DIY Airbrake...

[Aharon]

Maybe somebody can email it to me too......(thanks)
mlhewittAThotmailDOTcom
Would really appreciate it ...thanks
Aharon

[bnwitt]

I sent the layout to nickt and asked him to send it to everyone else asking for it. Did any of you get it from him?

[nickt]

I sent the layout to nickt and asked him to send it to everyone else asking for it. Did any of you get it from him?

Now be nice" - he's the first to request since I received it and I only just saw the message!

[nickt]

Maybe somebody can email it to me too......(thanks)
mlhewittAThotmailDOTcom
Would really appreciate it ...thanks
Aharon

Sent as a PM...

[nickt]

Looks to me like you could save a lot of cash by removing features from the Airbrake and hardwiring what you need.

For me that's easy:
a. no attenuator or
b. pretty quiet

The brake itself reduces to three resistors and one cap
a. 25R 100W across signal to ground
b. 25R 100W in series with the signal
c. 0-150R 50W in parallel with an 0.1uF 400V cap

So...

** beware ASCII art follows **



IN ------|25R(b)|--------|0-150R(c)|-------- OUT
|
|
25R(a)
|
|
GND-------------------------------------------- GND

If you don't want to run a Marshall 100W into it you could probably get away with paralleling 4x100R 10W's to get the 25R's and do the same with whatever value you choose for the last resistor.

Anyway as a registered cheapskate I'm going to try this out and report back.

[Aharon]

Maybe somebody can email it to me too......(thanks)
mlhewittAThotmailDOTcom
Would really appreciate it ...thanks
Aharon

Sent as a PM...

Thank you nickt!
Aharon

[Aharon]

Looks to me like you could save a lot of cash by removing features from the Airbrake and hardwiring what you need.

For me that's easy:
a. no attenuator or
b. pretty quiet

The brake itself reduces to three resistors and one cap
a. 25R 100W across signal to ground
b. 25R 100W in series with the signal
c. 0-150R 50W in parallel with an 0.1uF 400V cap

So...

** beware ASCII art follows **



IN ------|25R(b)|--------|0-150R(c)|-------- OUT
|
|
25R(a)
|
|
GND-------------------------------------------- GND

If you don't want to run a Marshall 100W into it you could probably get away with paralleling 4x100R 10W's to get the 25R's and do the same with whatever value you choose for the last resistor.

Anyway as a registered cheapskate I'm going to try this out and report back.

Couldn't you do the same for the variable ?........put resistrors in series and tap at each connection?........for example three 5 ohms in series and a 10 ohm to complete the 25R?

Aharon

[nickt]

Couldn't you do the same for the variable ?........put resistrors in series and tap at each connection?........for example three 5 ohms in series and a 10 ohm to complete the 25R?

Aharon

Yes of course - my view is that I only need two settings - no attenuation or quiet. This way the circuit is very simple and for a smallish amp (an AC30 and a deluxe clone in my case ) the power handling can be much lower.

Maybe it will work maybe not - only one way to find out

[bnwitt]

Now be nice" - he's the first to request since I received it and I only just saw the message!

Wow, thin skinned. I am being nice, I did the layout and gave it away
thanks for passing it on Nick. I'm working 7 days a week at my day job until November and just don't have the time to send files very often. That's why I passed the baton to you.

[nickt]

I'd suggest the simple solution is for those who get the layout to pass it on to others who request with an acknowledge message in this thread - cruel but fair?

Having said that I'm happy to pass it on to who ever's not seen it but if I don't respond quickly it's because I haven't seen the request because, strangely, I also have a busy life.

BTW "Be nice"? - think Austin Powers - just a joke.

[bnwitt]

Nick, I did appreciate your sense of humor. Anyone who's avatar is a dog with music coming out of his butt definitely has one. I'm getting a little punchy doing the 7 @ 12 hour days. I think each guy who asks for the layout and gets it should watch the thread for the next requester. So, when you get it, your obligation is to pass it on once to the next guy. Then it's his turn. When you receive it, say thanks in a post and I've got the next one. That ought to work.

[Munga]

I try to send out the layout sometimes when I can. I think people should edit their posts once they receive it, to avoid confusion.

[bnwitt]

I try to send out the layout sometimes when I can. I think people should edit their posts once they receive it, to avoid confusion.

that would be helpful too

[nickt]

Nick, I did appreciate your sense of humor. Anyone who's avatar is a dog with music coming out of his butt definitely has one. I'm getting a little punchy doing the 7 @ 12 hour days.

Heh heh no problems - I know the feeling - BTW I really like your Avatar. Mine's pinched I'm waiting for a takedown order as it's almost a trademark

Back to business. I bought the bits for my Cheapskate's Airbrake and am half way through putting it together.

Found an interesting KF article about the Airbrake on blueguitar.org. Here it is if anyone's interested.

[Munga]

Thanks for that article. Its an interesting read.