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I'd choose my own selection over some other random internet person every time.
Too many self proclaimed experts appear on a whole range of subjects, then many sheep start to follow and believe.

Hi Michael
Could you tell me which pot you are refering to?
I also have the problem of the horizontal size of the sweep not going fully to the left.
thanks

On Mon, Apr 7, 2025 at 01:49 PM, Clark Foley wrote:

Jim,
This is not your “typical” probe to BNC adapter. It is used for the P5102
(1kV), which I presume is what Jared has. I don’t know where else it might
be used. For those who have not seen it, start with the P5102 manual, page 4.



By the way, there are two of the more conventional adapters for $4 and $12
from DigiKey.

This is correct. The adapter might be used for other P51xx series probes? but I have a few P5102 probes for my THS700 series scopes and would like to get everything all adjusted and straightened out.

I cooouullddd jury-rig something on the bench with wire and tape, but if I can buy/build/steal something to do it 'properly' that would be ideal.


Thanks!
Jared.

Jim,
This is not your “typical” probe to BNC adapter. It is used for the P5102 (1kV), which I presume is what Jared has. I don’t know where else it might be used. For those who have not seen it, start with the P5102 manual, page 4.



By the way, there are two of the more conventional adapters for $4 and $12 from DigiKey.

5mm to BNC? These are from tek, built by Amphenol:



JimMc

Get a refund. Top dollar for a 577 with no CRT is a show stopper.

Glydeck. KD6NEW

On 4/6/25 18:41, ryanhart via groups.io wrote:

Good tips, thanks.

It helps to reference a little of the previous email's content cut and pasted into your email so we know what it's about...

Alex,

Where are you located? I may have one. I’m in the Los Angeles area.

George KD6NEW

Sorry, I forgot to add - I'm in Florida. I'd be willing to drive several hours to pick one up, or pay for shipping.

Good tips, thanks. I'll look into my ebay resolution options further. I have sent a message to the seller via ebay with a picture.

"No glass" means literally that - the glass vacuum envelope is gone. You can see the broken off shards at the base of the CRT. And because the broken glass is not in the shipping box or the 577 chassis, I believe it must have been installed in this condition.

The A/B switch is more or less intact. It's off center (in the off position) and not as long as original, but it does work.

On both of my 7854's the SQR light is lit whenever I turn them on unless it BPIB cable is connected and live. Disable the GPIB interface (Switch 1 to 0) to turn off the light?

Mark
W7HPW

Real Radios Glow in the Dark

Hi all,

I'm currently searching for a 013-0291-02 (or -00, -01 etc if they exist) probe to BNC adapter that isn't going to cost me a left kidney and first-born son...

It looks like this:


If anyone has one of these to sell and can ship to Japan, please let me know!
Or even if you could take some good photos and measurements and help to examine its construction, in the off chance a DIY reproduction could be made...



Thanks!
Jared

On Sun, Apr 6, 2025 at 01:09 PM, Jim Adney wrote:

Hmmm, I didn't know this was ever a possibility. Can you give some examples of
DVMs that have this "feature", where there's no blocking capacitor on the AC
input?

===
I am sure there are others too but Agilent U1272A and HP3466A are two examples with AC only or AC+DC options.
Ozan

On 4/6/25 15:54, ryanhart via groups.io wrote:

should I buy a CRT and fix this one? Or should I try to get a refund and keep looking?

The CRTs come from 5xxx scopes, right? If not in a rush, that could be inexpensive.

With ebay, and a seller that sends out broken when advertised as "used", you
are likely to be able to get all the money back and keep it too. Document with photos and
attach them to ebay message to the seller. You can probably negotiate to keep it all and
for less than the usual price of the 177 fixture...

If they are slow to respond, go ahead and file it as a not as described claim.
If they don't respond you get to keep all.

Also, knowing what part of the world you're in might help us to suggest
other places to look.

Dave Casey

On Sun, Apr 6, 2025 at 5:17?PM Dave Daniel via groups.io <kc0wjn=
[email protected]> wrote:

If I understand correctly, the CRT is smashed (I don't quite understand
what "no glass" means). For that reason, I'd ask for a refund, since there
a couple on ebay for comparable prices.

