Date   
Re: P6042 Current Probe Repair -- Need new probe cable

 

On Mon, Oct 7, 2019 at 03:47 AM, @0culus wrote:


Thanks for the part number. I will keep a watch.
Just a thought ......
Comparing the schematics of A6302 and P6042 the cable looks very similar.
I have several scrapped A6302 so if you think it can be used as a substitute
I can send a cable for the cost of shipping. Contact me off list if you are interested.

/Håkan

Re: P6042 Current Probe Repair -- Need new probe cable

Jean-Paul
 

Bonjour, from 1970s....1990s We used the DC TEK probes for power electronics design and debugging.
The P6042 typically has a poor DC baseline stability, and the coarse / vernier DC control potentiometer gets scratchy. The permanently attached cable is prone to fail.

Worse, the P6042 transistors are on sockets which always get flaky, as the socket pins and transistors leads oxidized. Merely removing, cleaning and replacing the transistors in the sockets would temporarily improve a failing P6042.

Finally, we switched to the AM503/A/B amplifier for TM500 series and used various compatible probes,
http://w140.com/tekwiki/wiki/AM503

The AM503/A/B amplifiers and P6302, P6303 and later A63xx probes are far superior in every aspect, especially DC stability and cable reliability. The connector allows use of a variety of probes reaching high currents.

You can find AM503 amplifiers cheaply but good probes are scarce and expensive. I believe no difference in P63xx vs A63xx versions of probes.

Just the ramblings of a retired EE after 50 years !

Enjoy,


Jon

Re: P6042 Current Probe Repair -- Need new probe cable

@0culus
 

On Sun, Oct 6, 2019 at 06:56 PM, snapdiode wrote:


You've picked an expensive hobby!
Well yes, but digging around sold items, the same probe is often sold billed as working for the same price as this guys untested/for parts listing.

Sean

Re: P6042 Current Probe Repair -- Need new probe cable

snapdiode
 

You've picked an expensive hobby!

Re: P6042 Current Probe Repair -- Need new probe cable

@0culus
 

On Sun, Oct 6, 2019 at 08:18 AM, snapdiode wrote:


Tektronix 175-0431-01
Thanks for the part number. I will keep a watch. I'm looking at a complete P6042 right now on ebay, but the seller wants quite a bit of money for it being untested.

Sean

Re: Passive Scope Probe Tip Assembly Replacement

Jan Kolek
 

Mr. Hanselman,

Thank you for your offer of assistance.

Just to be clear, I am in need of one (1) of Tektronix probe tip assembly P/N 206-0378-00, used in Tektronix oscilloscope probes P6137 and P5050.

I anxiously await your findings.

Regards,

Jan G Kolek

Re: Tektronix 555 oscilloscope indicator unit on eBay

John Williams
 

Funny thing is that all of his other stuff is like collectible household items ie junk. This is the only thing electronic he offers. I wonder if he just mispriced it, trying to put in $475 or something. Also I have seen this same item before around the cheaper price.

Re: P6042 Current Probe Repair -- Need new probe cable

Jean-Paul
 

Hello I may have that cable, it was removed from a P6042 but problem was elsewhere. I think the cable is OK.

Soonest I can access that storage is mid December if you can wait or dont find one before.

Please contact me off list if interested

Good luck


Jon

Re: Tektronix 555 oscilloscope indicator unit on eBay

Greg Muir
 

If I'm going to consider purchasing the 555 from this person I will have to ask them to let it sit in water for a bit longer.

Greg

Re: Tektronix 555 oscilloscope indicator unit on eBay

Dave Voorhis
 

On 6 Oct 2019, at 01:06, Jack Reynolds <jackandladyreynolds@...> wrote:

That's a steal compared to this: https://www.ebay.com/itm/Tektronix-knob-366-1400-01-Vertical-Sensitivity-5000-Series-oscilloscopes/271903057877 This guy is trying to sell one 5000 series knob for $8800.
That one looks like an advert for his “large assortment of unique and high quality test and measurement and electronics items for sale”, which if you send him a note as he asks, he’ll almost certainly give you a way to buy outside of eBay.

I’ve seen a fair bit of that with auto parts dealers, who’ll run an ad for a £500 lugnut or whatever but it’s just a way to get you to contact the seller.

Re: P6042 Current Probe Repair -- Need new probe cable

snapdiode
 

Tektronix 175-0431-01

Re: P6042 Current Probe Repair -- Need new probe cable

snapdiode
 

AFAIK they don't make this kind of cable. You'd need to check eBay for an official Tek cable assembly, they do show up like Halley's Comet once in a while...
Or you could remove the entire cable, pull out the broken wire, and fish in a new one with the proper wire pulling lube.

Re: Passive Scope Probe Tip Assembly Replacement

Lawrance A. Schneider
 

Hi,

If you have a few, I’d like one as well. Clearly JGK takes precedence over me.

Thanks, larry'

On Oct 6, 2019, at 1:01 AM, Stephen Hanselman <kc4sw.io@...> wrote:

Let me check stock on Monday, I have a crate of spare parts including several p/n’s of probe tips

Regards,

Stephen Hanselman
Datagate Systems, LLC
On Oct 5, 2019, at 14:46, jgkolek@... wrote:

Is anyone out there knowledgeable about probe tip assemblies?

