The green boot is a nice change, too.
TEA is the way. | TEA Time channel
 

Offline bitseekerTopic starter

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30203 on: April 26, 2019, 08:34:00 pm »
Looking at your HP427A voltmeters I was reminded of my Philips PM2454. As an AC millivoltmeter it's of a different kind, but it does have a nice, big movement, too.

So I decided to take a closer look at it and create some more Philips pr0n.  8)

Already switched on:


Nice! Added to the POI.
TEA is the way. | TEA Time channel
 

Offline bitseekerTopic starter

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30204 on: April 26, 2019, 08:53:14 pm »
TEA is the way. | TEA Time channel
 

Offline tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30205 on: April 26, 2019, 08:56:47 pm »
...FurkBook is a toxic wastedump. I pulled the plug there years ago when I discovered what colossal timesink it is; long before we discovered what an utter fuckstick Zuckerberg, et al were being with people's personal data.  :palm:
The other points that are of considerable relevance to an archive of information are:
  • can someone google to locate the information
  • will the information be accessible in 5 years time
Farcebook fails both of those, badly. Certainly I wouldn't waste my time generating information for it.
If it's Social Media, then you are the product being sold. They are a content aggregator where you create the content. That's true of eevBlog as well, in the strictest sense.  :-\

The difference is that is that here your personal information stays yours up to whatever point you allow, and in general, the SNR is MUCH better. There is real value in that.  :-+

That is also true, but is a separate point. The stuff that I post here doesn't disappear at the whim of an algorithm designed to do who knows what.
There are lies, damned lies, statistics - and ADC/DAC specs.
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30206 on: April 26, 2019, 09:17:02 pm »
No it disappears when gnif cocks up instead  :-DD

Everything is ephemeral. Enjoy the moment. Just try not to do it on Facebook as it’s a sack of shit.
 

Offline Neomys Sapiens

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30207 on: April 26, 2019, 09:38:54 pm »
Meters?
Already listed here:
https://www.eevblog.com/forum/chat/show-your-multimeter!/msg1191159/#msg1191159

Since then, I only added the Metrawatt 2035 and, right now, the Siemens B1023 (in its Gossen Mavo30 guise).
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30208 on: April 26, 2019, 10:06:58 pm »
Later today I'm going to be making a short (under 2 hr) road trip. If the trip is successful I will be making the best score ever. It will even beat the $65 USD Tek 2465 score from last year in terms of value/goods received. I'm not going to reveal what it is just yet. When the transaction is complete I'll do a full reveal. If the deal goes belly up I'll reveal that too.

Stay tuned.  ;D

The deal was consummated and here it is. Tek 7904. 500MHz of analog goodness. Included in the deal is a 7A26 200MHz vertical, a somewhat uncommon 7A24 400MHz vertical which is genuine 50 ohm input only, and 2- 7B80 timebase. The price for all this goodness? $100 USD! The caveat: it doesn't power up. It has the classic switch mode tick-tick which is usually the caps. Most likely a bastard tant. Should be a straight forward fix.



As you can see it fits on my custom scope cart because I designed originally with a 4 slot 7000 series in mind. So the 3 slot 7603N has been kicked off. I'm also going to have to source some FET probes in order to utilize the 7A24 vertical plug-in.



To say I am tickled pink with this find is an understatement. It's like being reunited with an old friend. The last time I had my paws on a 7904 was sometime around 1977.   

And here's the proof. The Craigslist ad.
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Offline Neomys Sapiens

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30209 on: April 26, 2019, 10:33:51 pm »
I bought 4 auctions/packages labeled as 'semiconductor spares for HP and Tek instruments': 3 of transistors and one of diodes. The seller claimed that rare specimen are among the assortments, but there are also rather standard types.
I haven't got them in the inventory yet, so requests have to be direct.
 

Offline bitseekerTopic starter

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30210 on: April 26, 2019, 11:08:03 pm »
Later today I'm going to be making a short (under 2 hr) road trip. If the trip is successful I will be making the best score ever. It will even beat the $65 USD Tek 2465 score from last year in terms of value/goods received. I'm not going to reveal what it is just yet. When the transaction is complete I'll do a full reveal. If the deal goes belly up I'll reveal that too.

Stay tuned.  ;D

The deal was consummated and here it is. Tek 7904. 500MHz of analog goodness. Included in the deal is a 7A26 200MHz vertical, a somewhat uncommon 7A24 400MHz vertical which is genuine 50 ohm input only, and 2- 7B80 timebase. The price for all this goodness? $100 USD! The caveat: it doesn't power up. It has the classic switch mode tick-tick which is usually the caps. Most likely a bastard tant. Should be a straight forward fix.



