The Amp Garage

I've used both AC and DC heaters and for my tastes the DC heaters seem to change the tone in a way I don't care for. Call it slightly muted, less lively, i.e. some slight but perceptible treble cut. I've hear some say they can't hear a difference but I can... Maybe it doesn't make much difference i...

The only issue is added complexity. As long as the max heater to cathode voltage is observed there are no reliability issues with heater elevation, so that is always a safe option. And usually it's good enough, and a safe option. DC heaters on the other hand involves a few potential issues. Simply r...

That's also definitely a benefit, the computer style radial caps are just way smaller than the more commonly used axial caps in amps. They work just as well, and cost less too. I'm looking to possibly start using more of them as well. The filter capacitors job is to just remove ripple, it doesn't m...

M Fowler wrote:Have you looked at Banggood? https://www.banggood.com/search/ac-to-a ... =123476181

Not until now. However they are all ac/dc converters, despite the page title...

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Yeah, I just can't seem to find anything...

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I need ac coming into the amp in order to use a transformer to get b+... I've only seen laptop bricks supplying dc...

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Hi, I'm building my daughter's first guitar (she's just turned three, so about time she get her own gear...), and the plan is to use a wall wart supplying 18-24Vac through a barrel connector and a dc regulator for heater chain and a 15/230 torroid for ht. Turns out I did a miscalculation on my heate...

Thanks!

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Where did you get that chassis? It looks a lot like one I bought years ago, intended to get more of, and forgot where I ordered from...
Nice looking build btw!

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Film resistors are made by putting a resistive film (metal or carbon based) onto a non-conductive tube. Then there is made a spiral cut, the number of turns deciding the length of the resistive film and thus resistance. Unless special care is taken with how the cuts are arranged there will always be...

Didn't mean to be snobbish, sorry if I came across that way! :-) I'll give a short reply, just so I won't contribute to more confusion... There are two relevant phenomena involved with resistor types: noise and distortion. Noise is covered well in online tutorials, but the important bit here is that...

Could find the edit: But KOC has indeed shared some nuggets for free, I have enjoyed some good suggestions over at music electrics forum, but he's not always correct in his technical advice, and don't seem willing to admit mistakes... (Also a lot of the advice seems to be "just buy these three books...

There is a definite reason why he wasn't added; he's much more controversial. I have a couple of his books, and they're good reads, but he's been associated with more "unproven mojo". He "invented" Power scaling, which was really just regular voltage scaling in a guitar amp. Clever idea, and he's do...

Doesn't seem to make much sense, signal and dc level isn't high enough to get resistor distortion (sweetness), and the other benefits of cc (overload characteristics and rf stability don't seem relevant in this stage either... The only effect of cc resistor resistors at the input grid would a tiny a...

There is, no denying it. And I don't see any conflict either in this case. Just saying Allen and RG are reliable even without having $30k amps to their name...

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