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  1. Replies
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    10G and 100G resistors were common where I...

    10G and 100G resistors were common where I worked. They were used as the feedback resistor of a mass spectrometer electrometer amplifier. They had to be mounted on ptfe standoffs and you couldn't...
  2. Yes, it's to be expected with that input signal...

    Yes, it's to be expected with that input signal level. The first gain stage is not overdriven but 12V pp is far too much for the input of the second stage to handle and it's cold bias causes it to...
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    518

    Yes, electric drill drivers are great for...

    Yes, electric drill drivers are great for building stud walls and putting up plasterboard where you have hundreds of screws to drive but I would never use an electric driver on electronics. A manual...
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    Had to Google that one. I've (fortunately) never...

    Had to Google that one. I've (fortunately) never come across it. It sounds disgusting.

    Clamato /kləˈmætoʊ/ is a commercial drink made of reconstituted tomato juice concentrate and sugar, which is...
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    I used to use these. Stack two together and you...

    I used to use these. Stack two together and you have a 10 point star. They can be bent up a little to clear the chassis or use a nut as a spacer.

    56642
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    Orange cross head screws are probably Pozidriv...

    Orange cross head screws are probably Pozidriv therefore a Pozidriv bit should be used not a Phillips. A Phillips bit will fit in a Pozidriv screw but slips out before it's fully tight.

    Phillips...
  7. It was my (over)reaction to the big headstock...

    It was my (over)reaction to the big headstock strat I used to have that I hated the look of.
  8. A Tele with a Strat neck. Mine is the opposite. ...

    A Tele with a Strat neck. Mine is the opposite.

    56612
  9. TTIUWP :)

    TTIUWP :)
  10. Replies
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    If the Chief is still having trouble here's a...

    If the Chief is still having trouble here's a link to download the extracted file (It takes a short while to connect)

    geek.exe
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    375

    It won't let me do that

    It won't let me do that
  12. Replies
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    Do you have "Hide extensions for known file...

    Do you have "Hide extensions for known file types" ticked in folder view options? That would show 'geek.exe' as 'geek' but it doesn't matter just double left click on 'geek' and it should run without...
  13. Thread: Dr Z redplating

    by Dave H
    Replies
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    1,509

    You just have to make sure you never stop playing...

    You just have to make sure you never stop playing ;)

    I've simulated it. You can see that the plate dissipation drops as the output power increases so it's OK to bias at 90 to 95% but not over 100%...
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    All the PT secondaries are fused. I'd check them...

    All the PT secondaries are fused. I'd check them all. The HT fuse is F2 on sheet 3
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    OK, It's a .exe file inside a zip archive. It...

    OK, It's a .exe file inside a zip archive. It will run inside the zip without extracting.

    Download the "ZIP (2.52MB)" file to your desktop (say) from the ink in my post above. Double click on the...
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    This would make it 190k 56538

    This would make it 190k

    56538
  17. Replies
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    Perhaps it's like this? 56535

    Perhaps it's like this?

    56535
  18. Replies
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    I use the free version of geek uninstaller - link...

    I use the free version of geek uninstaller - link
    It doesn't need installing just extract it and click on it.
    If Opera shows up in the list select it and do - "Action" then "Force removal"
    It...
  19. Replies
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    Same here, I haven't gigged for over 10 years and...

    Same here, I haven't gigged for over 10 years and haven't picked up a guitar in a month. When I do it sure ain't pretty :sad:
  20. I get this for a CF driving a 4k resistor (no...

    I get this for a CF driving a 4k resistor (no tonestack)

    56501
  21. That won't tell you the large signal performance....

    That won't tell you the large signal performance.

    I don't know how accurate this is (I'll have to check it with Spice) but the standing current in the CF is typically 1.8mA (Bassman) and that's...
  22. I get that error when I try to run it from inside...

    I get that error when I try to run it from inside a zip file without extracting. As long as the two files are in the same folder or on the desktop it should work OK.
  23. Was the dhTubes.inc file in the same directory as...

    Was the dhTubes.inc file in the same directory as the EL84pp.asc file when you clicked on it?
  24. Try this. Extract the attached .zip, double click...

    Try this. Extract the attached .zip, double click on the EL84.asc file and it should open LTSpice, click on the running man to start the sim. When the sim has finished click on the output (Load) say...
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    If you have 3 x 100R in series across 6.3V then...

    If you have 3 x 100R in series across 6.3V then each resistor sees 2.1V and the power is 2.1^2 /100 = 0.044W
  26. Replies
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    What soldering iron are you using? I have no...

    What soldering iron are you using?
    I have no trouble with unleaded on PCBs using a 50W Weller TCP and #7 tip (700F, 370C)
  27. Replies
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    1,017

    I don't have a pentode circuit drawn up. Here's...

    I don't have a pentode circuit drawn up. Here's the frequency response of a 12AX7 unity gain stage with 500k feedback and load resistors and a 500p cap. It's -3dB at 20Hz.

    56358
  28. Replies
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    That's what I thought at first but the capacitor...

    That's what I thought at first but the capacitor is inside the feedback loop so won't the lower corner frequency be reduced by the loop gain?
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