The distortion seen in the waveform looks like crossover distortion to me. It's almost as if the output stage of the TI part does not have enough internal forward current/bias to keep the internal output device "turned on" during the transition in polarity/direction at the higher frequencies. Just my $0.02. Hope that you're having a good Memorial day IMSAI Guy. Thank you for sharing! Fred
I like how you went from being disappointed to happy and enthusiastic at the end. For the super high current drive case how about adding a circuitry for even higher current pass mosfets? The device you have is an opamp after all.
If +-15V swing and 1A is sufficient (more current can be achieved by paralleling), then the LT1210 is a fantastic chip. You can easily achieve a bandwidth of over 10Mhz at 1A! I have bought 10 pieces on Ebay (from adeleparts2010) for only 8€ including shipping, they were a bit corroded and needed some extra flux to solder, but appear to be the real deal. Much fun to play with, and very very cheap that way.
@@IMSAIGuy Hello, thanks for the nice Video. What kind of PS you choose for yours? Can two switching power supplies like this de.aliexpress.com/item/1005001626749980.html?spm=a2g0o.productlist.0.0.425347daAT1TE0&algo_pvid=86d25c54-e6d2-4d51-bac1-08c29117eb3e&algo_exp_id=86d25c54-e6d2-4d51-bac1-08c29117eb3e-15 can be used? best regards
Cont. of below comment: part 2 (my ps4 starts serious lag if one msg gets lengthy) How to make a high freq. signal with freq. adjustment that can push a large current at moderate voltages (option to set this voltage as well would be amazing, but not absolutely necessary) but have a DC-like one directional flow where the + - terminals do not alternate and stay that polarity??? Its also likely a high V signal with low current and high freq. would also work, where the ratio of H2 gen. from free radical vs. current flow would be higher. This would actually be preferred as power consumption would be lower per amt of H2 made as this much larger potential would generate a much stronger field, but several side problems arise in the chemistry at high V in an e.cell like undesired side reactions/products, heat build up, and electrode degredation to name a few. Ultimately id love to do both and compare and find the sweet spot in between, but for now i just need the first (unless a high V low I version would be easier to achieve). Ive been stuck here for a long frustrating amount of time; if anyone can tell me whether this is achievable as DIY, or if there's purchasable items im unaware of inexpensively that do this, any vids or further info somewhere to point me to...Id very much appreceiate a comment responce with a how to or any of the above to help me finalize this build. Thanks for your time to read all this and hopefully someone better in this particular field can help. Good day all
PLEASE HELP, ANYONE READING!! Read fully for the full scope of situation please.... Could you just use a lower current version that is capable of the higher frequencies (dont know shat thatd be, but it seems some exist they just cant drive larger currents), then feed this signal in as the control to a second stage driving some type of further amplification through a bank of power MOSFETS or similar components to push more current into the signal?? Similar to how a high watt sub audio amp can push huge corrents? Probably not MOSFETs specifically i dunno, im not on this level of full understanding yet...but im so close!! Lol...but whatever component needed use several in 'parallel'** (? I think) to add current from each in a bank that could drive very large currents, as you see 4 or 8 in a row on a 1-2kW car amp. Is the problem in the limitations of high power transistors not being able to switch fast enogh at such frequencies? Reason: ive a genius idea for much higher yield/efficiency for H2 generator via electrolysis (Im a MS chem. engr, so I know moderate electronics but the whole picture has yet to "click" for me when combining these subsets of components into larger networks how it all works together etc). This is usually low V DC with large currents, however h2 gen. is proportional to how much current is used as it supplies the e- for the redox rxn. I through experiments on small scale have all but shown myself my thought of generating *extra H2 gas without requiring more current is possible by inducing *mechanical bond breaking, inducing free radical reactions which gen H2/O2 without more power input (the current draw actually reduces in most runs). This is achieved by taking advantage of waters polar properties and the strong E-field between two close electrodes. The water will lign up in the field as magnets would in a B field...but this does nothing to break bonds. However, if a high freq. signal is used that is a harmonic of water's bond vibrations, the pulsing field intensifies this to the point they can cleave non ionically as a free radical, which will rearrange into H2/O2 (same happens at - terminal when O takes an e- and thus releases the H. radicals which then form H2 and two OH- etc) but unlike the electrode redox rxns, this does not consume power by using electron transferring mechanisms...Long story to try to explain but my ultimate point is: I need to build an "amp" if you will, that can drive this electrolysis cell with low voltages but be able to deliver larger currents with a semi-adjustable frequency control to fine tune in the resonant frequency. Most importantly though its an AC like signal, but I need the final output to the electrodes to be *DC offset...as in rather than a forward-backward oscillating current i need a high max to zero oscillation with a DC behavior as in current only flows one direction and the electrodes polarity does not change. This is crucial to keep molecules oriented in same direction to feel the "vibration" rather than spinning 180 degrees everytime the signal reverses (this would only heat the solution not create free radical degredation). Ive seen a significant sudden increase in gas gen. on small tests, but i need to scale up. Is this type signal doable as DIY??? Ive a tiny budget, and came a long way in progress to be stuck at the very end lacking knowledge to build such a circuit.
