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PostPosted: Thu Feb 06, 2020 6:24 pm 
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Holy Ghost
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Go here for more fun!!

https://www.guitarscience.net/tsc/info.htm

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PostPosted: Fri Feb 07, 2020 12:48 pm 
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Thanks for that link, that's a great resource. I never realized that so many classic amp circuits have such a midrange dip by default.

That graph also goes against what I was suggesting above, that the Hiwatt bass may be perceived to be weaker... when in fact, it looks like by default the Hiwatt circuit is a little light on bass.

Thanks again, this will keep me entertained for a while...


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PostPosted: Sun May 17, 2020 11:32 am 
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coco wrote:
For more bass in OD mode, you could try a 47n cap off pin 6, instead of 22n, or put another 22n in parallel with the existing one & see if you like it.


I assume the 22n your are referring to is C4 in the schematic, i.e. the coupling cap from the overdrive stage.

Could you also increase C5, which is the cathode bypass cap for the overdrive triode? The schematic shows 2uF (though I was reading through old posts in this forum, and it looks like that was originally 1uF). How would increasing that compare to increasing the coupling cap?

Also: could the "Tweaker's Notes" mentioned on the schematic (and also builder's guide) be applied to the overdrive stage? I'm just thinking, if you're not concerned with the "purity" of keeping that overdrive stage true to real Hiwatt design, you could have some fun with it, maybe turn that stage into something with a fairly different voicing?


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