file c:\jon\89_97ITH

rename as c:\hagen\wpfiles\jonprojects

AO Projects 98 -

overspeed limiters

proposed hydraulic dampers for carriage houses

half-height 430 MHz turnstile

unpressurized collector for 430

half-height transitions for 430

wind monitor

new monoplexer driver

tiedown algorithm, lightning protection, meters

proposed low-power dummy load (for 430, low duty cycle)

drew all new schematics for 430 system

cal kit for 430MHz half-height waveguide

NAIC Ithaca projects 89-97

radar interface

resolver electonics

3 GHz LNA

ce,cb,cc noise measure paper

correlator ASIC chip

cable machine

430 OMT

backscatter gain

radio engineering course

Radio Frequency Electronics textbook

2380 rotary joint

430 sliding joint

student radio telescope

tie down control algorithm

coaxial transmission lines for hf trans lines

hf phase shifter

cable tension meas

standing waves

2380 horn shutter

rcvrs

s-band radar hemt rcvr

tert. actuator

reflector design

reflector backup structure design

compressors and shacks

__________________________________________

To: Don Campbell

From: Jon Hagen

Date: 11-3-89

Subject: Equipment Developed at NAIC, Ithaca

The following list contains major equipment designed and built in Ithaca and delivered to Arecibo since 1975. A few items represent test equipment and/or studies done in Ithaca to support equipment development.

Line Feeds:

318 MHz single-polarization feed

606 MHz single-polarization feed

18-cm dual-polarization feed

21-cm dual-polarization feed

22-cm dual-polarization feed

6-cm single-polarization feed

2380 MHz single-polarization feed with rotating mount

2380 MHz dual-polarization feed

Improved 2380 MHz dual-polarization feed

2270 MHz dual-polarization feed

Approx. 8 other miscellaneous single-polarization line feeds

Mini-Gregorian Dual Mirror system, space frame, and associated feeds:

4-8 GHz flare angle controlled corrugated horn

8-16 GHz flare angle controlled corrugated horn

3.15 GHz aperture controlled corrugated horn

Cryogenic Receiver Systems:

Single-channel L-band GaAs FET receiver

Dual-channel L-band GaAs FET receiver

Dual-channel 18/22-cm GaAs FET receiver

Dual-channel 2270-MHz GaAs FET receive

(later converted to 18/22-cm)

Rebuild three early JPL single-channel S-band masers

Dual-channel 6-cm GaAs FET receiver

Dual-channel 430 MHz GaASFET receiver

Two Dual-channel 2380 MHz maser receivers

Universal 70-degree single-channel receiver package

Dual-channel 6-cm receiver for the Mini-Gregorian system

Dual-channel 3.15 GHz receiver for Mini-Gregorian system

Two universal liquid nitrogen receiver dewars

Cryogenic Refrigerator Systems:

Rebuild three JPL maser refrigerators

Numerous other rebuilds and overhauls of helium refrigerators

Helium Compressors:

Rebuilt five CTI model 210 compressors

Built six 3-HP compressors

Built four 5-HP compressors

Built one rotary compressors

Other Equipment:

611 MHz eleven-channel feed/receiver system

14-antenna 430 MHz receiving system for bistatic radar experiment

Two noise-adding radiometers

Four Baseband mixers for the 1008-channel autocorrelator

1420 MHz total power receiver

64-channel filter bank

Maser telemetry system

Los Canos microwave data link

Planetary radar decoder

IDAMA (Interferometer delay and multiplier/accumulator)

IF phase slope equalizers for IDAMA

First SPS (synchronous programmable sequencer)

Plastic spreaders for HF Facility transmission lines

Numerous UHF GaAsFet preamps

64-channel selectable-bandwidth filter bank

Box-car integrator

Motor-driven photometer mirror mounts

Welding of aluminum transmission lines for HF Facility

Design of Radar Interface (new A-to-D sampling system)

Test Equipment:

Linear near-field test range for line feeds

Cryogenic receiver test stand

Automated noise-figure measurement test set

Spherical near-field test range

Theoretical Studies:

Gregorian upgrade designs and feasibility studies

Shaping theory for multi-mirror reflector systems

Circuit topology of low-noise amplifiers

Experimental Studies:

Test section program to build data base for dual-polarization line

feed design