JUMA Amateur Radio Forum

Hello Adrian, You where right in the point!!! The fault was RL-5, who was permanently exited. That was why the 18/28 Mhz was working OK (the relay already in place!) and with the other low pass filters switched in, well the output was going down!!! The culprit was TR5, (2N7002) shorted drain/ source ...

Hi, Adrian,
Thank you for your kind reply.
I will follow tomorow your indication and verify all circuits indicated.
I suspect the low pass filter, by instinct, as predriver and drivers look like they are doing there job.
But I will verify that
Good evening Adrian, c u tomorrow!
F5UL Bob

I'm working on a power problem on my TRX2! You will find thereafter the power level and collector curent I found : Band Power IC 1.8 2.8 3.06 3.5 1.6 3.05 7.0 2.5 3.04 10.1 3.8 2.81 14.1 4.0 2.80 18.1 12.0 2.06 21.1 11.0 1.98 24.9 13.0 2.22 28.5 12.1 2.09 What disturbed me was that, on the TR1 ...