Don't sell yourself short! While you don't have a 4 year degree, you do have a lot of experience. The fact that it's electronics and communications is a plus.
Were I looking for an Oracle DBA, you'd be sending me a resume. I would much rather hire an older person (stable) with life experience and the ability to comprehend large systems (big picture) that some kid who has a degree.
What do I have against recent graduates? Nothing, but education in the US just isn't what it used to be. My company's foreign offices require state-mandated proficiency testing for American Degrees. While these countries don't trust US issued degrees, my guess is that if you consider yourself satisfactory, you'd pass these with flying colors.
The trick is convincing a potential employer, who may not know these things, that you are worth talking to. Find any and all aspects of the job you want that overlap your current skills and highlight them in your resume. Focus on smaller companies, you'll have more success and see the fruits of your labors.
That being said, have you considered working for yourself? I started over at 40 and built a loyal customer base that paid the bills (and then some). Expansion was inevitable, but opening branch offices in Europe and Oceania was a terrifying step.
Now, I am semi-retired at your age, and serve on the board of directors for a non-profit lobbying organization representing tech and small business to federal, state, and local government.
Here are the secrets: Believe you can. Constantly improve your skills. Learn from mistakes. Live outside your comfort zone. Reward yourself when you succeed. Remember the 10 shortest words of greatest power: If it is to be, it is up to me.
