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Comparative Analysis: Feel Tech FY-6600-60M vs FY-6800 Arbitrary Generators

Thorgus 6027 14
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  • #1 17409198
    Thorgus
    Level 12  
    FY-6600-60M - usually has a weak power supply, but you can replace it with something better
    https://www.eevblog.com/forum/testgear/waveform-generaters-fy6600-vs-jds6600/

    Page no. 45 specification of FY-6600-60M
    http://gotronik.pl/img/FY6600_Series_Users_Manual.pdf
    Specification of FY-6800:
    http://en.feeltech.net/index.php?case=archive&act=show&aid=61

    I only include 60MHz models

    The cost of the FY-6600 is PLN 285-290 and the FY-6800 is about PLN 325, are the parameters significantly better?
    Is it worth replacing it with a higher model from your experience? Are these features useful?
    Do you use the potential of your generators?

    Anticipating the questions:
    1) I know it's a Chinese generator and the quality of the components is not high
    2) I know that it has a power supply that is not of the highest quality and the device itself is high end
    3) generators on a well-known auction site are significantly more expensive and appear very rarely - I searched and did not find
    4) I could build a generator but I don't want to do it because I need it for another project, the purpose is to use it, not build it
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  • #2 17410675
    allanrid
    Level 13  
    I gave 445 PLN for FY-6800. For my home made :-) needs very ok. Before, I was thinking about a Rigola generator, but I came to the conclusion that if I need something better, I will buy the generator for a month. Unfortunately work, work. So only after September 15th will I be able to play with it more.
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  • #3 17410842
    Thorgus
    Level 12  
    In the budget of about PLN 500 it is the only option, when used it is quite rare
    there were siglents and rigoles but rather of similar functionality

    Will you share your opinion? Are you using an arbitrary generator or just a sine?
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  • #4 17419291
    barti10
    Level 16  
    On eevblog there is a very large topic about these generators and I strongly advise you not to buy 6600. It has a software error and when buying on Ali ... you do not know what version of the software "you will get". scrap "for 4 hundred pounds. How to buy is only 6800 (although it is not known whether "something" will come out with time).
  • #5 17420577
    Thorgus
    Level 12  
    What is the software bug?
  • #6 17421772
    barti10
    Level 16  
    The error is related to ver. 3.0 and 3.1 The generator works great and suddenly the device can work but there are no signals at the output and then it won't start anymore. Someone wrote on eevblog that as part of the repair he received a new front panel from the manufacturer with a control processor, but in general the warranty is lame. The manufacturer absolutely does not care about repairing broken devices! Regarding 6800 so far, there are no comments, though it is clone 6600
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  • #7 17424362
    Thorgus
    Level 12  
    Does this only apply to V3.0 and V3.1? Are there other bugs and risks?
  • #8 17425594
    barti10
    Level 16  
    Regarding v3.2 no one reported spills. Several owners have reported the problem that the main sysem clock is of terrible quality and after replacing it with a branded oscillator there is a definite improvement in the stability of the generated signals. There is also a very poor power supply for modification or replacement.
  • #9 17438976
    Thorgus
    Level 12  
    Could you give us a source that you know about oscillator problems? How to replace it?

    What to replace the power supply? I have a very good 12V 30A, but it's probably a slight exaggeration :)
  • #10 17439241
    barti10
    Level 16  
    Everything I wrote about before, I know from the topic on EEVblog. There is a very large topic about this generator (there is absolutely nothing on the Polish net) with advice, photos and various "patents" that people do with them or are constantly trying to fix "dead" arts. Many owners replace the poor impulse power supply with a linear equivalent (there is a lot of space) and one user wrote about the oscillator that it swims a lot and others agreed that it would be good to replace it. He showed pictures of his copy and it follows that a simple replacement is enough, he also gave the symbol he used.
  • #11 17439318
    Thorgus
    Level 12  
    If mine will have the appropriate software version, I will also replace the power supply and oscillator
  • #13 17456236
    Thorgus
    Level 12  
    Yes, but it has a damaged USB connector:?

    soft ver. 3.3
  • #14 17457343
    allanrid
    Level 13  
    Thorgus: So you bought the FY-6600. Where did you buy and why did you choose the FY-6600. How can you be sure that the beaten USB? I don't know about the FY-6600 but my 6800 works averagely with the Signal PC Software DDS.
  • #15 17476259
    Thorgus
    Level 12  
    Why - the cheapest arbitrary generator on the market
    How can I be sure - I will examine the D + and D- pins from the USB with the oscilloscope and I will be sure what is going on

    I will let you know when I can exchange something
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Topic summary

