It is real easy to jump onto the toner transfer "train".
-one cheap HP printer (I have a HP P1005 - 100$)
-glossy magazine pages
-cheap iron on highest heat setting.
As many IPS's as you can print/imagine.
I got it near perfect years ago .... (link) - http://www.diyaudio.com/forums/solid-state/169590-mongrel-supersym-ii-26.html#post2438681
Those were the first "badgers" , but with a modular scheme.
OS
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Terry, use the smallest square wave that you can. If too large, it will just jam the transistors on and off, and this never happens with music signals. A small square wave will give you the step response that is actually applicable to what you hear. This step response depends on compensation, transistor parasitics, loading and often rail impedance.
I actually have all the stuff to etch. Even a fancy tank with heater and aerator. My problem is that my laser jet is a Brother and just doesn't work for toner transfer. Been too cheap to buy an HP. I can have these small PCB's made for less than $5 each and Photo sensitive PCB's cost $8 per. Add to that the factory made boards are two sided with vias, soldermask and screenprint, it just doesn't make sense to me to etch. The drawback of course is that I need an expert like Jason to create Gerbers. Thank God for Jason!
Terry, what is the output voltage when testing with 100kHz square waves.
Testing at low output levels should give a fair analysis ?, without blowing much,
but I keep my finger on my zobel resistor, just in case.
I use a 5Vpk output level when testing square waves, Is this OK?
Regards
Edit, posted before I read above posts.
Testing at low output levels should give a fair analysis ?, without blowing much,
but I keep my finger on my zobel resistor, just in case
.I use a 5Vpk output level when testing square waves, Is this OK?
Regards
Edit, posted before I read above posts.
I'm quite the novice so I can only report what I see. With a volt meter hooked up to the output and watching the scope, the higher I go in frequency, the less voltage I see on the output to get the same approximate level on the scope. What 40vac looks like at 1K takes about 1.5vac at 100k. Square wave seem to reveal more but there is a cost if not very carefully used.
I'm quite a novice too, and took out one of the three pairs (2 transistors) in the amp I'm building.
I was chatting with a buddy while driving 100kHz sqaure wave into the amp, turning the level up into nearly clipping level.
So at the cost of a new MJL21194/MJL21193 and two fuses, not fun wasting money.
Regards
Terry i have a question for you.
What type of voltmeter used for these output A.C measurements?
Thimios.
O-stripper- Gentlmen Here's one for you, A little Leach, a little folded cascode and a little bit of me. An innovative mirror and a HawksFord VAS.
Tremendous PSSR and some serious distortion cancellation.
Add your favorite OPS VBE and...
Maybe Stripper should form the compensation to fit his EF-triple
Tremendous PSSR and some serious distortion cancellation.
Add your favorite OPS VBE and...
Maybe Stripper should form the compensation to fit his EF-triple
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I can't see the type.
Are these true rms?
Are these specific for A.C MEASURMENTS 100khZ
Cheap digital voltmeters measure only sinusoidal and up to 400 hz
For square wave you need "true rms" ,these comes up to 1khz (usual).
If you want to measure high frequencies you need more expensive voltmetres.
Are these true rms?
Are these specific for A.C MEASURMENTS 100khZ
Cheap digital voltmeters measure only sinusoidal and up to 400 hz
For square wave you need "true rms" ,these comes up to 1khz (usual).
If you want to measure high frequencies you need more expensive voltmetres.
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Thimios,
I think you are more than likely correct that these are not true rms ac meters. This is one reason that I have kept my B&K analog ac meter, though I need to rebuild it with new capacitors. I do have a digital ac meter that is supposed to be a true rms ac meter but not sure what frequency that they are good for?
I think you are more than likely correct that these are not true rms ac meters. This is one reason that I have kept my B&K analog ac meter, though I need to rebuild it with new capacitors. I do have a digital ac meter that is supposed to be a true rms ac meter but not sure what frequency that they are good for?
