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Re: TRX2 power out problem

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...
by F5UL
26 Jun 2012 09:28
 
Forum: Juma Discussion
Topic: TRX2 power out problem
Replies: 4
Views: 3629

Re: TRX2 power out problem

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
by F5UL
25 Jun 2012 20:39
 
Forum: Juma Discussion
Topic: TRX2 power out problem
Replies: 4
Views: 3629

TRX2 power out problem

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 (BFG5...
by F5UL
22 Jun 2012 08:50
 
Forum: Juma Discussion
Topic: TRX2 power out problem
Replies: 4
Views: 3629

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