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  1. As soon as I read the title of the post, a...

    As soon as I read the title of the post, a buzzing ceramic cap across the rectifier diodes was the first thing that popped in my head. When I saw your photo, I was nearly positive that was the...
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    Nice work on the lead dress by the way. Looks good

    Nice work on the lead dress by the way. Looks good
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    Oh yeah, are those 100k resistors on the filter...

    Oh yeah, are those 100k resistors on the filter caps KOA Speer 5W Metal Oxide’s?
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    Necessary? Probably not. If it were me, and I...

    Necessary? Probably not.
    If it were me, and I were concerned with the proximity of the resistor to the leads around the socket, I might increase the distance between them another 1/4-1/2” and wire...
  5. I should mention that some needle nose are better...

    I should mention that some needle nose are better than others for this. If you’ve got a few different ones you’ll find which one works better.
  6. Ive tried a bunch of different techniques. But...

    Ive tried a bunch of different techniques. But the fastest and cleanest way is to straighten out the resistor lead and lay it flat against a hard flat surface like a block of hardwood or granite...
  7. Hopefully he still remembers

    Hopefully he still remembers
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    I will have to remember this technique next time...

    I will have to remember this technique next time I need to clean some jacks. I'd like to try this in some of my old tube sockets as well. Although the quality and price of Belton's tube sockets make...
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    Manufacturers usually (almost always) include...

    Manufacturers usually (almost always) include some sort of graphical info on temperature derating in the datasheet
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    Time for me to re-up on a couple of bottles,...

    Time for me to re-up on a couple of bottles, myself.

    ...so, I looked at the labeling on one of the bottles I have, and it lists a modest website, set up to buy via paypal:
    https://ampspray.com/...
  11. Bill Lawrence's Samarium Cobalt Noiseless design

    The strat my friend left me has a set of SmCo pickups installed, and I was looking a bit of technical information on the design and construction of these, and what (if anything) makes them unique. ...
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    From Rod Elliot Transformers - The Basics (Part...

    From Rod Elliot Transformers - The Basics (Part 2):

    "A transformer rated for 50Hz can be used anywhere in the world - it will work perfectly at 60Hz. However, the converse is not true. A...
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    Bob! your in luck. The best stuff I've ever used...

    Bob! your in luck. The best stuff I've ever used to clean tolex, chassis, faceplates, etc is using this conditioner my tech buddy developed called "Cranky's Amp Spray". Just so happens he lives in...
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    Patrick Turner of Turner Audio has an interesting...

    Patrick Turner of Turner Audio has an interesting article on "reforming" a Dynaco MKIV, where he drives the output stage in a similar way using a LTP with a CCS tail.Dynaco MKIV Reformed
    ....
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    If your planning to do this overseas in Europe or...

    If your planning to do this overseas in Europe or the UK, one really important point is to make sure that the transformer you want to use was designed to be used at both 50Hz & 60Hz!
    A transformer...
  16. Anyone experiment using other SiC Varistors? I've...

    Anyone experiment using other SiC Varistors? I've seen some lower voltage variants sold on ebay (supposedly USSR stock).
  17. Ha! I didn't notice the name at first.

    Ha! I didn't notice the name at first.
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    I wanted to correct some information here. I...

    I wanted to correct some information here. I emailed Heyboer to confirm what temperature class magnet wire they use and he responded that the temperature class 155C is Typically used. This is fairly...
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    Ah, in that case there is a great resource you...

    Ah, in that case there is a great resource you might be interested in. There’s a website based on the A book written called the ‘physics of the electric guitar‘ (or something like that). The text was...
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    So, there's the noise increase as resistance...

    So, there's the noise increase as resistance does. What's the capacitance of the piezo disk you're using?
    You can get really high input impedances, but there might be a point where it makes sense...
  21. No thats fair. Really, my example was more...

    No thats fair. Really, my example was more relevant to C26. But Im a bit of a compliance dink, and best practice is caps on or across main lines voltage should be safety rated class X.
  22. I dunno yet. Lemme think of something. ;)

    I dunno yet. Lemme think of something. ;)
  23. Also, make sure that the earth (green wire) goes...

    Also, make sure that the earth (green wire) goes to its own dedicated fastener, and is secured with a lock nut (or scrape any oxidization or paint away from the chassis, and solder it directly)....
  24. well, that depends. The most common cap I've seen...

    well, that depends. The most common cap I've seen in Vintage Ampeg mains circuitry is a total hazard, and should definitely be replaced with appropriate X-class capacitors. I've seen the originals...
  25. me too

    me too
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    Look at the speed of this op-amp Analog Devices...

    Look at the speed of this op-amp Analog Devices LTC6268. In that package, almost makes you want to design a differential probe project, doesn’t it nickb?
    .....what’s this? LTC6268_isoSPI_DiffAmp.asc
  27. It seems like the graphical plots on the Data...

    It seems like the graphical plots on the Data sheets would support this when you look a how the load line intersect with the dissipation curve
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    I would definitely go mainframe, if I came across...

    I would definitely go mainframe, if I came across a 7104 in great shape (at a great price). It would be cool to own the piece of gear that reached the analog/1GHz benchmark.
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