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Author Topic: Suggestions for getting started homebrewing?  (Read 8589 times)
K9ZF
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« Reply #30 on: August 27, 2013, 05:49:30 AM »

Thanks!

73 Dan

--
K9ZF
Amateur Radio Emergency Service, Clark County Indiana. EM78el
former K9ZF /R no budget Rover ***QRP-l #1269
Check out the Rover Resource Page at:
<http://www.qsl.net/n9rla>
List Administrator for: InHam+grid-loc+ham-books
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K9ZF
Amateur Radio Emergency Service, Clark County Indiana. EM78el
The once and future K9ZF /R no budget Rover
 ***QRP-l #1269
Check out the Rover Resource Page at:
<http://www.qsl.net/n9rla>
List Administrator for: InHam+grid-loc+ham-books
Ask me how to join the Indiana Ham Maili
W9GB
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Posts: 2616




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« Reply #31 on: August 27, 2013, 03:03:04 PM »

Quote from: K9ZF
I guess I have a project in mind.  
With a bit of encouragement from everyone here, I am leaning toward a 6m GI7B design.
Dan -

For comparison, you should look at the G3WOS 6-meter DXpedition amplifier by Chris.
http://www.gare.co.uk/amplifier/

Chris used the readily available Eimac 8877 ceramic triode and G3SEK Triode Board.
You can DIY Build from his detailed plans.

Chris did use a commercial shop to build the aluminum chassis/case (nice work)
ADD Precision (UK), who fabricated the case, still has Chris' plans.
http://www.gare.co.uk/amplifier/dxpedition_amplifier_case.htm

The AC transformers are from Heritage Transformers in Eastview, KY USA.

Heritage Transformer Co
13483 Leitchfield Rd
Eastview, KY 42732
+1 (270) 862-9877

G3WOS 6-meter DXpedition Amplifier
Full parts list:
http://www.gare.co.uk/amplifier/dxpedition_amplifier_parts_list.htm
« Last Edit: August 27, 2013, 03:16:49 PM by W9GB » Logged
W0BTU
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Posts: 1637


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« Reply #32 on: August 31, 2013, 09:51:38 PM »

Good suggestions about the references to read before building an amplifier. I studied many of those myself before I built my latest legal limit amp.

What I didn't see suggested here were the many pages at http://www.w8ji.com/Amplifiers.htm . I studied those very carefully, and I think my amplifier works better because of following Tom's tech advice there. He has designed many amateur and commercial amplifiers in common use today, and he knows what he's talking about.

The last thing I would read is anything printed by the ARRL. They have some good stuff, but I've just seen too many errors in their publications --especially about amplifiers-- over the years.
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KC8OJU
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Posts: 31




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« Reply #33 on: September 02, 2013, 05:00:34 AM »

Hey OM,
This is one good document to read, the care and feeding of power tubes by the new owners of Eimac, CPII.
http://www.cpii.com/docs/related/22/C&F2Web.pdf

Good luck and good dxing.

73 OT
de n8zu
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K9ZF
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Posts: 76


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« Reply #34 on: September 04, 2013, 11:40:03 AM »

Thanks for all of the links!

I have a copy of Orr's Handbook, I will read it again since it has been quite a few years...

I downloaded a copy of Care & Feeding.  I will spend some time with it.

And,  I have spent many hours with W8JI's web page.  It is one of my favorites.  Right up there with W4RNL's antenna page...

It looks like I will have an interesting "winter project" this year.

73
Dan
--
K9ZF
Amateur Radio Emergency Service, Clark County Indiana. EM78el
former K9ZF /R no budget Rover ***QRP-l #1269
Check out the Rover Resource Page at:
<http://www.qsl.net/n9rla>
List Administrator for: InHam+grid-loc+ham-books
Ask me how to join the Indiana Ham Mailing list!
Logged

--
K9ZF
Amateur Radio Emergency Service, Clark County Indiana. EM78el
The once and future K9ZF /R no budget Rover
 ***QRP-l #1269
Check out the Rover Resource Page at:
<http://www.qsl.net/n9rla>
List Administrator for: InHam+grid-loc+ham-books
Ask me how to join the Indiana Ham Maili
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