Need help planning non-HRM build

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Structo
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Re: Need help planning non-HRM build

Post by Structo »

The 10M resistor is a ground pad which I believe is to prevent popping.

This layout is from the D'Lite Tweeked layout.
I have both V1 and V2 with high plate loads. 220K/150K

Yes it thins the woofiness of the bass a bit.
Tom

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markusw
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Re: Need help planning non-HRM build

Post by markusw »

Tonegeek wrote: O yea! This is where I yearn to go. I remember reading about that mod. I did a similar OD entrance mod on my BM that cuts the bass and also boosts the signal (hint- i put a ...) what the hell, here it is: the HRM uses 470k usually paralleled by 47p. I made another network that uses a 180k in series with a .0047 cap. You switch this thing across the 470k for a boost and more focus. I use it to get instant Hendrix/SRV tones. It brings out the Strat position 4 and 5 very nicely. Kind of a fat 18 watt Marshall sound to me. I posted clips of this on this thread (The hendrix one mainly): https://tubeamparchive.com/viewtopic.php?t=9355
I just noticed on the description that comes up when that clip is playing that it says Strat bridge. wrong, it is position 4. The 'focus' is the network i mentioned. Mid boost is on too, but even without it, it gets that sound, just a bit less in your face mids. (I use tamed mid boost of 500p) my unboosted treble cap value is the old Fender mainstay of 250p.
Structo wrote:OD entrance mod
Looks like the .05uF might tighten up the bass slightly. Why do you need the 10 meg resistor (relay pop maybe)? What plate resistor value do you use on V1?
Thanks a lot for sharing your BM mod! 8) Sounds great indeed :D

The 4M7 in parallel to the 6n (in my case) also prevents popping. Doesn't matter whether you make it in parallel to the cap or to ground as in the layout Structo posted.
If you know how you can do the caclulations to see that it doesn't matter. I had to simulate it in Spice to find out :lol:
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Tonegeek
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Re: Need help planning non-HRM build

Post by Tonegeek »

markusw wrote: The 4M7 in parallel to the 6n (in my case) also prevents popping. Doesn't matter whether you make it in parallel to the cap or to ground as in the layout Structo posted.
If you know how you can do the caclulations to see that it doesn't matter. I had to simulate it in Spice to find out :lol:
Thats sort of an electronics palindrome :lol:
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