OM,
I am sitting here looking at one I built in 1966..... Miine is in a
19" rack panel mounting. It was described in a QST article, Back
then, I was in Pratt Institute 'EE, working part time as a stock boy
in a Bohack supermarket, spending all my earnings at Barry's Green
Sheet Surplus Electronics in Radio Row, NYC. I had seen this
WONDERFUL article about using sweep tubes, a solid state (silicon
rectifiers in a voltage doubler config that took input from a surplus
110VAC to 220VAC 1:2 2.5KW rated Line transformer up to almost 500VDC
to feed 12 parallel Sweep tubes. It had a 50 ohm input resistor
network and the 12 tubes presented a 72 ohm output impedance to a
continuously tuned Roller Inductor to match the output into a B&W LPF
going to the antenna. Even with the LPF, it absolutely destroyed
some of the TV channels being received by rabbit ear antenns for many
blocks around my folks apartment. Luckily, I was sending FSK and no
one could figure out what strange disaster had found their TV sets
and channel 5 and channel 2....... ;) I even used Window screening
wire for the chassis enclosure material in an attempt to create a
faraday cage. Hi Hi.
73,
Ben WB2RHM
At 12:00 12/5/2017, you wrote:
Message: 3
Date: Mon, 4 Dec 2017 14:01:07 -0800
From: Tom Osborne <w7why1@gmail.com>
To: cq-contest@contesting.com
Subject: Re: [CQ-Contest] [Amps] amplifier in 1960's QST
Message-ID:
<CAG32hyP4upF5Xfz7O=C42si5t54f_JFamRNXF7j90XX0Uy9GDQ@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
WRL had the Galaxy 2000 amplifier that used 10 sweep tubes in it for a KW.
73
Tom W7WHY
http://www.eham.net/reviews/detail/1537
On Mon, Dec 4, 2017 at 1:53 PM, <fortra@siol.net> wrote:
> Hi Bill,
> i do remember seeing an article with 8 to 10 TV horizontal amplifier
> sweep tubes. They were Philips or Valvo, or Siemens, marked
> as PL519, PL509 and not sure PL505. There were also line of EL519
> but, faintly they did not fit the drawing due to heating.
>
> The PL519 were either designed for 24 Volts or similar voltage, thus
> they used quite some number of them.
>
> It was published in our Radioamater , same as QST as national amateur radio
> magazine. And when our "brother ina arms " CBers find that, you have got
> number of
> amps...
> Also, if my memory serves me, there was an article in German CQ-DL thus,
> play bit
> with google ans see, if you got any respones...
>
> Kind regards Bill,
>
> Nermin S58DX
>
> -----Izvorno sporo?ilo----- From: Fuqua, Bill L
> Sent: Monday, December 04, 2017 6:06 PM
> To: amps@contesting.com
> Subject: [Amps] amplifier in 1960's QST
>
> I have been looking for an article about a suitcase kW amplifier using a
> load of sweep tubes. directly off power line power supply (voltage
> multiplier) and a broadband matching network. Not interested in building
> one because there are all sorts of problems with the idea. I think it was
> in late 60's but I can't find it. Perhaps it was not QST.
>
> Anyone remember it?
>
>
> 73
>
> Bill wa4lav
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
------------------------------
Message: 4
Date: Tue, 05 Dec 2017 09:24:28 -0500
From: k2ttt <k2ttt@optonline.net>
To: Tom Osborne <w7why1@gmail.com>, cq-contest@contesting.com
Subject: Re: [CQ-Contest] [Amps] amplifier in 1960's QST
Message-ID: <AF.B9.04056.F1CA62A5@mta1.srv.hcvlny.cv.net>
Content-Type: text/plain; charset=utf-8
I had one of those, 10 matched 6hf5 in the final,? great for keeping
the coffee hotk2ttt/c6att jay
-------- Original message --------From: Tom Osborne
<w7why1@gmail.com> Date: 12/4/17 5:01 PM (GMT-05:00) To:
cq-contest@contesting.com Subject: Re: [CQ-Contest] [Amps] amplifier
in 1960's QST
WRL had the Galaxy 2000 amplifier that used 10 sweep tubes in it for a KW.
73
Tom W7WHY
http://www.eham.net/reviews/detail/1537
On Mon, Dec 4, 2017 at 1:53 PM, <fortra@siol.net> wrote:
> Hi Bill,
> i do remember seeing an article with 8 to 10 TV horizontal amplifier
> sweep tubes. They were Philips or Valvo, or Siemens, marked
> as PL519, PL509 and not sure PL505. There were also line of EL519
> but, faintly they did not fit the drawing due to heating.
>
> The PL519 were either designed for 24 Volts or similar voltage, thus
> they used quite some number of them.
>
> It was published in our Radioamater , same as QST as national amateur radio
> magazine. And when our "brother ina arms " CBers find that, you have got
> number of
> amps...
> Also, if my memory serves me, there was an article in German CQ-DL thus,
> play bit
> with google ans see, if you got any respones...
>
> Kind regards Bill,
>
> Nermin S58DX
>
> -----Izvorno sporo?ilo----- From: Fuqua, Bill L
> Sent: Monday, December 04, 2017 6:06 PM
> To: amps@contesting.com
> Subject: [Amps] amplifier in 1960's QST
>
> I have been looking for an article about a suitcase kW amplifier using a
> load of sweep tubes. directly off power line power supply (voltage
> multiplier) and a broadband matching network. Not interested in building
> one because there are all sorts of problems with the idea. I think it was
> in late 60's but I can't find it. Perhaps it was not QST.
>
> Anyone remember it?
>
>
> 73
>
> Bill wa4lav
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
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