Class E AM Forum

by **kf1z** » Mon Nov 09, 2009 5:29 pm

Here's some pics of a PWM modulator, Class-E transmitter, and RF to 2 phase converter I recently built....

by **kf1z** » Tue Nov 10, 2009 7:12 am

In those pics above..

All schematics came (of course

) from Steve, WA1QIX.

The modulator :
http://classeradio.com/newpwm.htm

The RF amp :

http://classeradio.com/8_fet.htm

by **wa2onk** » Tue Nov 10, 2009 8:11 am

Bruce, really nice neat work. Thanks for sharing them. I gotta get off my butt and finish my 40m rig...

by **nu2b** » Wed Nov 11, 2009 3:44 pm

Bruce,
Real nice and very professional looking!

Regards,
BobbyT

by **kf1z** » Wed Nov 11, 2009 8:42 pm

Thanks Chuck, and BobbyT..

That rig is in Ohio now (well, has been since early Spring).
I built it for a fellow out there..

Just getting around to posting some pics... trying to liven up the forum a bit!

There's been so little activity here lately...

by **K6IC** » Sat Nov 14, 2009 6:21 pm

Beautiful work, Bruce. Looks as if you have done this before. Very clean layout -- FB OM. 73, still working outside on projects here, but Winter is coming. Vic

by **Gilly** » Tue Nov 17, 2009 4:55 am

Hi Bruce

Looks great ....

The Sinewave generator seems small..
Is it a VFO or crystal controlled ??

Wayne

by **kf1z** » Tue Nov 17, 2009 7:25 am

Gilly wrote:Hi Bruce

Looks great ....

The Sinewave generator seems small..
Is it a VFO or crystal controlled ??

Wayne

Hi Wayne,
Neither one...

It takes input from a seperate transmitter, operating at 1X the frequency. ( 1 watt )
Then converts that sine wave, to 2 square wave signals 180 deg out of phase.
And has duty cycle adjustment on each.

That unit can be configured to take a vfo input, such as Steve's Hartley osc., at 2X the frequency of operation.

by **KD3CN** » Wed Nov 18, 2009 7:12 am

Bruce,
Absolutely first-class work! You've got building these things down pat...

Is that a Palstar tuning cap? Which model?

73, Karl

by **kf1z** » Wed Nov 18, 2009 9:02 am

KD3CN wrote:Bruce,
Absolutely first-class work! You've got building these things down pat...

Is that a Palstar tuning cap? Which model?

73, Karl

Hi Karl, thanks...

Yes, that's a Palstar C600.

550pf, 5.5kv

Last I knew RF parts was selling them for $129. (+ shipping)
And Palstar was getting $134.. $139 ? somewhere in there...

by **N1ESE** » Wed Apr 29, 2015 12:59 pm

Very nice Bruce, a dual deck for 75/160.. just what I want. I may have to try and copy this. I sometimes get intimidated when I see some of Steve's layouts and his extremely short lead RF decks soldering. Your layout looks like it'll be much easier for me to accomplish.

Going to NEARfest on Friday/Sat., let's see what I can find and come home with.

by **kf1z** » Wed Apr 29, 2015 5:58 pm

Closer pics of the RF layout here

http://greenmountainradio.com/k8rhh.html

by **wa2onk** » Fri Sep 11, 2015 11:21 pm

Bruce,
As with all the rig pics you post, this is really neat construction.... I am curious, did you come up with a pc board for the 2 phase box ?

Chuck...wa2onk

Class E AM Forum

Some pics, another rig.

Some pics, another rig.

Re: Some pics, another rig.

Re: Some pics, another rig.

Re: Some pics, another rig.

Re: Some pics, another rig.

Re: Some pics, another rig.

Re: Some pics, another rig.

Re: Some pics, another rig.

Re: Some pics, another rig.

Re: Some pics, another rig.

Re: Some pics, another rig.

Re: Some pics, another rig.

Re: Some pics, another rig.

Who is online