[GreenKeys] RK-65 RF Amp Questions

Thu, 11 Dec 2003 12:37:59 -0600

The 5D23 is identical to the RK-65.
All Ratheon tubes are covered in detail in Ludwell Sibley's book "Tube Lore"
Wayne  WB0CTE
----- Original Message ----- 
From: "Roy Morgan" <[email protected]>
To: "Merz Donald S" <[email protected]>; <[email protected]>;
<[email protected]>; "'Glowbugs (E-mail)"
<[email protected]>
Sent: Thursday, December 11, 2003 11:46 AM
Subject: Re: [GreenKeys] RK-65 RF Amp Questions


> At 10:26 AM 12/11/03 -0500, Merz Donald S wrote:
> >I have this RF amp here that is making its way up the to-do list. It uses
> >push-pull RK-65 tubes and a large B&W "CX" type tank assembly.  ...
> >
> >This is my first encounter with a piece of gear using RK-anything tubes.
> >Has anyone seen any published circuits using RK-65s?
>
>
> I did find specs for the tube at:
> http://www.mgte.com/rk-65-schm.pdf
> and he has a nice picture at:
> http://www.mgte.com/jpg/rk-65c.jpg
>
> It appears that at 3,000 volts on the plate, a pair of them will deliver
an
> output of one kilowatt in CW service.
>
> For published circuits, see any ARRL handbook prior to about 1950, and
> especially the very early west coast handbooks for transmitters using the
> 250 TL  or TH.
>
> >Does that tube have any equivalent types by other manufacturers?
>
> As I understand it, the RK-65 is similar to the 250 TH used in the
> Hallicrafters HT-4 and BC-610.  The fellows on the T-368/BC-610 list would
> have more information on that.
>
> >   Has anyone seen a good summary anywhere of the Raytheon line of
> > RK-series tubes?
>
> The 1944 ARRL Handbook lists a number of Raytheon transmitting tubes in
the
> context of other similar types.
>
> >  I can't see any rhyme or reason in their numbering system.
>
> They may have simply started with  a low number and just used the next one
> for a new tube type.
>
> >  And finally, does anyone have any RK-65's for sale or trade? I'd be
> > interested in picking up a couple for spares.
>
> The owner of the website below seems to have three for $55 each.  I say
buy
> them all.
> http://www.mgte.com/h_tesla.htm
>
> I found info below with a google search for "Raytheon RK-65"  There seemed
> to be some confusion comparing the 833 and the RK-65.  I have an example
of
> each and I assure you they are not at all the same tube and the 833 is a
> far bigger tube.  The owner of the website replied to someone on the
> TESLA  list that the RK-65 has "twice the capacity of the 833.  This is
> just plain wrong.
>
> from: http://www.pupman.com/listarchives/2001/November/msg00702.html
> >[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread
Index]
> >
> >RE: 833's
> >
> >
> >
> >      To: tesla-at-pupman-dot-com
> >      Subject: RE: 833's
> >      From: "Tesla list" <tesla-at-pupman-dot-com>
> >      Date: Wed, 21 Nov 2001 18:46:43 -0700
> >      Resent-Date: Wed, 21 Nov 2001 19:11:33 -0700
> >      Resent-From: tesla-at-pupman-dot-com
> >      Resent-Message-ID: <1W6y7B.A.VHB.U7F_7-at-poodle>
> >      Resent-Sender: tesla-request-at-pupman-dot-com
> >
> >
> >
> >Original poster: "John H. Couture by way of Terry Fritz
> ><twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
> >
> >
> >Dave -
> >
> >You are correct. The specs for the RK-65 are shown at
> >      http://www.mgte-dot-com/rk-65-schm.pdf
> >
> >These specs show the output for the RK-65 as 510 watts. This is less than
> >the 635 watts for the 833a tube. I was guessing at the 833a tube output
but
> >incorrectly used the 811 output which is about 200 watts. It is obvious I
am
> >not a tube expert. I am sorry if this has caused any inconvenience.
> >
> >John Couture
> >
> >-----------------------------
> >
> >-----Original Message-----
> >From: Tesla list [mailto:tesla-at-pupman-dot-com]
> >Sent: Wednesday, November 21, 2001 9:51 AM
> >To: tesla-at-pupman-dot-com
> >Subject: Re: 833's
> >
> >
> >Original poster: "David Speck by way of Terry Fritz
> ><twftesla-at-qwest-dot-net>"
> ><dspeck-at-relex-dot-com>
> >
> >John,
> >I checked the specs for the RK 65 tubes, vs. the 833a's
> >
> >Parameter 833A RK-65
> >Plate current, Class C 400 mA 200 mA
> >Power output, watts 635 watts 380 watts
> >Plate voltage 2500 2500
> >
> >Unless I'm reading the data wrong, it seems that an 833a is worth about
two
> >RK-65s.  Any comments?
> >Dave
> >
> >Tesla list wrote:
> > >
> > > Original poster: "John H. Couture by way of Terry Fritz
> ><twftesla-at-qwest-dot-net>"
> > > <couturejh-at-mgte-dot-com>
> > >
> > > Ben -
> > >
> > > Click on      www.mgte-dot-com
> > >
> > > Click on "TESLA"
> > >
> > > The Raytheon RK 65 tubes shown here have twice the capacity of the
833's
> >and
> > > they are brand new for only $55 plus shipping. You do not need a
socket
> > > because only 2 of the socket prongs are used (for the filament). The
grid
> > > connections are on the sides of the tube. The plate connection on the
top.
> > > Click on "Raytheon" for a photo. There is also plenty of test
equipment
> > > available at this web site.
> > >
> > > You can find my Tesla books and the on-line JHCTES Ver 3.3 computer
> >program
> > > by clicking on the JHCTES box.
> > >
> > > John Couture
>
>
> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
> 7130 Panorama Drive, Derwood MD 20855
> Home: 301-330-8828 Work: Voice: 301-975-3254,  Fax: 301-948-6213
> [email protected] --
>
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