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    Weller solder guns

    What's the difference between the black and red Weller solder guns? Is the change when Cooper took them over, or is one a hobbyist and one a commercial range?
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    Frustrating Super Champ X2 problem

    When does a cracked capacitor solder joint in a low voltage supply cause an amp to be completely silent? When it's a Super Champ X2 and the capacitor is the 4700uf smoothing cap in the 3.3v supply....
  3. Agreed, that's a lot of voltage drop for a GZ34....

    Agreed, that's a lot of voltage drop for a GZ34. Modern production tubes do have a larger voltage drop than older ones, though, but not as much as you're getting.
  4. I suppose they could have made control that cuts...

    I suppose they could have made control that cuts bass effectively as well as treble in the other direction, low-loss and with a centre off detent. Similar construction with a tandem pot, but with one...
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    Doug Wilkes patented a sliding rail pickup system...

    Doug Wilkes patented a sliding rail pickup system in the early 80s. Dave Gilmour has recently sold his Wilkes 'The Answer' that has this feature.
  6. How many amps have a fused screen supply? I can't...

    How many amps have a fused screen supply? I can't recall one right now. Fusing the entire tube set off one fuse gives a problem in identifying if a single tube blew the fuse. If so, which one? I...
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    So, is the Pace the one to have - better than say...

    So, is the Pace the one to have - better than say a Metcal or other premium brand?
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    I didn't wire my HPF input filter directly to the...

    I didn't wire my HPF input filter directly to the tray, but on the input to the drive circuit, so avoiding resonance on the input. This is perhaps similar to what überfuzz mentions.
    Constant current...
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    I experimented with input filtering but did it...

    I experimented with input filtering but did it with a rotary switch and fixed-value caps. I did this because my original build had too much low-end. I really liked the sound but couldn't tame the...
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    It's the one with plastic pickups and a...

    It's the one with plastic pickups and a pickguard. She does want a regular single-coil Tele sound out of it though, so changing it to another humbucker equipped guitar isn't what she wants. It would...
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    I checked and there;s no dummy coil fitted and...

    I checked and there;s no dummy coil fitted and the PCB is a single preamp with the pickups switched in front of it. The missing components are as you suggest, the dummy coil circuitry, plus a few...
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    The preamp isn't potted and it looks to be made...

    The preamp isn't potted and it looks to be made to fit a number of models, as there is about 1/3 of the PCB that's silk screened but unpopulated. I found a schematic for the Strat version but there...
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    I also think it would be a big mistake to change...

    I also think it would be a big mistake to change it. She wants to use it though and not to sell it, but doesn't like how it sounds. I played it this morning and it sounds so unusual and different...
  14. Sometimes a Torx bit of a slightly larger size...

    Sometimes a Torx bit of a slightly larger size can be carefully ground with a slight taper and the 'flutes' sharpened a little more with a Dremel cutting disk. This can be tapped into the hex recess...
  15. Castings cool from the outside and this increases...

    Castings cool from the outside and this increases the effective surface tension and the bubbles get pushed to the inside of the skin that first forms. That's why voids often only show up when...
  16. FWIW, my own dwell control really spanks the tray...

    FWIW, my own dwell control really spanks the tray from about 1/3 up. I could change the pot taper, change the pot and put and additional series resistor in but I sometimes like to turn it way up. The...
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    That's the EEV branded version. Here in the UK...

    That's the EEV branded version. Here in the UK that's £117 but the regular version is £75. I also saw it about 2 years ago in a $50 review. The only difference is the branding and blue holster. I...
  18. It sure does. When my wife's out I put on her...

    It sure does. When my wife's out I put on her makeup and panties and pretend to be Nancy Wilson fixing up her guitar before a gig.
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    The link is really useful - thanks for that. Much...

    The link is really useful - thanks for that. Much appreciated.
  20. You could simplify it by not having an emulated...

    You could simplify it by not having an emulated line out or selectable loop level. The speaker sockets tie into the amp standby circuit, but if you wanted you could wire it to operate like any other...
  21. There used to be a fibre, plug-shaped cleaner you...

    There used to be a fibre, plug-shaped cleaner you moistened with an enclosed bottle of what may have been isopropyl alcohol. They came in regular 1/4" sizes, 1/8", as well as Bantam (GPO/B) sizes. I...
  22. If it is a used PCB be aware that many of the...

    If it is a used PCB be aware that many of the earlier amps suffer from a breakdown in the PCB substrate around the phase inverter MOSFETS (usually these are IRF830) At the same time this overheats...
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    She's after single coils more along the lines of...

    She's after single coils more along the lines of a regular Tele. I wondered if a standard Tele pickup may fit under the covers (if they can be removed - they could be potted). I don't yet have the...
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    Early 80s Telecaster Elite pickups

    Is anyone making replacement pickups as a direct replacement for those in the original 80s Telecaster Elite? My customer wants to ditch the pickups and active electronics in favour of a more...
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    Also, earlier amps had 330R resistors which were...

    Also, earlier amps had 330R resistors which were later replaced with 470R to give the zeners an easier time. I usually replace the resistors if they're 330R and form the leads of a pair of new zeners...
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    I like Brymen multimeters, though the price in...

    I like Brymen multimeters, though the price in the UK is higher than I see in some countries. They're Taiwanese, have excellent internal protection and look to be much better quality than most. Many...
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    I really like auto-ranging meters and my...

    I really like auto-ranging meters and my most-used Fluke auto-switches to volts if on the resistance range and a voltage is detected. You can operate it in manual or range-hold mode but it's so...
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    If the amp clips then the AC voltage measurements...

    If the amp clips then the AC voltage measurements would be very difficult for a manufacturer to specify. The easier and more consistent way to do this is to ensure that the test voltages are easily...
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