Does anyone have an audio file (.mp3 or .wav etc) of one of these
transmitters? Being VERY new to AM and having a burning desire to build
something that keeps the smoke inside the parts, I would like to venture
out on this project!
Going WAY back (and yes this even includes my CB days back in the 70s) it
was VERY important for my station to sound CLEAN! I really like the D-104
but not too fond of the sound quality. I suspect that the D-104 was not
matched to the radio correctly.
So if you have a recording of one of these transmitters, what mic are you
using? What mic is recommended? I own a Shure 444-D, 526T, D-104SE, D-104
unamplified with the 10-DA head, various Yaesu Mics, and Heil. I was even
thinking of putting a HC-5 element in a D-104 (which sits nice on my
belly!) and scraping the internal amp. But then again, the HC-5 was
designed for SSB.
Garbage in, garbage out. I think an audio circuit should be designed with
all the intended parts in mind. But then again, I really don't know what
I'm talking about yet. Building this transmitter will teach me...and I
want to learn! How do you put a 2000 ohm mic on a circuit designed for a
600 ohm mic?
I have a lot of reading to do and maybe some of this is covered in the
text. But I would sure like to hear one!
My other hobby is High End Audio. I like tubes! I've owned Mark Levinson
and it sounds great! But I like tubes better! I'm hoping this Class E
transmitter "sounds" good! KFI here is Southern CA does not have the same
romance that it did when it had tube transmitters.
What about a hybrid design? Tube audio circuit into a mosfet final
amplifier? Some High End Audio companies use tube pre amps and solid state
amplifiers with their integrated amps. Its just a thought.
OK, teach me! I want to learn! Nobody is going to call me an appliance
operator!
Dino...K6RIX
At 01:23 PM 08/22/2002 -0500, Steve Cloutier, 978-597-3311 wrote:
Hi!
For anyone who is planning on building the 360 watt, 6 FET transmitter
which I have documented on the class E web site, I have changed the design
to reflect changes needed for the new Fairchild MOSFETs.
Anywon who is planning on using the Fairchild FETs in this design should
get the updated information and look at the new pictures of the transmitter.
The transmitter is somewhat more efficient with the new Fairchild MOSFETs,
and the new design uses a simpler driver than the previous design.
I will have MOSFETs available at Boxboro for those who want them. Bob,
K1KBW and I will also have an operating class E transmitter.
I am doing a presentation about class E at the AM Forum on Saturday at
Boxboro. See you there is you can make it!
The class E site is at: http://www.netway.com/~stevec/ham/classe.htm
Regards,
Steve WA1QIX
