From Newark.com



MULTICOMP PRO MP720010 US 2-Channel 50MHz US$155.56

https://www.newark.com/multicomp-pro/mp720010-us/digital-storage-oscilloscope-50mhz/dp/10AH2393

 

FNIRSI 1013D US$165.99

100MHz 2-Channel
(Reviwers claim that it behaves more like a 30MHz oscilloscope.)

 

FNIRSI 1014D US$181.99

100MHz + Function Generator

 

Ham radio swap meets, local ads? Make sure it has been running for a while before you decide to buy; I was about to hand over cash for an old Tektronix when the display went funny and smoke came out. The price dropped to zero, so I took it home anyway; haven't fixed it yet.

 

Ham radio swap meets, local ads? Make sure it has been running for a while before you decide to buy; I was about to hand over cash for an old Tektronix when the display went funny and smoke came out. The price dropped to zero, so I took it home anyway; haven't fixed it yet.

What is the model of the Tektronix? Give us a shout if you need help fixing this.

 

I actually found the FNIRSI 1014D at US$ 167 at Amazon.
Includes 3 probes.
As a reviewer mentioned, there are Tektronix passive probes which are more expensive than this!!!

 

What is the model of the Tektronix? Give us a shout if you need help fixing this.

The key word was old so Rifa caps, 15V tants on 12V rails or prereg decided to throw in the towel.
All common failures with old gear.

 

FNIRSI 1013D US$165.99

100MHz 2-Channel
(Reviwers claim that it behaves more like a 30MHz oscilloscope.)

View attachment 299614

I bought one exactly like that one, and it's a neat piece of equipment. If you tell me how to test it, I can help you review it.

 

100MHz 2-Channel
(Reviwers claim that it behaves more like a 30MHz oscilloscope.)

View attachment 299614

I see they are US$30.00 on Aliexpress. free shipping

 

I see they are US$30.00 on Aliexpress. free shipping

I'll bite. I am going to order one just for the fun of it and see what happens.

 

Oops!
Too good to be true.
The $30 price is for one probe.
The full price is about $200.
Caught that just in time.

 

Hmmm... All I see is one channel 200kHz Finrisi. But still a good deal @ 30USD and less. I did see a nice one for less than 30 bucks but the shipping was almost 80 bucks. Common trick there.

 

Creative advertising.
Watch the options carefully when placing an order.
What you get for $30 is a single probe, not the DSO.
The DSO and all accessories is still about $200.

 

FNIRSI 1014D US$181.99

100MHz + Function Generator
View attachment 299617

This is another one that measures out around 30MHz. FNIRSI stuff looks good .. from a distance. In general FNIRSI are at a minmum dishonest.

 

These bargain priced DSO's generally all have one fault in common, poor sensitivity.

You might think their sensitivity will meet your needs and it may if you only use a high capacitance low BW 1x probe.
Connect a 10x low capacitance probe that any serious user does and it becomes a very different story.

 

The key word was old so Rifa caps, 15V tants on 12V rails or prereg decided to throw in the towel.
All common failures with old gear.

According to my notes, it's a 2213 (it's stashed away in storage). The display went bright and fuzzy as the smoke started. Last time I searched, I found a couple of discussions that also talked about bad caps:
https://www.eevblog.com/forum/repair/tektronix-2213a-psu-problem/
https://antiqueradios.com/forums/viewtopic.php?f=8&t=310487

https://w140.com/tekwiki/wiki/2213
says it was introduced in 1982, so that makes it new compared with my previous oscilloscopes (Eico, Telequipment).

 

I am very familiar with the Tektronix 2213. Let me know if you need help with this.
If you are going to attempt a repair on this, start a new thread in the Technical Repair forum.

 

I actually found the FNIRSI 1014D at US$ 167 at Amazon.
Includes 3 probes.
As a reviewer mentioned, there are Tektronix passive probes which are more expensive than this!!!

Indeed, the Tek P6139B sells at around $670 US. On the other hand, it is likely to considerably exceed it's specifications rather than drastically fail to meet them. There are other considerations too, such as traceability, reparability, durability and so on. Not that all of us need a 500MHz passive probe whose performance will literally stand up in a court of law, but some people do.

 

FNIRSI 1014D US$181.99

100MHz + Function Generator
View attachment 299617

When I got into the links, the system shows that as below:
(The system was shown in Chinese)
Currently unavailable
We do not know when or when this item will be back in stock.

 

FNIRSI 1013D US$165.99

100MHz 2-Channel
(Reviwers claim that it behaves more like a 30MHz oscilloscope.)

View attachment 299614

I bought a used IWAZU oscilloscope ss-7810 100Mhz about 8 or 10 years ago and it already cost about $258, so if it doesn't pass the test, then who can guarantee that it can actually measure to 100Mhz?

If it can actually measure to 100Mhz, it's really worth it.