T1 on JUMA TX-1

[OH2CBD]

Dear other hams

I was wondering if it's possible to substitute T1 on TX-1 with something self made?

On RX-1 this TDK transformer has been substituted with this:
http://www.jumaradio.com/juma-rx1/bifil ... er-en.html

I did similar also for TX-1, BN43-2402 with four turns of bifilar coil. I was able to bias the PA correctly (5mA+5mA per side and 100mA for driver) but somehow I just can't get enough output power even if I max out the RF gain. Test bench showed only around 1,2 watts on 3,5MHz.

Could this be due by self made transformer? Or should I tweak C6? I'm planning to get Kemet's replacement for TDK ZJYS51R5 since TDK is obsolete.

[OH2CBD]

I have also replaced T2 with Kemet 542CT. I hope it's suitable replacement.