Down East Microwave Design Notes

• DN001: IP3 improvement for 50 to 432 MHz Transverters

• DN002: IP3 improvements for 50 MHz through 1900MHz Preamplifiers

• DN003: Excessive Local Oscillator feed through power on TXRF and RXIF ports

• DN005: IP3 improvement for 903 to 1296 MHz Transverters

• DN006: Information on how to Interface an AOS with a Transverter that contains an RVD

• DN007: Upgrade for first generation TR Sequencer

• DN009A: Receive Converter Protection Circuitry

• DN010: Assembly of Times Microwave LMR-400 connectors

• DN011: Interfacing Transverters to low current "Push to Talk" circuits of some modern Transceivers.

• DN012: MICROLO drive level in 2304-144K and 2304-144CK

• DN013: Frequency offset of DEM2400-144RX receive converter

• DN014: Frequency drift of DEM432-28 Transverter

• DN015: Sudden drop in Receive gain

• DN016: Low Frequency of Local Oscillators in all Microwave Transverters

• DN017: Retrofitting a RF power detection circuit for all DEM transverter and power amplifier.

• DN018: Specialized Keying functions of Transverters and Power Amplifiers.

• DN019:  Mast Mount LNA power switch option for High Power Transverters.

• DN020:  VCXO circuitry for MICRO LO.

• DN021:  FMM5061VF Retrofit in 10368-144 two watt transverter

• DN022:  1 watt output of AH215 in 1296 MHz transverter

• DN023:  Dual 10MHz source for A-32 Synthesizer

• DN024:  Coax Bias for L series VHF/UHF LNA's

• DN025:  Install A-32 in 900 and 1200 MHz clamshell transverters

• DN026:  Multiplier circuit for WSSA - A32

• DN027: LO replacement in the VHF transverters with the VHF ApolLO retro fit kit (VHFAPOLLOK)

• DN028: LO replacement in 432-28 transverters with the VHF ApolLO retro fit kit (VHFAPOLLOK)

• DN029: Installing the VHF ApolLO in the "L" series VHF/UHF transaverters (LVHFAPOLK)

• DN030: Understanding the frequency capabilities of VHF ApolLO with DEMI transverters

• DN031: Utilizing the VHF ApolLO as a Weak Signal Source (WSS)

• DN032: Installing the VHF ApolLO in the “L” series 144-28INT Transverter, the VHF ApolLO K

• DN033: Enable / Disable Sequencer in the “L” series Transverters)

• DN034: Positive Lock modification for the A32 and VHF ApolLO synthesizer