Want to get a transverter for 70cm. Never used one, I was always an HF guy. For the time being I'd be using it for repeaters and simplex, maybe down the road some satellite stuff.
I found a source for one (Q5signal>> q5signal.com/index.php?route=product/category&path=63 ) but I'm not sure of the configuration I would need for my SunSDR2DX. I was thinking of getting the 25w version and if necessary get and amp if needed down the road. Or would I be better off just getting one of the higher power models? Anyway I really appreciate any help.

I have the choices listed below. The only one I'm relatively sure of is the "High Stability Oscillator".

Available Options

IF Configuration
Common IF
Split IF

RF Configuration
Common RF
Split RF

IF Drive Level
-20dBm to 0dBm
0dBm to +20dBm
1W to 10W

PTT Polarity
Low (GND)
High (>1.7V)

Filter Tuning
Standard Tuning
Wideband 430 - 440MHz (+$35.00)
Wideband 440 - 450MHz (+$35.00)
Wideband 430 - 450MHz (+$35.00)

Local Oscillator Stability
Standard
High Stability 0.28ppm (+$45.00)

Custom IF
Standard IF - 28MHz
Custom IF - Please Specify at Checkout (+$35.00)

Hi.
I would chose 144 Mhz if . Then you are sure you will never give it 100W from 28 Mhz if. your VHF/UHF work will be on the A1 antenna .. with 10W input and common IF . that side is fine.
Also you only have 2 MHZ (28-30) FROM 28 MHZ IF .. With 144 IF you have 4 Mhz . I think 70cm in the US is wider , here in Denmark I have 432-438 Mhz.
on the transverter RF side some prefer split (one rx and one tx ) , then they kan use two cables to the antenna and place a preamp a coax relay and a PA close to the antenna.
Cable losses are a issue on 70cm . 25W transverter output is fine , but you need good low loss cables to your antenna.

just some ideas , I am sure there are many more.

I use a sunsdr2pro and transverters for 23cm 13cm 6cm 3cm and 24 Ghz.

73 de oz1ctz. Brian