I was impressed the first 3KA I worked on by the sheer size of the tank circuit
components as well as the input network layout. The thing that really looks out
of place is the 3-500z tubes...It seems to me 3cx3000a7 would look right at
home in there...Or pair 3cx1200a7....Bet you wouldn`t flat top those tubes in
the old Henry..Jim.
----- Original Message -----
From: Joe Isabella
To: k7rdx ; Gudguyham@aol.com ; amps@contesting.com
Sent: Tuesday, August 09, 2005 9:59 AM
Subject: Re: [Amps] RF Parts OEM 3-500ZG's
Remember, the 3K-A was designed as a commercial/government use amp. It has
no standby switch, and is built pretty stout (weighs nearly 200lbs.). I'm
about to take mine down to give it a good cleaning, add 160m to it, and add
some relays so I can remotely control the fils, blower, and put it in standby
when not needed. I've seen RFP 3-500ZGs do nearly 2500W out in another Henry
amp that was modified -- I'm sure it was pretty dirty at those levels, but hey,
who cares during a contest, right??
And like I said before, if you think 3-500s aren't good for 1kW PEP, tell
Ameritron...
:-D
Joe, N3JI
k7rdx <k7rdx@earthlink.net> wrote:
Some of the older Henry 3k amps had current limiting in the psu negative and
required 100+ watts drive for just 1200 or so output (Easily disabled).2K
output(Very possible) from a Henry equipped with 3-500z tubes seems a bit
excessive to me,especially if your`e concerned about keeping neighbors and
fellow hams happy..Jim.
----- Original Message -----
From:
To: ;
Sent: Monday, August 08, 2005 7:58 PM
Subject: Re: [Amps] RF Parts OEM 3-500ZG's
>
> In a message dated 8/8/2005 11:56:52 A.M. Eastern Standard Time,
> n3ji@yahoo.com writes:
>
> Maybe you should try it with **TWO** 3-500ZGs, like my Henry runs. It
will
> provide nearly 4kV at 1A with Peter Dahl upgrades.
>
> Joe, N3JI
>
>
>
>
> I wont comment on the first sentence, but the 4KV would probably have to
be
> under load. Most amps except for your Henry WONT give 4KV under load.
Any
> other amp except one like yours will not produce that kind of power from
3-500s
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
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