Friend of mine just asked me about it - doesn't look like there's much inside! It looks like if we could get hold of the parts it wouldn't be really hard to make. It looks like the key parts are giant wire-wound resistors? If anyone knows what they are and where to get them I would love to know too!
Anyone know much about the Dr Z Brakelite?
- Thread starter HamishR
- Start date
vigilante398
Authorized Vendor
It's basically a selectable dummy load with 50W resistors. The top one in this picture says 3.5Ω, but the one on the bottom is a "multi-tap" resistor, so depending on which lugs you measure between it will have a different resistance. If anyone had access to one they could measure it would be trivial to copy.
Here’s an article about a diy version, just used regular power resistors and rotary switch between to get different levels. His schem is hard to read. Seems like you need to think about the power requirements and total impedance seen by amp for each setting.
It seems to be the same concept as the 1/4 and 10% power mod on rob robinette’s 5e3 mods page.
Misc > Air Brake Attenuator : DIY Fever – Building my own guitars, amps and pedals
[DIY Fever] Air Brake Attenuator - scaled-down version of the well known attenuator
diy-fever.com
It seems to be the same concept as the 1/4 and 10% power mod on rob robinette’s 5e3 mods page.
Here's the top one:
Ohmite, 25Ω 50W Wire Wound Chassis Mount Resistor L50J25RE ±5% | RS
I believe this is the Bottom one :
DR Z User Manual
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vigilante398
Authorized Vendor
I'm trying to redraw his schematic in a way that's actually readable, and I've regretfully had an aneurism and died.
I'll redraw a second draft and post it in a second.
vigilante398
Authorized Vendor
Did I help, or did I make it way worse? I don't have my main CAD computer today, so this is the best I can do right now.
D50xxxx 210 Series
L50xxxx 270 Series : https://www.ohmite.com/mounting-hardware/
I believe Mouser also stocks the extra clamps & clips also!
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