Search found 166 matches
- Tue Nov 03, 2020 6:46 am
- Forum: Neutrons, Radiation, and Detection (& FAQs)
- Topic: The rhodium leap - Ouch!
- Replies: 3
- Views: 359
Re: The rhodium leap - Ouch!
You only live once.
- Tue Oct 20, 2020 6:44 pm
- Forum: Neutrons, Radiation, and Detection (& FAQs)
- Topic: Not Quite As Simple CSA
- Replies: 66
- Views: 23104
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 -
- Tue Oct 20, 2020 12:52 am
- Forum: Neutrons, Radiation, and Detection (& FAQs)
- Topic: Not Quite As Simple CSA
- Replies: 66
- Views: 23104
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
- Tue Oct 20, 2020 12:41 am
- Forum: Neutrons, Radiation, and Detection (& FAQs)
- Topic: My preamp design
- Replies: 1
- Views: 461
Re: My preamp design
I'm using cascode JFETs as well. (Tennelec 175 B does this)
- Mon Oct 19, 2020 9:35 pm
- Forum: FAQs: Neutron - Radiation Detection
- Topic: FAQ - Roll your own preamp (Richard Hester design)
- Replies: 13
- Views: 1250
Re: FAQ - Roll your own preamp (Richard Hester design)
I updated my post in the Richard Hester thread.
- Mon Oct 19, 2020 9:20 pm
- Forum: FAQs: Neutron - Radiation Detection
- Topic: FAQ - Roll your own preamp (Richard Hester design)
- Replies: 13
- Views: 1250
Re: FAQ - Roll your own preamp (Richard Hester design)
Some thoughts: Before making my iteration I looked through all of Richard Hester's designs and made changes - - I think the anode connection of D6 is less than optimal since the feedback bandwidth is already pretty low and the performance degrades at higher count rates (I increased the bandwidth in ...
- Mon Oct 19, 2020 5:45 pm
- Forum: Files
- Topic: Photodiode Pulser Circuit
- Replies: 3
- Views: 5635
Re: Photodiode Pulser Circuit
Does anyone have this file?
- Mon Oct 19, 2020 5:24 am
- Forum: Neutrons, Radiation, and Detection (& FAQs)
- Topic: Not Quite As Simple CSA
- Replies: 66
- Views: 23104
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.
- Mon Oct 19, 2020 5:23 am
- Forum: FAQs: Neutron - Radiation Detection
- Topic: FAQ - Roll your own preamp (Richard Hester design)
- Replies: 13
- Views: 1250
Re: FAQ - Roll your own preamp (Richard Hester design)
I converted Richard Hester's design to a PCB with a few modifications (the main one being a high voltage bias connection with a 2nd order RC filter). I'm building a number of these boards late next week. I'm willing to sell completed and tested boards or just the bare boards. Is anyone interested? I...
- Wed Oct 07, 2020 3:26 am
- Forum: Neutrons, Radiation, and Detection (& FAQs)
- Topic: Ortec 487 Manual
- Replies: 0
- Views: 797
Ortec 487 Manual
Does anyone have a PDF of this manual (preferably with schematics)?