Think I agree with you Carl. I've researched what I could find on the
I'net.
Found that Jeff Blaine ACOC put a 3-sided plexiglass wall around the
choke and added some door knobs to replace the old caps.
See: http://ac0c.com/main/page_homebrew_alpha_76pa_mods.html
Then W8JI had a nice article on RF Chokes that made sense too, think Tom
is the designer of the Ameritron's as well.
see: http://www.w8ji.com/rf_plate_choke.htm
Also Dick, N4UQ don't really give out much info on his $259 Warc Band fix.
I am scared of the arcing but if you have had success, experience speaks
for itself!
Do you know if the Ameritron one is taller or bigger in diameter then
the stock one?
Thanks ... 73 Dwight NS9I
On 4/1/2014 8:18 AM, Carl wrote:
There is more ways to skin a cat. Dick possibly didnt know about the
Ameritron choke or the 3 versions before it came out right.
Id be willing to bet there are a lot more 8874/3CX-800 Alphas on both
WARC's than Dick ever dreamt of doing.
Carl
KM1H
----- Original Message ----- From: "Bob K6UJ" <k6uj@pacbell.net>
To: "Amps reflector" <amps@contesting.com>
Sent: Monday, March 31, 2014 9:38 PM
Subject: Re: [Amps] Alpha 76PA
I also have a 76PA that has been upgraded to 3CX800A7'S, vac relays,
etc done by Dick N4UQ.
Its been a while since I have asked Dick about mods to my 76PA for
12M but as I recall it was a more extensive mod than
just swapping out the plate choke and I decided not to do it. I
would bounce this question off Dick again to get his input.
Let us know what you find out. I would be interested in doing a 12 m
upgrade also if it wasn't too big of a deal.
Bob
K6UJ
On Mar 31, 2014, at 12:15 PM, DGB wrote:
Thanks much Carl!
73 Dwight NS9I
On 3/31/2014 1:09 PM, Carl wrote:
That choke is the same as the $20 Ameritron and works fine in my
stock tubed 76PA. Placement is a bit tight but Ive had no arcing or
detuning.
Carl
KM1H
----- Original Message ----- From: "DGB" <ns9i2016@bayland.net>
To: <amps@contesting.com>
Sent: Monday, March 31, 2014 7:02 AM
Subject: [Amps] Alpha 76PA
I have recently obtained an Alpha 76PA that has the 3CX800A7's,
Vacuum Relays, and low power modification and meter modification,
apparently done by Dick Byrd N4UQ some time back.
The 12m mod was never performed and I would like some input on this.
I read an article by Mat KK5DR that this can be done simply by
swapping out the plate choke with an RFC3 from RF Parts.
Is it that simple?
thanks 73 Dwight NS9I
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