From Kepco: motor testing, testing of magnetic components (coils, speakers, etc.), industrial applications with inductive loads, driving CRT coils, cryogenic applications and powering correcting magnets for medical imaging applications or particle accelerators solar cell/panel testing, driving and testing piezo-electric devices, capacitor testing, driving and testing capacitive transducers, and power for industrial or lab applications with capacitive or capacitive-resistive loads
@@IMSAIGuy I must have been needing sleep when I watched this video. I could have sworn you said you picked it up for $8 or $18 on eBay. In any case, the statement is generally true. :)
The design engineer from manufacturing answer about devices problems reminds me of the old cartoon poster of the evolution of a product. If it fits an works good for us, if it doesn't, your on your own. Thanks for the look. Hope to see your stages of build an applications.
Well, I am sorry that the part under-performed for quality. It seems pretty tough, though.
I think it will be just fine for what I want to use it for. I've ordered two 24V 5A supplies for it
The distortion seen in the waveform looks like crossover distortion to me. It's almost as if the output stage of the TI part does not have enough internal forward current/bias to keep the internal output device "turned on" during the transition in polarity/direction at the higher frequencies. Just my $0.02. Hope that you're having a good Memorial day IMSAI Guy. Thank you for sharing! Fred
I was thinking the same thing, resembles crossover distortion due to location, but differs in character.
Yeah this looks similar to crossover distortion sometimes seen in LM358 /LM324 circuits
What would happen if the snubber was as close to to the IC as possible and shorter component leads? Would that help.
Zobel Network (10 ohm + 0.1uF in series) if driving loudspeakers.
I like how you went from being disappointed to happy and enthusiastic at the end. For the super high current drive case how about adding a circuitry for even higher current pass mosfets? The device you have is an opamp after all.
If +-15V swing and 1A is sufficient (more current can be achieved by paralleling), then the LT1210 is a fantastic chip. You can easily achieve a bandwidth of over 10Mhz at 1A! I have bought 10 pieces on Ebay (from adeleparts2010) for only 8€ including shipping, they were a bit corroded and needed some extra flux to solder, but appear to be the real deal. Much fun to play with, and very very cheap that way.
great video. how does it preform using a single power supply? do you see the same glitch?
Hmmm. good question. I'm currently working on a box for it with 24V 5A supplies. I need the +/- for DC motor work.
@@IMSAIGuy Hello, thanks for the nice Video. What kind of PS you choose for yours? Can two switching power supplies like this de.aliexpress.com/item/1005001626749980.html?spm=a2g0o.productlist.0.0.425347daAT1TE0&algo_pvid=86d25c54-e6d2-4d51-bac1-08c29117eb3e&algo_exp_id=86d25c54-e6d2-4d51-bac1-08c29117eb3e-15 can be used? best regards
I hope that you will try to revisit this subject when a better part becomes available at some point.
I will. let me know if you find one.
Cont. of below comment: part 2 (my ps4 starts serious lag if one msg gets lengthy)
How to make a high freq. signal with freq. adjustment that can push a large current at moderate voltages (option to set this voltage as well would be amazing, but not absolutely necessary) but have a DC-like one directional flow where the + - terminals do not alternate and stay that polarity???
Its also likely a high V signal with low current and high freq. would also work, where the ratio of H2 gen. from free radical vs. current flow would be higher. This would actually be preferred as power consumption would be lower per amt of H2 made as this much larger potential would generate a much stronger field, but several side problems arise in the chemistry at high V in an e.cell like undesired side reactions/products, heat build up, and electrode degredation to name a few. Ultimately id love to do both and compare and find the sweet spot in between, but for now i just need the first (unless a high V low I version would be easier to achieve).
