SmartSDR v3.9.19 and the SmartSDR v3.9.19 Release Notes
SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
The latest 4O3A Genius Product Software and Firmware
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.
Logikit CMOS-4 keyer and 6400M

I want to use this neat little keyer with my 6400M to get away from the keyer timing issue. No schematic info for the Flex so I don't know which keying output to select; positive or negative. Anyone know?
Also, will using an external keyer (via the key jack and turning off Iambic) solve the keying timing issue?
The expertise in this group is amazing; thanks! 73
Best Answer
-
All CW keying signal on any solid-state radio that I have experience with is positive on key open, and the keyer output shorts it to ground, i.e. an NPN transistor with emitter to ground and collector to the key input on the radio is the proper configuration.
The CMOS-4 is the best keyer available in my opinion, however it does not offer any computer interface. So I use the CMOS-4 with a paddle and a WinKeyer USB for contesting so that the macros from N1MM+ or WriteLog can key the radio. There are no timing issues with the Flex using an external keyer. (I should note that when using the WinKeyer in a contest, I have a switch box to switch the Begali paddle from the CMOS-4 to the WinKeyer simply and easily.)
73, Craig KØCF
1
Answers
-
Thanks for the info ... just what I needed. 73
0
Leave a Comment
Categories
- All Categories
- 349 Community Topics
- 2.1K New Ideas
- 613 The Flea Market
- 7.9K Software
- 5 SmartSDR+
- 6.3K SmartSDR for Windows
- 173 SmartSDR for Maestro and M models
- 411 SmartSDR for Mac
- 267 SmartSDR for iOS
- 249 SmartSDR CAT
- 186 DAX
- 375 SmartSDR API
- 9.2K Radios and Accessories
- 22 Aurora
- 205 FLEX-8000 Signature Series
- 7.1K FLEX-6000 Signature Series
- 920 Maestro
- 53 FlexControl
- 860 FLEX Series (Legacy) Radios
- 892 Genius Products
- 454 Power Genius XL Amplifier
- 322 Tuner Genius XL
- 116 Antenna Genius
- 283 Shack Infrastructure
- 199 Networking
- 444 Remote Operation (SmartLink)
- 137 Contesting
- 754 Peripherals & Station Integration
- 139 Amateur Radio Interests
- 973 Third-Party Software