Yes, I use 6k8 2W as the 3k can get a bit hot. They are simply bleed off resistors.
Here are several on Aliexpress:
DC DC Boost Converter Constant Module Current Mobile Power Supply 250W 10A LED Driver Module Non isolated Step Up Module-in Integrated Circuits from Electronic Components & Supplies on Aliexpress.com | Alibaba Group
DC DC Boost Converter Constant Module Current Mobile Power Supply 250W 10A LED Driver Step Up Module-in Replacement Parts from Consumer Electronics on Aliexpress.com | Alibaba Group
250W DC DC Boost Converter Adjustable 10A Step Up Constant Current Power Supply Module Led Driver For Arduino-in Voltage Regulators/Stabilizers from Home Improvement on Aliexpress.com | Alibaba Group
Basic transistor tester on DMM or use one of these:
12864 Mega328 ESR Transistor Resistor Diode Capacitor Mosfet Tester w/ Test hook | eBay
12864 Mega328 ESR Transistor Resistor Diode Capacitor Mosfet Tester w/ Test hook | eBay
Awesome, my DMMs don't seem to have that feature so I ordered one of those.
Thank you X!
Cheers,
~Gable
The nice thing with the automated tester on eBay is that it figures out the pins for you. Any orientation works. Whereas the DMM one requires you to put in proper ECB/CBE etc. for it to work. The eBay one also tells you if it is N or P channel mosfet or Jfet, plus the Vgs. Whether or not it has a built in diode.
Awesome, hopefully it arrives fairly quickly. I'm working on measuring and matching all the components I can. I know it's not required, per se, but I have plenty of extra of just about every component so I might as well try to get them tight to spec, and to each other (channel, etc.).
I am trying to figure a clean way to route the dual 24v from the external smps bricks into the case. Cannot use the standard 5.5mm barrel connector since cannot have shared ground pins on shell which would touch case ground. I think maybe Neutrick 3-pin PowerCon with two flying leads to isolated 5.5mm barrel jacks. Or install two 5.5mm barrel jacks onto a small piece of FRP (no copper) and mount that where IEC jack used to go.
Vunce, you and Pcgab are my two stars chomping at the bit to start building. I will put your boards in the mail first since you guys are so enthusiastic. I will try to fill the rest of the orders by mid week or Friday the latest. Stuffing boards into envelopes and printing labels is the least fun parts of sponsoring a GB. It usually takes me like 4 hours for a typical GB like this one.
What about putting the SMPS bricks in a small enclosure all to themselves? Direct wire the ac input to an IEC connector on one end and wire the outputs in series to a Neutrik Powercon connector on the other end and make an umbilical cord for connecting the SMPS case to the amplifier case.
Having two bricks on the floor is a bit annoying, I think I’d rather have a single case solution.
Having two bricks on the floor is a bit annoying, I think I’d rather have a single case solution.
Vunce,
Your solution is elegant and would allow use of an open frame SMPS like a pair of Meanwells. I like the fact my bricks are separate so that I can disconnect and use them
in my other amps (like MoFo). I suppose I could buy another set of 5amp 24b smps - in open frame. The key requirement is that output GND is isolated from Earth GND. This is needed to make dual rail supply by series connection.
Your solution is elegant and would allow use of an open frame SMPS like a pair of Meanwells. I like the fact my bricks are separate so that I can disconnect and use them
in my other amps (like MoFo). I suppose I could buy another set of 5amp 24b smps - in open frame. The key requirement is that output GND is isolated from Earth GND. This is needed to make dual rail supply by series connection.
in/out of negative voltage is connected, the board only changes the + voltage so if you use one high voltage board as in below link you will end up having the + voltage boosted and negative untouched so you will have 12-0-12 boosted to 24-0-12 if you use one board to boost +/-.
in my experience is best to have two SMPS to two boost boards and connect - rail to other + rail to have your 0 rail after boost.
AMAZON - WINGONEER 600W DC 10-60V To 12-80V Step-up Module
i m using this :
AMAZON - Panel Metal Aviation Wire Connector