Ive been stuck here for a long frustrating amount of time; if anyone can tell me whether this is achievable as DIY, or if there's purchasable items im unaware of inexpensively that do this, any vids or further info somewhere to point me to...Id very much appreceiate a comment responce with a how to or any of the above to help me finalize this build. Thanks for your time to read all this and hopefully someone better in this particular field can help. Good day all
I use a lm3886 audio module from TI. Delivers a few amps, almost no distortion. Also cheap.
The OPA541 has a much better Gain/BW Product of 1.6MHz ±40V 5-10A and the LM675 even 5.5MHz ±30V 3A , cheers Konstantin
PLEASE HELP, ANYONE READING!! Read fully for the full scope of situation please....
Could you just use a lower current version that is capable of the higher frequencies (dont know shat thatd be, but it seems some exist they just cant drive larger currents), then feed this signal in as the control to a second stage driving some type of further amplification through a bank of power MOSFETS or similar components to push more current into the signal?? Similar to how a high watt sub audio amp can push huge corrents?
Probably not MOSFETs specifically i dunno, im not on this level of full understanding yet...but im so close!! Lol...but whatever component needed use several in 'parallel'** (? I think) to add current from each in a bank that could drive very large currents, as you see 4 or 8 in a row on a 1-2kW car amp. Is the problem in the limitations of high power transistors not being able to switch fast enogh at such frequencies?
Reason: ive a genius idea for much higher yield/efficiency for H2 generator via electrolysis (Im a MS chem. engr, so I know moderate electronics but the whole picture has yet to "click" for me when combining these subsets of components into larger networks how it all works together etc). This is usually low V DC with large currents, however h2 gen. is proportional to how much current is used as it supplies the e- for the redox rxn. I through experiments on small scale have all but shown myself my thought of generating *extra H2 gas without requiring more current is possible by inducing *mechanical bond breaking, inducing free radical reactions which gen H2/O2 without more power input (the current draw actually reduces in most runs).
This is achieved by taking advantage of waters polar properties and the strong E-field between two close electrodes. The water will lign up in the field as magnets would in a B field...but this does nothing to break bonds. However, if a high freq. signal is used that is a harmonic of water's bond vibrations, the pulsing field intensifies this to the point they can cleave non ionically as a free radical, which will rearrange into H2/O2 (same happens at - terminal when O takes an e- and thus releases the H. radicals which then form H2 and two OH- etc) but unlike the electrode redox rxns, this does not consume power by using electron transferring mechanisms...Long story to try to explain but my ultimate point is:
I need to build an "amp" if you will, that can drive this electrolysis cell with low voltages but be able to deliver larger currents with a semi-adjustable frequency control to fine tune in the resonant frequency. Most importantly though its an AC like signal, but I need the final output to the electrodes to be *DC offset...as in rather than a forward-backward oscillating current i need a high max to zero oscillation with a DC behavior as in current only flows one direction and the electrodes polarity does not change. This is crucial to keep molecules oriented in same direction to feel the "vibration" rather than spinning 180 degrees everytime the signal reverses (this would only heat the solution not create free radical degredation). Ive seen a significant sudden increase in gas gen. on small tests, but i need to scale up. Is this type signal doable as DIY??? Ive a tiny budget, and came a long way in progress to be stuck at the very end lacking knowledge to build such a circuit.
Just out of curiosity what are some typical applications of the original HP box? TNX for sharing!
From Kepco:
motor testing, testing of magnetic components (coils, speakers, etc.), industrial applications with inductive loads, driving CRT coils, cryogenic applications and powering correcting magnets for medical imaging applications or particle accelerators
solar cell/panel testing, driving and testing piezo-electric devices, capacitor testing, driving and testing capacitive transducers, and power for industrial or lab applications with capacitive or capacitive-resistive loads
Famous last words: I got it on EBay for half off. . .
how about "I paid full price but it still doesn't work"
@@IMSAIGuy I must have been needing sleep when I watched this video. I could have sworn you said you picked it up for $8 or $18 on eBay.
In any case, the statement is generally true. :)
The design engineer from manufacturing answer about devices problems reminds me of the old cartoon poster of the evolution of a product. If it fits an works good for us, if it doesn't, your on your own. Thanks for the look. Hope to see your stages of build an applications.