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  1. CDRIVE

    Will MS Ever Get Things Right?

    Interestingly, most of the threads I've read about this issue seems to be related to SP1. Though SP1 was already installed when this happened to me. People have reported that uninstalling SP1 cured the problem but when they downloaded and installed another copy the same thing happened. I...
  2. CDRIVE

    Schematic For EL12 Turn Signal Flasher

    Now that I thought about it a bit more I'm fairly certain that there was a resistor in there too. This is what I think is in there because it simulates well. The actual wiring of the turn signal circuit is simplified here, as I don't show the brake switch override / interconnect. Tina also needs...
  3. CDRIVE

    Schematic For EL12 Turn Signal Flasher

    I just replaced the flasher module on my wife's 1989 Jeep wrangler. Yes, it's been in there since 1989 and 226000 miles. Auto Zone's replacement was an EL12, which is transparent. I could see that it was not a bimetal thermal element but rather electromagnetic, which included a 1600uF timing...
  4. CDRIVE

    Will MS Ever Get Things Right?

    When I discovered that my W7 Home Premium had "Remote Assistance" enabled I un-checked it. When I returned to the control panel to verify the change I discovered that the 3 "Remote Desktop" options on the same panel vanished! I re-enabled Remote Assistance but no go. Like every windows issue...
  5. CDRIVE

    The Ultimate Transistor Amplifier

    Hi Roger. When I first read this I thought you were misinterpreting or misstating this spec. I started typing up a reply but I've deleted all of that because I don't want my statements to be wrong. I'm going to mull this over a bit before I commit to an opinion. Heck, you may be correct and I'm...
  6. CDRIVE

    The Ultimate Transistor Amplifier

    Roger, I don't understand some of your unit values, or rather the terms that you use. When you refer to the transformer use the terms that we'll all understand like "pri" & "sec" as in Lpri=.2H, Lsec=.3H. This tells me the primary is .2H and the secondary is .3H. If I read Npri=100 and Nsec=200...
  7. CDRIVE

    The Ultimate Transistor Amplifier

    What in that statement implies that I'd find joy in doing that? I just finished doing 3 days of donuts around my neighborhood. Why you ask? Because I ordered a bike maintenance fixture that was shipped via FedX, who will not leave an unattended package. The tracking link was useless, as it...
  8. CDRIVE

    The Ultimate Transistor Amplifier

    Roger, I hope my words were not interpreted as criticism. They're not intended to be discouraging in any manner. I'm a bit fascinated with adapting tube design to JFETs too! ;) At this point in my life I'm not physically building circuits but I do like spicing stuff. Spice can be very accurate...
  9. CDRIVE

    The Ultimate Transistor Amplifier

    I needed to refresh my memory so I did a quick spice to verify it. JFETs are ambidextrous devices. IE, the Source and Drain are interchangeable. This puts the schematic symbol your using for JFETs in question. The only arrow that should be present is in the Gate node. ;) Chris Edit: The...
  10. CDRIVE

    The Ultimate Transistor Amplifier

    Not being an audiophile I'll reserve judgment on this. An ideal transformer can be defined simply as its turns ratio, where; Voltage Transfer Ratio (N)= Vsec/Vpri. It follows that impedance and current follow the same convention. It also follows that P remains as a constant. This all looks...
  11. CDRIVE

    PC Heat Alarm Circuit Help

    Define Breadboard. Is this constructed on a protoboard (plug & play), stripboard, perfboard, other? Chris
  12. CDRIVE

    PC Heat Alarm Circuit Help

    Actually IC3 & IC4 are both multivibrators. IC4 generates the audio tone that drives the speaker. While IC3 gates IC4 on and off to create a beeping sequence instead of a steady tone. Chris
  13. CDRIVE

    The Ultimate Transistor Amplifier

    This is an interesting read about power JFET's. http://www.6moons.com/industryfeatures/zen8/zen8.html Chris Edit: Links to this were not readily apparent, so I thought I'd add this. http://www.nextag.com/Power-Jfet/products-html?nxtg=2d850a3c0505-1099E80214E9E398
  14. CDRIVE

    The Ultimate Transistor Amplifier

    I remember the Dumont had only single trace, AC input and no trigger controls what so ever. There was only a Sync pot. Locking the signal was near impossible. Interesting that you mention depletion mode power MOSFETs. My Tina spice library only provides a generic model that has no...
  15. CDRIVE

    The Ultimate Transistor Amplifier

    Fish, I don't have digital scope. My current scope inventory includes ..Fairchild 767H, HP 1741A and a Tektronix 221A. ;) Over the last year or so I gave away two cart mounted vintage Tektronix models but I don't remember the models. Somewhere buried in my junk is an 80's vintage Leader with a...
  16. CDRIVE

    The Ultimate Transistor Amplifier

    Hey, are you still there? You didn't answer this. Also, what is your THD goal? Chris
  17. CDRIVE

    Are The Enviromental Wackos Responsible For This?

    Not exactly the movies but MacGyver had to be the ultimate in technobabble. While multitasking on this PC I had an episode up on the TV screen. MacGyver and teen super geek were triangulating a transmitter with some lame repurposing of his Jeep radio. The most hysterical scene was when the...
  18. CDRIVE

    Voltage regulator problem

    Talk about putting the cart before the horse! It isn't done that way. Below you will find the typical / basic steps (SOP) for circuit design and implementation. (1) Operational Concepts are discussed and agreed upon with design engineer. (2) Engineer designs and draws schematic based on (1)...
  19. CDRIVE

    Are The Enviromental Wackos Responsible For This?

    Yeah, I know that scene! It's at the beginning of the flick. Actually, I'd like a handlebar mounted weapon that could do that! :D Chris
  20. CDRIVE

    Ever wonder why Windows has more problems than Mac?

    Yup, I shouldn't have responded to that at all! Chris
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