Not Quite As Simple CSA
Re: Not Quite As Simple CSA
Cascode JFET input
Moved the feedback cap after the input cap
2nd Order RC Bias Filter
Photodiode Pulser w/ adjustable current source (driven by an external microcontroller or signal generator)
9V Battery Holder
I recommend 1p and 47 Meg feedback.
Moved the feedback cap after the input cap
2nd Order RC Bias Filter
Photodiode Pulser w/ adjustable current source (driven by an external microcontroller or signal generator)
9V Battery Holder
I recommend 1p and 47 Meg feedback.
Re: Not Quite As Simple CSA
I'll sell the bare boards for $10 each and tested assemblies for $50 (without pulser) and $75 (with pulser).
Bare boards without the pulser circuit are $5 each
Bare boards without the pulser circuit are $5 each
- Richard Hull
- Moderator
- Posts: 15037
- Joined: Fri Jun 15, 2001 9:44 am
- Real name: Richard Hull
Re: Not Quite As Simple CSA
Joe, I PM'd you with my order.
Richard Hull
Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
Re: Not Quite As Simple CSA
Thanks.
I just acquired qty. 300 of original PN4416A parts. I'll be measuring and matching for the cascode stage.
Here is the final board -
I just acquired qty. 300 of original PN4416A parts. I'll be measuring and matching for the cascode stage.
Here is the final board -
Re: Not Quite As Simple CSA
Built the amplifier and pulse section today. Everything tested great!
The pulser can generate 0.1 to 2pc pulses and the amplifier portion is approximately 300 mV/pc. I also feed the pulser randomized triggers (Another board I designed and built) at an average 76kHz and saw no roll-off in amplifier performance.
I've also decided to offer the board and parts as a kit that you assemble yourself.
The pulser can generate 0.1 to 2pc pulses and the amplifier portion is approximately 300 mV/pc. I also feed the pulser randomized triggers (Another board I designed and built) at an average 76kHz and saw no roll-off in amplifier performance.
I've also decided to offer the board and parts as a kit that you assemble yourself.
- Richard Hull
- Moderator
- Posts: 15037
- Joined: Fri Jun 15, 2001 9:44 am
- Real name: Richard Hull
Re: Not Quite As Simple CSA
Great work and effort Joe. I can't wait to get the word on getting those boards I ordered. I have a project scheduled to use them.
Richard Hull
Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
Re: Not Quite As Simple CSA
Captured live neutrons with the fully completed board and a BF3 tube ... now I need to start producing the boards that people ordered.
-
- Posts: 329
- Joined: Tue Jul 20, 2010 4:08 pm
- Real name: Joe Ballantyne
- Location: Redmond, WA
Re: Not Quite As Simple CSA
The original schematic that was in the very first post of this thread 7133.JFET_CSA.gif appears to be gone.
Does someone have a copy, and can we get it reposted?
Thanks!
Joe.
Does someone have a copy, and can we get it reposted?
Thanks!
Joe.
-
- Posts: 1494
- Joined: Thu Jun 28, 2001 1:30 am
- Real name: Jon Rosenstiel
- Location: Southern California