✨ The discussion centers on a comparative analysis of the Feel Tech FY-6600-60M and FY-6800 arbitrary waveform generators. Users express concerns about the FY-6600's weak power supply and software issues, particularly in versions 3.0 and 3.1, which can lead to malfunctioning outputs. Recommendations suggest that the FY-6800 is a better option due to its improved reliability, although it is noted that it is a clone of the FY-6600. Users discuss potential modifications, including replacing the power supply with a linear equivalent and upgrading the oscillator for better signal stability. The FY-6800 is generally viewed as a worthwhile investment for those needing a reliable generator, especially given its price point compared to alternatives like Rigol and Siglent.
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FAQ

TL;DR: FY‑6600 costs 285–290 PLN vs FY‑6800 about 325 PLN; “FY‑6600‑60M—usually has a weak power supply.” Choose FY‑6800 if possible. [Elektroda, Thorgus, post #17409198]

Quick Facts

What’s the better buy under 500 PLN: FY‑6600‑60M or FY‑6800?

Pick the FY‑6800 if you can. Community feedback warns against the FY‑6600 due to a known firmware risk. One experienced user put it plainly: “How to buy is only 6800.” This reduces your chance of facing a bricked unit. [Elektroda, barti10, post #17419291]

What’s the FY‑6600 firmware bug people warn about?

Affected units on v3.0/v3.1 may work, then suddenly output no signal and refuse to start again. One report states: “The generator works great and suddenly … there are no signals at the output and then it won’t start anymore.” Warranty handling was described as weak. [Elektroda, barti10, post #17421772]

Is FY‑6600 firmware v3.2 considered stable?

Owners reported no “spills” on v3.2 in the referenced discussion. That version reduced fear of sudden, unrecoverable failures. Hardware quality concerns, like clock and PSU, still motivated upgrades for better stability. [Elektroda, barti10, post #17425594]

How do I check what firmware version my FY‑6600 has?

Power the unit and check the on‑screen info. Users reported the device shows “soft ver.” on the display, such as “soft ver. 3.3.” You can note that value before deciding on upgrades or usage. [Elektroda, Thorgus, post #17456236]

What hardware weaknesses do owners fix first?

Power supply and clock. “Many owners replace the poor impulse power supply with a linear equivalent,” and several report better frequency stability after swapping the system oscillator for a branded one. Space inside the case supports these mods. [Elektroda, barti10, post #17439241]

Is the FY‑6800 truly different from the FY‑6600?

It was described as a clone of the FY‑6600. At the time of discussion, there were fewer negative reports about the FY‑6800, but long‑term differences were still unclear. [Elektroda, barti10, post #17421772]

How do I verify a dead USB port on the FY‑6600/FY‑6800?

Try this quick check:
  1. Connect to a PC and attempt control using the vendor’s USB interface.
  2. Probe the USB D+ and D− pins with an oscilloscope during connection attempts.
  3. If signals are present but unstable, inspect and rework the connector or cabling. [Elektroda, Thorgus, post #17476259]

Do these generators support arbitrary waveforms, and is that feature useful?

Yes. The FY‑6600 series supports arbitrary waveforms in addition to standard sines and squares. You can load custom shapes through the PC software workflow described in the manual. This enables device stimulation and repeatable test patterns. [FY6600 Series User Manual]

What did other users pay for the FY‑6800?

One user reported paying 445 PLN for a new FY‑6800. This aligns with the thread’s view that FY‑6800 sits slightly above FY‑6600 in price but remains budget‑friendly. [Elektroda, allanrid, post #17410675]

Are there viable used alternatives like Rigol or Siglent under 500 PLN?

With a 500 PLN budget, these FeelTech models were considered the only realistic option then. Used Siglent or Rigol units appeared rarely and offered similar functionality at higher or inconsistent prices. [Elektroda, Thorgus, post #17410842]

How good is the PC software support?

A user reported the FY‑6800 “works averagely” with Signal PC Software DDS. Expect basic control, but not polished integration. USB communication quality can further influence your experience. [Elektroda, allanrid, post #17457343]

Which single upgrades give the biggest day‑one benefit?

Two standouts: replace the main clock with a branded oscillator for better stability, and swap the stock PSU for a linear unit. Users observed “a definite improvement in the stability of the generated signals” after the clock change. [Elektroda, barti10, post #17425594]

Where can I find community fixes, photos, and step‑by‑steps?

Check the large EEVblog thread referenced in the discussion. It includes advice, teardown photos, and repair anecdotes, including attempts to revive bricked units. Expect practical, field‑tested ideas and part suggestions. [Elektroda, barti10, post #17439241]
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