Charge Sensitive
Amplifier for Photomultiplier PMT tube
works fine for audio cart based MCA in amateur DIY Gamma Ray Spectroscopy
easy to setup, not need any special adjustments
PMT Pre-Amplifier Unit: Improved and miniature charge sensitive
pre-amplifier for amateur gamma spectroscopy Pulse Height Analysis. The
amplifier can work with Positive or Negative PMT high voltage
configuration. Default preset is for Positive polarity HV. The
output of the amplifier is compatible with computer MIC input or Line input and
can be used with freeware like PRA, Theremino or BecqMonitor. You can adjust PMT pulse duration from ~50uS
up to ~250uS. For better spectroscopy results please use 24bit audio cart.
The board has excellent results with less than 9% FWHM on 24bit audio cart and
count rate of the tested samples less than 1000 cps. If your tested sample has
higher count rate you can increase the distance between the probe and the
sample. Adjust amplification factor by adjusting high voltage level on
tube.
Technical data:
Note: For correct wiring please use the included diagram.
Electrical circuit is not included.
Setup: Use included diagram to wire the module to PMT and power supply. Set
HV to the minimum and slowly rise HV on PMT tube, check amplifier pulses on SMA
output. Adjust HV to get acceptable amplification before signal from higher
energy gets into clipping. Adjust 1M potentiometer to set RC time of the pulse.
Usually audio card based MCA require 100uS duration for each pulse. If you do
not have oscilloscope you can do same adjustment with audio card software like
"Theremino Audio Examples".
To our valued customers, please read purchase terms
before you bid or buy!
We'll use the best shipping method availiable to your destination, however some areas and some countries now will take much longer to receive international mail. Please allow longer delivery time than usually and conact me prior buying if you want to change delivery method to DHL Express (recommended).
Packaging: The product dispatched
carefully packed into anti-static bag and sturdy carton box. We
use only high quality and new packaging materials.
Technical issues and support: If you purchase this item you are agree that you have skills and
tools to perform required DIY soldering (or de-soldering) and you know how to
connect additional external components or modules. All project components
should be installed and soldered in proper polarity with proper connectors. Any
hardware/software modifications are not covered with
warranty.
Please read carefully product
title, description and include list. Any questions are welcome. If you
received broken or defective parts please contact us first, because we can
resolve this problem in best way.
Handling time: 10 business days to
process international orders required after receiving cleared payment. This
does not include the number of business days the shipping service will take to
deliver the item to you. We can upload a tracking number during handing time
even before your package was transferred to logistic company for the delivery.
Shipping: We dispatch your order during 3-10 business day and will upload a
tracking number to eBay for USA buyers only. Take note, international shipping
is more complicated and longer than domestic, that's why when you buy
internationally it mean you are agree to wait for the package. For Economy
International Delivery default stated time is 3-5 weeks. Some countries may
take longer because of your country custom regulation rules or postal service.
USA usually takes 2-5 weeks; Europe 1-5 weeks; Australia 2-5 weeks; Germany 3-5
weeks; Israel 3-7 days; Russian Federation 4-6 weeks; All other countries 3-5
weeks default delivery time.
Tracking: If you not received your
package during 30 days please contact us first with "Details about
item" request and not with opening "non-receiving case"
directly. Take note, we ship through state export account and not from
post office branch. This is the reason why your package is trackable only after
it was sent abroad from Israel export and not at the date of collecting or at
the date we uploaded a tracking number. Online tracking system in Israel
displays information with big delays, post website provide tracking info for
reference only several days after your item was sent abroad! Please be
patient for the delivery and contact us if you have additional
questions about shipping.
Custom & Duty Fee: All international buyers are responsible to cover any possible custom
fee or import tax that maybe applied at his/her country. We are obligated by
export law of Israel to declare an order price as it was stated in your PayPal
bill. German buyers, please remember when you buy that in Germany import custom
rules require you to pay fee. We are not accept any claim because of your
country custom regulation rules / delays / fee! Please contact your local
custom office for more details about custom process and import tax.
You are responsible for any
VAT, tariff, duty, taxes, handling fees, brokerage charges, customs clearance
charges, etc. required by your country for importing consumer goods! There is
no way for RH Electronics (the shipper) to predict your country's
customs/fee habits, so be prepared to pay full VAT on the fully declared value
of your order as well as any customs fees your postal system may charge you! If
you do not pay the required brokerage fees, VAT, tariff, duty, taxes, handling
fees, customs clearance charges, etc - we cannot issue any refunds.
Our shipping system is
completely automated, and we cannot falsify customs forms. The customs forms
will describe the cost of your order and contents as “Education
DIY Kit for soldering”.We cannot mark orders as "gift" or lower the
values.
Returns: Accepted if you not
started to solder/use device. In original package, including all components.
You'll need to cover return shipping cost.
Payment: Paypal only for eBay purchases.
V.A.T.: If you live in Israel please take note, all buyers with
DELIVERY ADDRESS WITHIN ISRAEL HAVE TO PAY 17% VAT! Refusing to pay tax will
force us to cancel the order. If you live in Israel and want to purchase our
item on eBay please contact us first with "Shipping details" request
and we'll send you eBay offer with adjusted shipping price and VAT
included.