FS: Transmitting Tubes etc.

Scott Johnson scottjohnson1 at COX.NET
Thu Feb 26 07:56:05 EST 2004


Glen is right.  I think perhaps there might be two tubes with the same #,
but the one talked about here is an Amperex design that was part of their
push -pull line of tubes built on the basis of the "grandpappy " RCA 829/
832 this line includes the 6360,6939,6907,5894, and several others that both
Mot and GE used in their land mobile gear in the fifties and sixties.  These
tubes are absolute works of art, but the dainty little 6907 ain't gonna put
out 80 watts no way no how.  Some place I have an Amperex data book, and if
I find it I will post the specs.
73,
Scott
----- Original Message -----
From: "Glen Zook" <gzook at YAHOO.COM>
To: <BOATANCHORS at LISTSERV.TEMPE.GOV>
Sent: Wednesday, February 25, 2004 9:17 AM
Subject: Re: FS: Transmitting Tubes etc.


> Same here!  The 6907 is the next step above the 832A
> and below the 829B.  The 5894 is the next step above
> the 829B and the 8643 is the next one over the 5894.
>
> There is no way a 6907 is going to put out 80 watts
> and last very long in a practical circuit!  Motorola
> used them in some of the 15 - 18 watt output mobiles.
> I have several around left over from when I owned the
> Motorola reconditioned equipment center for the
> south-central United States.
>
> They are about 40% of the height of the 5894, about
> the size of the 832A except they are pretty much a
> cylinder in shape.  They are a pretty good VHF / UHF
> tube, at least up through the 70 cm band.
>
> Glen, K9STH
>
>
> --- Neil McKie <n.mckie at BENDCABLE.COM> wrote:
>
> In my experience with the 6907's (I have a few here
> somewhere) the  maximum I ever got out one was about
> 18 watts on the 460 MHz band - in commercial two-way
> radio service.
>
> =====
> Glen, K9STH
>
> Web sites
>
> http://home.comcast.net/~k9sth
> http://home.comcast.net/~zcomco
>
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