Wow! That's an awesome beast. Hope it's just caps.
TEA is the way. | TEA Time channel
 
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30211 on: April 26, 2019, 11:16:24 pm »
That’s a steal at $100. Nice one  :-+
 
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Offline neo

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30212 on: April 26, 2019, 11:27:47 pm »
Later today I'm going to be making a short (under 2 hr) road trip. If the trip is successful I will be making the best score ever. It will even beat the $65 USD Tek 2465 score from last year in terms of value/goods received. I'm not going to reveal what it is just yet. When the transaction is complete I'll do a full reveal. If the deal goes belly up I'll reveal that too.

Stay tuned.  ;D

The deal was consummated and here it is. Tek 7904. 500MHz of analog goodness. Included in the deal is a 7A26 200MHz vertical, a somewhat uncommon 7A24 400MHz vertical which is genuine 50 ohm input only, and 2- 7B80 timebase. The price for all this goodness? $100 USD! The caveat: it doesn't power up. It has the classic switch mode tick-tick which is usually the caps. Most likely a bastard tant. Should be a straight forward fix.



Wow! That's an awesome beast. Hope it's just caps.

Med, your one lucky bastard and I mean that in the best possible way. I adore the tek mainframes and thats second on my wishlist only to a 7104. Nice score!  :-+
A hopeless addict (and slave) to TEA and a firm believer that high frequency is little more than modern hoodoo.
 
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Offline Sapper

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30213 on: April 26, 2019, 11:54:02 pm »
After having my interest rekindled I bought myself a Hantek DSO 5102 and despite all the posts regarding the superior Rigol scope I still chose the Hantek as it was half the price of the cheapest Rigol I could find. It has more features than I will ever need and as I have many other items to save up for I simply couldn't justify the cost of the Rigol.

I also scored a nice example of a Tektronix 465B yesterday for the princely sum of £0.00p. Yes I was given one for free. It works perfectly though it did take a while to finally see the power switch. Not torn it apart yet but it won't be too long. I have a habit of opening things just to see whats inside (electronic or mechanical), I've been doing the same thing since I was about 7 or 8 years old.

Hoping to score another big brand analog scope pretty soon. It's seen very little use and will be fed into an industrial shredder if not rescued beforehand.

Just the start of what I hope to be a growing collection of lab gear.
 

Offline bitseekerTopic starter

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30214 on: April 27, 2019, 01:37:09 am »
Welcome, Sapper. If you spend too much time here, it's a collection that's bound to grow.
TEA is the way. | TEA Time channel
 

Offline GreyWoolfe

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30215 on: April 27, 2019, 01:52:12 am »
Later today I'm going to be making a short (under 2 hr) road trip. If the trip is successful I will be making the best score ever. It will even beat the $65 USD Tek 2465 score from last year in terms of value/goods received. I'm not going to reveal what it is just yet. When the transaction is complete I'll do a full reveal. If the deal goes belly up I'll reveal that too.

Stay tuned.  ;D

The deal was consummated and here it is. Tek 7904. 500MHz of analog goodness. Included in the deal is a 7A26 200MHz vertical, a somewhat uncommon 7A24 400MHz vertical which is genuine 50 ohm input only, and 2- 7B80 timebase. The price for all this goodness? $100 USD! The caveat: it doesn't power up. It has the classic switch mode tick-tick which is usually the caps. Most likely a bastard tant. Should be a straight forward fix.

As you can see it fits on my custom scope cart because I designed originally with a 4 slot 7000 series in mind. So the 3 slot 7603N has been kicked off. I'm also going to have to source some FET probes in order to utilize the 7A24 vertical plug-in.

To say I am tickled pink with this find is an understatement. It's like being reunited with an old friend. The last time I had my paws on a 7904 was sometime around 1977.   

And here's the proof. The Craigslist ad.

Wish I had a Craigslist like you do around here.  Some wanker is selling a used Rigol 1054Z for $500.  Normally, I laugh and move on but I felt required to let him know new ones are $150 cheaper.  I did so kindly but I doubt he will take it that way.  That's why I used a throw away email account.
"Heaven has been described as the place that once you get there all the dogs you ever loved run up to greet you."
 

Offline beanflying

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30216 on: April 27, 2019, 01:55:35 am »
We are more likely to find a dodgy car or broken chair on our local version Gumtree. |O  I did find @Brumby an Oscillator a while back not far from him but it's a rarity.

Welcome, Sapper. If you spend too much time here, it's a collection that's bound to grow.

