## Pages

## Welcome - Please Read

Welcome. I wanted to provide stripboard layouts I've made to help people new to electronics and even the more experienced get into different aspects of electronics.

I verify the layouts before I post them.

My Facebook Group: www.facebook.com/StripboardLayouts - Please Add For Updates!

My Twitter Thing: @InSonicBloom

I verify the layouts before I post them.

My Facebook Group: www.facebook.com/StripboardLayouts - Please Add For Updates!

My Twitter Thing: @InSonicBloom

## Saturday, 2 February 2013

### Amplifier Speaker Load Box 16 ohm For Direct Recording

I wanted to use my Bugera 6262 cranked up a bit so I thought I need to design a quick load box so I can unplug the speakers and put the line out into my recording interface and use software based cabinets.

There isn't a layout per se but I've provided a schematic and pictures - it is a very simple design so you should be able to follow it easily enough.

you will also notice that it uses 2 100watt 33 ohm resistors in parallel which will allow you to use amps upto 100watts or in my case (130watt) an amp not turned all the way up

you need twice the power rating on the resistors as indicated on your amp - ie if your amp is 50 watts you need 100watt resistors.

Subscribe to:
Post Comments (Atom)

Thanks for this Paul!

ReplyDeleteWould it be possible to mod this to be variable for use as an attenuator?

it's possible yes but you'd need some heavy resistors and you wouldn't be able to go lower than about an order of magnitude higher than 16Ω

DeleteEG the 22K resistor would have to be at least 1k so it wouldn't affect the load resistors

So the 22k can go down no lower than 1K (1 watt or higher?), and reducing it's value will give a hotter signal at the output?

DeleteThanks for the info !

ReplyDeleteOne question, for 8 Ohms output impedance I'll use 2 16 Ohm resistors. Anything else ?

Thanks

yes, that will work fine

DeleteThanks !

DeleteI forgot, I need to change the 22K resistor for a 11K to get the correct 8K resistence (according to my quick calculations)

DeleteI mean 8 Ohms resistance

Deletetry not to get hung up on calculations - when a resistor is a couple of orders of magnitude higher than others it is in parallel with then it won't affect the lower resistance. I know calculations are spitting out one number but if you measured it with your DMM you'll just get the lowest figure (in this case 8ohm) with maybe a tiny bit of deviation at the most

DeleteYep, you are right, thanks :)

Deleteno worries. it's easy to go overboard with the calculations in a hobby like this and I just urge that after anyone does calculations (and you should when necessary)but always check with a meter because sometimes real world doesn't quite match

Delete