I have a Tektronix P6137 which uses probe tip assembly 206-0378-00 (10X; 11.8 pF; 9M ohm). I am looking for an affordable tip replacement but haven't found any. I am considering using Caltest CT3667 (equivalent to 206-0441-00) as a substitute. Specs for CT3667/206-0441-00 are:10X; 8 pF; 9M ohm. I am assuming both tips have the same dimensions (both are 3.5 mm probe tips, and pictures I've seen online for both appear virtually identical other than the color of the tip end).

What kind of trouble will I have if I pursue this substitution? I am hoping I can simply screw in a CT3667 and adjust compensation for this substitution.

Regards,
JGK



Re: Tektronix 555 oscilloscope indicator unit on eBay

Dave Seiter
 

Over the years, I've seen a few of these types of items that have actually sold, and have never understood why.  I have a friend who thinks it's money laundering of some kind, but I'm not convinced.  
-Dave

On Saturday, October 5, 2019, 06:37:52 PM PDT, bobkrassa <bob@...> wrote:

Mostly ignorant sellers but some of this is people whose families have asked them to sell their collection and this allows them to show they are trying.
Bob Krassa AC0JL

Re: Tektronix 555 oscilloscope indicator unit on eBay

 

I'm afraid to ask how much he wants for the power cord for the 555?
Dennis Tillman W7PF

-----Original Message-----
From: John Williams
Sent: Saturday, October 05, 2019 3:45 PM

Some of you have probably noticed this on eBay by now. It is a 555 indicator unit, you have to provide your own cable and power supply. It is priced at a very reasonable $4750 US plus tax, license and shipping. However the tubes are included (apparently). Or you could buy say a pretty decent used car, or take the Mrs on a Caribbean cruise. Sorry if I am laughing too loud.

https://www.ebay.com/itm/TEKTRONIX-TYPE-555-DUAL-BEAM-OSCILLOSCOPE-1969-SERIAL-000631/143402679173?hash=item2163773b85:g:oJIAAOSwYsJdl79O



--
Dennis Tillman W7PF
TekScopes Moderator

Re: Tektronix 555 oscilloscope indicator unit on eBay

GerryR
 

Well, if you have an antique boat, you might want that old anchor to go with it!!

----- Original Message -----
From: "John Williams" <books4you@...>
To: <TekScopes@groups.io>
Sent: Saturday, October 05, 2019 6:45 PM
Subject: [TekScopes] Tektronix 555 oscilloscope indicator unit on eBay


Some of you have probably noticed this on eBay by now. It is a 555 indicator unit, you have to provide your own cable and power supply. It is priced at a very reasonable $4750 US plus tax, license and shipping. However the tubes are included (apparently). Or you could buy say a pretty decent used car, or take the Mrs on a Caribbean cruise. Sorry if I am laughing too loud.


https://www.ebay.com/itm/TEKTRONIX-TYPE-555-DUAL-BEAM-OSCILLOSCOPE-1969-SERIAL-000631/143402679173?hash=item2163773b85:g:oJIAAOSwYsJdl79O

Re: Passive Scope Probe Tip Assembly Replacement

Stephen Hanselman
 

Let me check stock on Monday, I have a crate of spare parts including several p/n’s of probe tips

Regards,

Stephen Hanselman
Datagate Systems, LLC

On Oct 5, 2019, at 14:46, jgkolek@... wrote:

Is anyone out there knowledgeable about probe tip assemblies?

I have a Tektronix P6137 which uses probe tip assembly 206-0378-00 (10X; 11.8 pF; 9M ohm). I am looking for an affordable tip replacement but haven't found any. I am considering using Caltest CT3667 (equivalent to 206-0441-00) as a substitute. Specs for CT3667/206-0441-00 are:10X; 8 pF; 9M ohm. I am assuming both tips have the same dimensions (both are 3.5 mm probe tips, and pictures I've seen online for both appear virtually identical other than the color of the tip end).

What kind of trouble will I have if I pursue this substitution? I am hoping I can simply screw in a CT3667 and adjust compensation for this substitution.

Regards,
JGK


P6042 Current Probe Repair -- Need new probe cable

@0culus
 

Hi all,

Got back to troubleshooting the P6042 again. When I left off I had determined that the red conductor in the probe cable is open. Suspecting it would be close to the amplifier due to previously observed failure of the strain relief tabs inside the amplifier chassis, I tried cutting some off the amplifier side in stages hoping to pass the break, but no dice. Honestly, the soldering job that was in there indicates to me that this had been done before, as it was rather messy.

Anyway, I think the best course is to simply replace to cable and probe with one that's know to be good. Any recommendations?

Thanks,

Sean

Re: Tektronix 555 oscilloscope indicator unit on eBay

bobkrassa
 

Mostly ignorant sellers but some of this is people whose families have asked them to sell their collection and this allows them to show they are trying.
Bob Krassa AC0JL

Re: Passive Scope Probe Tip Assembly Replacement

Jan Kolek
 

Brian,

Thanks for the info. I guess I am SOL. The options appear to be a) buy from Allied Electronics for $49 + shipping (before their supply is exhausted) or b) buy another complete P6137 probe with a good probe tip on eBay for even more $$.

Regards,
JGK