Welcome too 'Abandon hope all ye who enter here'  ;D
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Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30217 on: April 27, 2019, 02:39:13 am »
A word of warning, the feet on these are very small and if you attempt to stack them, heat build up becomes an issue. The typically draw around 17 Watts each but the heat can't dissapate easily with something stacked above it, such as in my case another 7150, the top one gets warm but the one below gets very hot. I'm adding feet which are 10mm tall to mine to give better air flow to wick away the heat.

Sent from my POT-LX1 using Tapatalk



39mm x 55mm Spacer

Here ya go buddy.  :-DD

...FurkBook is a toxic wastedump. I pulled the plug there years ago when I discovered what colossal timesink it is; long before we discovered what an utter fuckstick Zuckerberg, et al were being with people's personal data.  :palm:
The other points that are of considerable relevance to an archive of information are:
  • can someone google to locate the information
  • will the information be accessible in 5 years time
Farcebook fails both of those, badly. Certainly I wouldn't waste my time generating information for it.
If it's Social Media, then you are the product being sold. They are a content aggregator where you create the content. That's true of eevBlog as well, in the strictest sense.  :-\

The difference is that is that here your personal information stays yours up to whatever point you allow, and in general, the SNR is MUCH better. There is real value in that.  :-+
That is also true, but is a separate point. The stuff that I post here doesn't disappear at the whim of an algorithm designed to do who knows what.
No it disappears when gnif cocks up instead  :-DD

Everything is ephemeral. Enjoy the moment. Just try not to do it on Facebook as it’s a sack of shit.

1000x this. The internet is not an endless warehouse of our history online... it was a different country when my wife and I were courting on it 20 years ago, and it is yet a different world now. Heck... pretty much the only thing that remains from then is my HoMail account, and they keep trying to get me to give that up for a "newer, fresher look" that I don't want or need. All the domains I used to own... used to frequent... gone with the hosting agencies they used to live on. You know, unless you get lucky and they scraped a layer or two for the WayBack Machine.  :o

Also 1000x this about FurkBook. Made of shit by a piece of human shit. They've suborned so many things that were so promising... Oculus Rift just being the latest in a long line of truly groundbreaking tech to be ingested by Zuckerburg's Shit Golem.  :palm:

mnem
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Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30218 on: April 27, 2019, 02:47:10 am »
Later today I'm going to be making a short (under 2 hr) road trip. If the trip is successful I will be making the best score ever. It will even beat the $65 USD Tek 2465 score from last year in terms of value/goods received. I'm not going to reveal what it is just yet. When the transaction is complete I'll do a full reveal. If the deal goes belly up I'll reveal that too.

Stay tuned.  ;D

The deal was consummated and here it is. Tek 7904. 500MHz of analog goodness. Included in the deal is a 7A26 200MHz vertical, a somewhat uncommon 7A24 400MHz vertical which is genuine 50 ohm input only, and 2- 7B80 timebase. The price for all this goodness? $100 USD! The caveat: it doesn't power up. It has the classic switch mode tick-tick which is usually the caps. Most likely a bastard tant. Should be a straight forward fix.

      

As you can see it fits on my custom scope cart because I designed originally with a 4 slot 7000 series in mind. So the 3 slot 7603N has been kicked off. I'm also going to have to source some FET probes in order to utilize the 7A24 vertical plug-in. To say I am tickled pink with this find is an understatement. It's like being reunited with an old friend. The last time I had my paws on a 7904 was sometime around 1977.   

And here's the proof. The Craigslist ad.

indeed! Well-earned!  :clap:

mnem
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alt-codes work here:  alt-0128 = €  alt-156 = £  alt-0216 = Ø  alt-225 = ß  alt-230 = µ  alt-234 = Ω  alt-236 = ∞  alt-248 = °
 
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Offline Brumby

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30219 on: April 27, 2019, 02:50:06 am »
We are more likely to find a dodgy car or broken chair on our local version Gumtree. |O 
Yes.  Test gear does not show up very often down under - and when it does you actually do think twice about travelling for 4 hours to pick up a $20 sign gen.  Just adding in the fuel cost makes the trip a dumb idea - but you do think about it for a moment.

Quote
I did find @Brumby an Oscillator a while back not far from him but it's a rarity.
To be fair, Bean did find more than that - but I was only successful in securing the sig gen (an HP 8656B) plus second one missing a few parts.

That was an exceptional event.

Quote
Welcome, Sapper. If you spend too much time here, it's a collection that's bound to grow.

Welcome too 'Abandon hope all ye who enter here'  ;D
Yes ... You are guaranteed to find enablers helpful people here.  I know I did.
 

