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"Tektronix Type 575 Transistor Curve Tracer. Functional when last used. Probably could use some new tubes and calibration. With light shield, some test sockets, and complete instruction manual including schematics. Closed the business, no longer need it."



As usual, no relationship, don't know any more etc...


Pete

Hello,

tried to get the guys email addy, but the Craigslist web site is not willing to let me in.


I would gladly pay for shipping. The 575 is the last of the Danaher curve tracers I still miss for my upgrade project.


Tam

--
With best regards
Tam Hanna
---

NEW: Enjoy electronics? Like seeing oscilloscopes get repaired? Please subscribe to my new YouTube channel ->

Hi Tam,



If you cannot get that one I have one that is in excellent working condition for 175.00.



73,



Bill, WA2DVU

Cape May, NJ



From: TekScopes@... [mailto:TekScopes@...]
Sent: Wednesday, December 13, 2017 10:12 AM
To: TekScopes@...
Subject: [TekScopes] Re: Tektronix Type 575 Transistor Curve Tracer - $75 (Syracuse)





Hello,

tried to get the guys email addy, but the Craigslist web site is not
willing to let me in.

I would gladly pay for shipping. The 575 is the last of the Danaher
curve tracers I still miss for my upgrade project.

Tam

--
With best regards
Tam Hanna
---

NEW: Enjoy electronics? Like seeing oscilloscopes get repaired? Please subscribe to my new YouTube channel ->





[Non-text portions of this message have been removed]

Tam,
Here is the Craig's list info;
contact name:
Ron
call
? (315) 446-5064
reply by email:
6gt28-6421973174@...
webmail links:
gmail
yahoo mail
hotmail, outlook, live mail
aol mail
copy and paste into your email:
6gt28-6421973174@...

Sent from my iPad

On Dec 13, 2017, at 2:47 PM, bill.riches@... [TekScopes] <TekScopes@...> wrote:

Hi Tam,

If you cannot get that one I have one that is in excellent working condition for 175.00.

73,

Bill, WA2DVU

Cape May, NJ

From: TekScopes@... [mailto:TekScopes@...]
Sent: Wednesday, December 13, 2017 10:12 AM
To: TekScopes@...
Subject: [TekScopes] Re: Tektronix Type 575 Transistor Curve Tracer - $75 (Syracuse)

Hello,

tried to get the guys email addy, but the Craigslist web site is not
willing to let me in.

I would gladly pay for shipping. The 575 is the last of the Danaher
curve tracers I still miss for my upgrade project.

Tam

--
With best regards
Tam Hanna
---

NEW: Enjoy electronics? Like seeing oscilloscopes get repaired? Please subscribe to my new YouTube channel ->

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]

IMPORTANT: This is a MOD C122 575. That is special. It goes to 400V instead
of the more common (non-mod) version. That is definitely worth $75.

Dennis Tillman W7PF

IMPORTANT: This is a MOD C122 575. That is special. It goes to 400V instead
of the more common (non-mod) version. That is definitely worth $75.

=========================================================


575 has a 20/200V range.

575 Mod 122C has a 20/200/400 and 1.5KV range.


Rolynn

I don’t live too far away so I called the guy and he said it’s sold, hope someone here got it.

Brad

I live in Vermont, 5 hours away, but have a nephew close to Syracuse. He picked it up for me last night. I couldn’t resist the bargain.



Matt



From: TekScopes@... [mailto:TekScopes@...]
Sent: Friday, December 15, 2017 4:28 PM
To: TekScopes@...
Subject: [TekScopes] Re: Tektronix Type 575 Transistor Curve Tracer - $75 (Syracuse)





I don’t live too far away so I called the guy and he said it’s sold, hope someone here got it.

Brad





[Non-text portions of this message have been removed]

I live in Vermont, 5 hours away, but have a nephew close to Syracuse. He picked it up for me last
night. I couldn?t resist the bargain.



Matt

Well done Matt. That is a copper bottomed bargain.

Craig

Great value and easy to maintain.



Sent from my iPad

On Dec 16, 2017, at 7:05 AM, 'Craig Sawyers' c.sawyers@... [TekScopes] <TekScopes@...> wrote:

I live in Vermont, 5 hours away, but have a nephew close to Syracuse. He picked it up for me last
night. I couldn?t resist the bargain.



Matt

Well done Matt. That is a copper bottomed bargain.

Craig

[Non-text portions of this message have been removed]

On 12/16/2017 10:05 AM, 'Craig Sawyers' c.sawyers@... [TekScopes] wrote:

I live in Vermont, 5 hours away, but have a nephew close to Syracuse.

He picked it up for me last

night. I couldn?t resist the bargain.



Matt

Well done Matt. That is a copper bottomed bargain.

I'm just surprised it lasted as long as it did.

Vince.
--
Michigan VHF Corp.

On 12/16/2017 10:26 AM, Lydecker glydeck@... [TekScopes] wrote:

So sweet, almost makes me want to get back into tubes again.

