[VHFcontesting] Warmup Drift Of Ukranian , UT5JCW, 222 MHz Transverters & Possible Use With FT-8

[peter h]

0715pdt 16april2021
A number of us in SoCal have been using UT5JCW's 222MHz transverters with good success on CW/SSB/FM from home and hilltopping/roving.
Tim, N6GP, wondered if they are suitable for use on FT-8.
Steve, WA6EJO, 'volunteered' to plot drift data on his UT5JCW 222MHz transverter.
His results are tabulated below.
    Steve, WA6EJO, did some transmit frequency stability tests using a GPSDO referenced frequency counter.
  Some of the drift may be due to the exciter, a TS2000X, but most is from the Ukranian transverter. 
  From 2 to 3 minutes after power on it moved -227 Hz 3 to 4 minutes -103 Hz 4 to 5 minutes -64 Hz 5 to 6 minutes -45 Hz 6 to 7 minutes -27 Hz 7 to 8 minutes -21 Hz 8 to 9 minutes -17 Hz 9 to 10 minutes -7 Hz 10 to 15 minutes +50 Hz 15 to 20 minutes +13 Hz 20 to 25 minutes +47 Hz 25 to 30 minutes +37 Hz
 

Do any experienced FT-8 users have any comments on possible use of the transverters with data modes?
Thanks,
BT73
Pete, N6ZE