Just out of curiousity, is the A/B toggle switch lever on the 177 intact? I
have three of those and all three have the switch lever broken off.

DaveD
KC0WJN


On Sun, Apr 6, 2025 at 17:54 ryanhart via groups.io <ryanhart=
[email protected]> wrote:

I recently bought a 577 D1 curve tracer with a 177 text fixture on ebay
for $845. It was described as being in working condition, but it's not.

The

CRT has no glass in it. There is also no broken glass in the thing, so

the

CRT was installed this way. Otherwise, it seems to be if fair condition.
Collector voltage is lower than selected by 10 to 15%, one knob is

missing,

and one is cracked. Otherwise, not too bad. My question is this: For the
money that I've already got in it, should I buy a CRT and fix this one?

Or

should I try to get a refund and keep looking? In either case, any
suggestions on where to look (other than ebay)?

Thanks in advance.

Ryan

If I understand correctly, the CRT is smashed (I don't quite understand
what "no glass" means). For that reason, I'd ask for a refund, since there
a couple on ebay for comparable prices.

Just out of curiousity, is the A/B toggle switch lever on the 177 intact? I
have three of those and all three have the switch lever broken off.

DaveD
KC0WJN


On Sun, Apr 6, 2025 at 17:54 ryanhart via groups.io <ryanhart=
[email protected]> wrote:

I recently bought a 577 D1 curve tracer with a 177 text fixture on ebay
for $845. It was described as being in working condition, but it's not. The
CRT has no glass in it. There is also no broken glass in the thing, so the
CRT was installed this way. Otherwise, it seems to be if fair condition.
Collector voltage is lower than selected by 10 to 15%, one knob is missing,
and one is cracked. Otherwise, not too bad. My question is this: For the
money that I've already got in it, should I buy a CRT and fix this one? Or
should I try to get a refund and keep looking? In either case, any
suggestions on where to look (other than ebay)?

Thanks in advance.

Ryan

I recently bought a 577 D1 curve tracer with a 177 text fixture on ebay for $845. It was described as being in working condition, but it's not. The CRT has no glass in it. There is also no broken glass in the thing, so the CRT was installed this way. Otherwise, it seems to be if fair condition. Collector voltage is lower than selected by 10 to 15%, one knob is missing, and one is cracked. Otherwise, not too bad. My question is this: For the money that I've already got in it, should I buy a CRT and fix this one? Or should I try to get a refund and keep looking? In either case, any suggestions on where to look (other than ebay)?

Thanks in advance.

Ryan

OTOH, I am considering buying a guitar amplifier kit for my son who just
bought himself an electric guitar.? In that case, it will take more time to
assemble the kit than if we went to Guitar Center, say, and bought a working
amp.? But the cost of the kit is considerably less than that of the
off-the-shelf amp.? The tradeoff in reverse.? And since I've been a
professional EE for almost 37 years and have been soldering since I could pick
up an iron, assembly and test are no issues.? And the dad-and-son time
assembling the kit together is a huge bonus (Heathkit, I miss you from the
1970s when I was a kid).

If the kit is one those 5F1 Fender Champ all tubes amp, they are tons of fun to assemble.
Plus, you can source better quality parts, etc.
Also, effect pedals are a very good way for a kid to get into electronics.

Sorry for the politics earlier; I'll quit with it.
Back to TekScopes related stuff, regarding kits vs. DIY, it's the usual tradeoff between time and money.? Those of us who are not yet retired tend to have more money than time.? Those who are retired tend to have more time than money.? Parts kits save you time, at the expense of some profit for people like Menachem who put in the effort to put the kits together.
OTOH, I am considering buying a guitar amplifier kit for my son who just bought himself an electric guitar.? In that case, it will take more time to assemble the kit than if we went to Guitar Center, say, and bought a working amp.? But the cost of the kit is considerably less than that of the off-the-shelf amp.? The tradeoff in reverse.? And since I've been a professional EE for almost 37 years and have been soldering since I could pick up an iron, assembly and test are no issues.? And the dad-and-son time assembling the kit together is a huge bonus (Heathkit, I miss you from the 1970s when I was a kid).
Different types of kits for different purposes.
HTH.
Jim FordLaguna Hills, California, USA