Is Class E ClEan??

Welcome and feel free to ask questions about class E, mosfet's, and AM.
You must be registered to post.

Is Class E ClEan??

Postby VE7KHz » Tue Feb 04, 2003 5:16 pm

As I ponder how best to build one of these wonderful sounding transmitters, I can't help but think of my neighbors, who have quite crappy VCR's and TV's which can even pick up our baby monitor TX :lol: and have made mention of my single 813 rigs fine audio in their stereo.

I would like to know how clean these Class E babies are as far as harmonics go up the band etc.? Has anyone looked on an analyser to see what little nasties might be there, or is it impecibly clean? My 813 rig's worst harmonic is 2nd at -38dB so anything better than this will be great.

Look forward to hearing from you.

Paul

VE7KHz
I used to keep an open mind.......but my brain kept falling out.
User avatar
VE7KHz
Member
 
Posts: 23
Joined: Fri Jan 31, 2003 3:01 pm

Cleaner than a vacuum tube transmitter [at least mine is]

Postby steve_qix » Tue Feb 04, 2003 6:13 pm

Hi!

I must say that my class E transmitters are MUCH cleaner than any vacuum tube transmitter I've ever built. This may be due to the fact that, since the FETs are high capacitance devices, it's hard to generate 60+mhz signals out of them.

Class E also works using "soft" sided waveforms.

I don't TOUCH my own set (no cable here!) on any channel.

My vacuum tube rigs interfered pretty badly.

That's my experience.....

Regards,

Steve
Visit the class E web site at:

http://www.classeradio.com
User avatar
steve_qix
Class E Guru
 
Posts: 434
Joined: Fri Jan 31, 2003 11:03 am
Location: Townsend MA

Super! That's great. clEan is mEan

Postby VE7KHz » Tue Feb 04, 2003 6:19 pm

Thanks Steve!

That's what I was hoping to hear. See the parts source list for a thought on surplus 48VDC supplies.

cheers!

Warm up the soldering iron.

Paul
VE7KHz
I used to keep an open mind.......but my brain kept falling out.
User avatar
VE7KHz
Member
 
Posts: 23
Joined: Fri Jan 31, 2003 3:01 pm


Return to Class E Discussion

Who is online

Users browsing this forum: No registered users and 1 guest

cron