Offline Neomys Sapiens

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30220 on: April 27, 2019, 03:44:08 am »

The deal was consummated and here it is. Tek 7904. 500MHz of analog goodness. Included in the deal is a 7A26 200MHz vertical, a somewhat uncommon 7A24 400MHz vertical which is genuine 50 ohm input only, and 2- 7B80 timebase. The price for all this goodness? $100 USD! The caveat: it doesn't power up. It has the classic switch mode tick-tick which is usually the caps. Most likely a bastard tant. Should be a straight forward fix.



To say I am tickled pink with this find is an understatement. It's like being reunited with an old friend. The last time I had my paws on a 7904 was sometime around 1977.   

And here's the proof. The Craigslist ad.
Nice grab. I looked at it before but never noticed this elaborate calibrator function/module. Now I looked around TekWiki and I'm baffled: the highest performing analogue storage mainframes don't have it and neither does the 7104 nor the 7854. Does anyone have an idea on which rationale it was assigned to the 7904, the 7844 and the 7704 (but not the 7704A) and omitted on the others? I would have thought this to be a feature they all could have put to good use and also something Tek could have pointed out as a special advantage!
 
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Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30221 on: April 27, 2019, 03:51:24 am »

Nice grab. I looked at it before but never noticed this elaborate calibrator function/module. Now I looked around TekWiki and I'm baffled: the highest performing analogue storage mainframes don't have it and neither does the 7104 nor the 7854. Does anyone have an idea on which rationale it was assigned to the 7904, the 7844 and the 7704 (but not the 7704A) and omitted on the others? I would have thought this to be a feature they all could have put to good use and also something Tek could have pointed out as a special advantage!

Tek eliminated it on the 7904A too and went back to a more simpler calibrator. I don't know why.  :-//
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Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30222 on: April 27, 2019, 03:57:03 am »
Later today I'm going to be making a short (under 2 hr) road trip. If the trip is successful I will be making the best score ever. It will even beat the $65 USD Tek 2465 score from last year in terms of value/goods received. I'm not going to reveal what it is just yet. When the transaction is complete I'll do a full reveal. If the deal goes belly up I'll reveal that too.

Stay tuned.  ;D

The deal was consummated and here it is. Tek 7904. 500MHz of analog goodness. Included in the deal is a 7A26 200MHz vertical, a somewhat uncommon 7A24 400MHz vertical which is genuine 50 ohm input only, and 2- 7B80 timebase. The price for all this goodness? $100 USD! The caveat: it doesn't power up. It has the classic switch mode tick-tick which is usually the caps. Most likely a bastard tant. Should be a straight forward fix.

As you can see it fits on my custom scope cart because I designed originally with a 4 slot 7000 series in mind. So the 3 slot 7603N has been kicked off. I'm also going to have to source some FET probes in order to utilize the 7A24 vertical plug-in.

To say I am tickled pink with this find is an understatement. It's like being reunited with an old friend. The last time I had my paws on a 7904 was sometime around 1977.   

And here's the proof. The Craigslist ad.

Wish I had a Craigslist like you do around here.  Some wanker is selling a used Rigol 1054Z for $500.  Normally, I laugh and move on but I felt required to let him know new ones are $150 cheaper.  I did so kindly but I doubt he will take it that way.  That's why I used a throw away email account.

Didn't you say you were originally from Jersey? Well you should have never left. That's where the deals are. There's a bunch of assorted scopes on there right now. This 7904 was in Vernon which is about a 100 miles round trip for me. Was absolutely worth it.  :-+
An old gray beard with an attitude.
 

Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30223 on: April 27, 2019, 04:10:01 am »
As much as I want to tear into this 7904 right now and get it running it's going to sit for a while. Other priorities at the moment. First I need to do a few minor things to complete the bathroom redecorate. That's going to take all day Saturday. Sunday is a hamfest in Middletown, NY. I don't know if it's outside or inside because the weather forecast is shit. Rain and cool. Guess I better bring an umbrella.

There's two other TEA projects I want to finish first before working the 7904. Of course I'll post pron once I open it up. I did peek inside and it's extremely dusty/dirty from being in a thankfully dry cellar but with wood working tools. It's going to need a lot of cleaning. I'll be testing each plug-in on the 7603N to make sure they are OK.
An old gray beard with an attitude.
 

Offline beanflying

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #30224 on: April 27, 2019, 04:13:58 am »
Just an observation as an outsider the the USA there is very little Test Gear on Evilbay as a % coming from the East Coast and in particularly the NE  :-//

Is it a lack of Bulk Sellers, lack of industry or a tightass thing that sees Craigslist being used?  :-DD
Coffee, Food, R/C and electronics nerd in no particular order. Also CNC wannabe, 3D printer and Laser Cutter Junkie and just don't mention my TEA addiction....
 


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