trv for 2,3 ghz eme

TRV for 2,3 GHz EME

DIFFERENCES OF 2,3 GHZ BAND AROUND THE GLOBE

Zdenek SAMEK – OK1DFC – OK5EME

EME traffic and QRGs use

Australia 2300 – 2302 MHz ( VK3XN – 2301,990 MHz )

USA 2304 – 2306 MHz ( Rxing 2320 for cross band QSOs )

EU 2320 – 2322 MHz ( many countries can to use full range of 2,3 GHz)

JA – 2424 – 2426 MHz – problems with Wi-Fi interference ( 2015 – year

expecting 2400 – 2405 MHz )

Traffic: CW – SSB - JT65c

Technical Seminar Zieleniec 2014

Minimum for test of EME QSO

VLNA – 0,5 dB N/F ( G4DDK kit or Down East Microwave W5LUA kit)

SSPA – 100W ( Spectran, Andrew UMTS units ) Nokia 350W etc.

Dish – 2,5m or bigger

Dish tracking – OE5JFL ideal solution, F1EHN more sophisticate system

minimum 1° el and azimuth

Good QRG stability and good QRG readout

Approximately 75 active stations now, many big guns for first tests


TRV EME pedition requests

Cross band traffic RX / TX on different bands without manual switching

Good linearity for SSB

Minimum RF 50 W as a SSPA driver with 20m of coaxial cable

Internal power supply ( input 100 – 245V – output 28V/10A)

Minimum connecting cables between units on the table (special on EME pedition)

Internal sequencer


Cross Band traffic – PLL LO

Cross Band TX / RX separately

High QRG stability (JT65C) and QRG

accuracy

Immediate locking of QRG after TX/RX

switch

Only one existing carrier on the Band

PLL LO kit N5AC + GPS, Rubidium

normal or HQ TCXO 10 MHz


Clear carrier

LO 10875,000 MHz EU band

Span 180 MHz


TRV

Wide band of TRV hairpin filters ( cover

2302 – 2424 MHz = 122 MHz broadband !!!

Enough conversion gain (18 – 20 dB )

Minimum RF out +15dBm

Easy build, minimum special requests, low

noise GaAs MMICs

Down East Microwave solution as a kit.


Filters

Max. Bandwidth 6 MHz for -3dB

LO rejection in the filter

Switching between bands and RX/TX exchange


Sequencer

Switching in sequence periods TRV – PA – Relay – VLNA and back

Possible switch to ground or with +15V DC out


SSPA – 80W RF out

Simplicity

Spectran UMTS module

Good cooling

Measuring SWR

SWR protection trough circulator


TRV mechanical solution

Modularity

Easy build – easy maintenance

Good looking design

Picture without board of filters


OK1DFC setup

At Home – 10m dish and 500W SSPA

At Portable 3,2m dish and 250W SSPA

QRV as E77DX, IS0/OK5EME, OM/OK1DFC, SP/OK5EME

Smallest station worked

H44HP – 150W 76el Yagi

6W/PE1L – 200W 76el Yagi


Thank you for attention !!!

See you via Moon

More details you can find on www.ok1dfc.com


trv for 2,3 ghz eme

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