- Bert

A note to owners of 575 curve tracers.

I bought one a few years ago and have use occasionally ever since. I left it on one afternoon and after a few hours I noticed an old familiar smell, not rotten eggs nor dead mice but the aroma of cooking transformers.? I traced it to the 575 and immediately switched it off.? The power transformer was too hot to touch and a large puddle of brown goo was oozing out of the corner of the bottom cover.? The 4A power line fuse, F601, did not blow.? I let it cool and tried it again, too late, the power transformer was toast.? I replaced the 120-095 transformer with a later model 120-0095-01 and proceeded to check all the semiconductors that might have shorted and ruined the transformer.? I found D241D to be a dead short from pin 16 to pin 15 through the shorted filter cap C244.? The manual shows two 5A fuses, one in each leg from pins 14 and 16 of the power transformer, these fuses were not present.? I installed a fuse in each leg by mounting the fuse holder on standoffs on the corners of the transformer.? This was a good time to replace all the old filter capacitors and all the small electrolytics and black beauty caps as well.? I increased the filtering caps in the -15V supply from 8000uF to over 10,000uF.? The 575 now works well.? I also installed an LED in series with a 1K resistor in parallel with the fuses, it will glow if the fuse is blown.

MOTTO:
If you have a 575 make sure that F240 and F241 are present or be prepared to replace the power transformer some day.

Reed Dickinson

A note to owners of 575 curve tracers.

?The manual shows two 5A fuses, one in each leg from pins 14 and 16 of the power transformer,

====================================================================


Just checked all my manuals for the 575 and found that this change occurred at SN X8030

If your 575 SN is below 8030 then this is an important change.

Manual shows the fuses to be Fast Blow with pigtails.


Rolynn

I finally picked up the 575 Curve tracer from my nephew. Before I plug it in and turn it on and look for smoke, is there anything I should do? I don't have a variac. I haven't restored and old piece of equipment like this, but I vaguely remember using one way back in the 70's.

Thanks!
Matt

On the mechanical side of things, have a look at the fan assembly under the left side cover in the back of the 575.
The fan mounts are little rubber widgets with a threaded stud coming out of both ends. If the little mounts are broken use some Ty-wraps or whatever to roughly hold it all in place and centered until you buy some new mounts. McMaster-Carr has the exact replacements in stock as do other companies.
Then see if the fan turns easily. There is an oil hole at both ends of the fan motor that should be facing upward, if not rotate the whole fan assembly in its mounts and oil it with some good sewing machine oil or equivalent. It might take a little playing with the fan motor to get it all loosened up and oiled properly.
Then I'd have a good look around under the covers, then maybe do some cleaning while you wait for some advice about applying power to your 575.

As Tom said, a working fan is important. Another thing to check is the fuse. Make sure it is the correct rating. It could be wrong due to people borrowing the fuse at some point and replacing it with the wrong value, or because there is/was an actual problem in the instrument, and somebody decided to increase the fuse rating rather than diagnosing the excessive current flow. A lot of stuff could have happened during the life of a 575. In any case, I recommend checking the fuse, particularly since it is so easy, and could prevent a variety of unnecessary and irreversible damage when power is applied.

-Kurt

Also, the type of mod that Reed Dickinson mentioned in message #142737 makes sense nowadays, as replacement parts are harder to get. Maybe the extra complexity of internal fuses wasn't justified when the 575 was in active production, but now it makes sense. I've also thought about adding crowbar circuits to prevent damage in case of a power supply fault that causes a over-voltage condition. But I've never actually seen that happen in a Tek instrument, so I haven't added any crowbars. I worry about this sort if thing particularly with, for example, a 567, where the plug-in (Type 6R1 or 6R1A) is complicated and relatively rare.

I happen to have the 575 , when i got it i did lube the fan and worked it till it was pretty free , next i used my lcr meter to check the caps , confirmed all tubes were present then brought it up on variac . You could use dim bulb test to limit current and then go from there , just pay attention to any thing that seems strange , like smoke or burning and you should be fine? , there is a delay for main power to kick in about 30sec or so then you should see something on crt . Hope this helps , good luck .

Sent from Yahoo Mail on Android

On Sat, Mar 24, 2018 at 12:05 PM, Kurt Rosenfeld<kurt.harlem@...> wrote: As Tom said, a working fan is important. Another thing to check is the fuse. Make sure it is the correct rating. It could be wrong due to people borrowing the fuse at some point and replacing it with the wrong value, or because there is/was an actual problem in the instrument, and somebody decided to increase the fuse rating rather than diagnosing the excessive current flow. A lot of stuff could have happened during the life of a 575. In any case, I recommend checking the fuse, particularly since it is so easy, and could prevent a variety of unnecessary and irreversible damage when power is applied.

-Kurt

Let's not forget the 575 is valved/tubed. Almost. There are two transistors (one off 2N2148 and one
off 2N277).

So - how would you power up a say a 545A? Personally, I just turn it on.

Craig