I have a couple of the DG0VE Kon146-1100 2m upconverters here at present, one for me and one for GB3ZZ. When we tried it at GB3ZZ, we were not getting any results, so I had it back here to look at. It is difficult testing a frequency converter with my spectrum analyser, because you cannot set an offset between the tracking generator output and the spectrum analyser. However, I have a signal generator that can be set to provide a swept output, and so I set that running from 100-200MHz and the analyser from 1200-1300MHz with a max hold trace.
The upconverter allows you to set four local oscillator frequencies by means of internal jumpers; 1100, 1115, 1130 & 1145MHz. Purely for ease of arithmetic and round numbers, I set 1100MHz. Big mistake! Although it still works, it puts the output someway down the output bandpass filters curve. By setting the local oscillator to 1130MHz, I am getting 10-12dB more conversion gain at around 50dB, the claimed figure and the output is close to the curve peak. I suppose if you wanted, you could tweak the helical filter cores, but since both are brand new, I don't want to do too much yet! Both examples here were consistent in their results.
The moral of the story for anyone who has one of these devices is to use 1115 or preferably 1130 as the local oscillator frequency!
73 Shaun.
PS: Roberto has now advised that the two helical filters on the output can be tuned in the range 1240-1300MHz. It would seem the factory default is in the middle, 1270MHz, so choose the LO to output as close to this as possible for maximum gain.
DG0VE Kon146-1100 2m upconverter
The place to discuss reduced bandwidth fast scan amateur television on 70cms and below
Return to “Narrow Band DATV (RB-TV)”
Jump to
- Forum Admin
- ↳ Announcements
- ↳ Feedback
- ↳ New BATC WebSite and Online Shop
- ATV General Discussion
- ↳ Getting Started?
- ↳ General ATV Discussion
- ↳ DATV - Digital ATV
- ↳ The Portsdown Digital ATV System
- ↳ The Ryde Digital ATV Receiver
- ↳ ARISS HamTV
- ↳ The WinterHill DATV Receiver
- ↳ The Knucker DVB-T Tuner and Receive Software
- ↳ OpenTuner DATV Receive Software
- ↳ The MiniTiouner and MiniTioune Digital Receive Software
- ↳ LimeSDR Mini
- ↳ Es’hail-2 - DATV Transponder
- ↳ CAT 23 - Midland Air Museum Coventry 6 August 2023
- ↳ CQ-TV, The BATC Magazine
- ↳ ATV Activity and Contest Discussions
- ↳ BATC Bursary Grants
- ↳ Spectrum matters
- ↳ Streaming
- ↳ EMF Compliance
- ↳ Narrow Band DATV (RB-TV)
- ↳ Broadcast Equipment Discussion Zone
- ↳ DXSpot.TV
- ↳ Deutschsprachiges Forum
- ↳ Portsdown DATV Projekt - Deutschsprachiges Forum
- ↳ Minitioune(r) - Deutschsprachiges Forum
- ↳ Events
- ↳ Early Digital ATV Equipment
- ↳ DigiThin
- ↳ DigiLite
- ↳ BATC DTX1
- ↳ The Langstone Microwave Transceiver
- ↳ CaribouLite RPi Hat
- Adverts
- ↳ For Sale
- ↳ Wanted
- ↳ BATC Shop
- ATV Repeaters
- ↳ UK ATV Repeaters
- ↳ UK Repeater Details Moving to the BATC Wiki
- ↳ UK ATV Repeater News and Discussion
- ↳ GB3BH
- ↳ GB3CZ
- ↳ GB3DK
- ↳ GB3EN
- ↳ GB3ET
- ↳ GB3EY
- ↳ GB3FB
- ↳ GB3FT
- ↳ GB3FW
- ↳ GB3FY
- ↳ GB3GG
- ↳ GB3GV
- ↳ GB3GW
- ↳ GB3HV
- ↳ GB3IF
- ↳ GB3IT
- ↳ GB3IV
- ↳ GB3JT
- ↳ GB3KM
- ↳ GB3LO
- ↳ GB3LX
- ↳ GB3MV
- ↳ GB3NQ
- ↳ GB3NV
- ↳ GB3PV
- ↳ GB3RT
- ↳ GB3RV
- ↳ GB3SQ
- ↳ GB3TG
- ↳ GB3TM
- ↳ GB3TN
- ↳ GB3TT
- ↳ GB3TV
- ↳ GB3TZ
- ↳ GB3UD
- ↳ GB3VR
- ↳ GB3UT
- ↳ GB3VL
- ↳ GB3VV
- ↳ GB3VX
- ↳ GB3WV
- ↳ GB3YT
- ↳ GB3ZZ
- ↳ Internet-only Repeaters
- ↳ IO91LC
- ↳ IO91WN
- ↳ IO92GQ
- ↳ Overseas ATV Repeaters
- ↳ ATV Repeater Technical Topics
- Archive
- ↳ GB3AT
- ↳ GB3FT
- ↳ GB3FV
- ↳ GB3CT
- ↳ GB3AD
- ↳ GB3BG
- ↳ GB3DH
- ↳ GB3DJ
- ↳ GB3KT
- ↳ GB3NV
- ↳ GB3OT
- ↳ GB3PT
- ↳ GB3TB
- ↳ GB3TX
- ↳ GB3VW
- ↳ GB3XG
- ↳ GB3XT
- ↳ GB3XV
- ↳ GB3XY
- ↳ GB3YT
- ↳ GB3YX
- ↳ For Sale Ads Archive
- ↳ Wanted Ads Archive
- ↳ CAT 13 - Finningley 26/27 October 2013
- ↳ CAT 14 - Basingstoke 6/7 September 2014
- ↳ CAT 15 - Finningley 5/6 September 2015
- ↳ CAT 16 and BGM 2016
- ↳ CAT 17
- ↳ CAT18
- ↳ Mini-Conventions in 2019
- ↳ CAT 20 - Online 24 October 2020
- ↳ CQ-DATV, the e-book magazine
- ↳ CAT 21 - Part 2 Online Saturday 16 October 2021
- ↳ CAT 22 - Online 22 October 2022